Document and Entity Information - shares |
3 Months Ended | |
|---|---|---|
Mar. 31, 2019 |
Apr. 30, 2019 |
|
| Document Information [Line Items] | ||
| Document Type | 10-Q | |
| Amendment Flag | false | |
| Document Period End Date | Mar. 31, 2019 | |
| Document Fiscal Year Focus | 2019 | |
| Document Fiscal Period Focus | Q1 | |
| Trading Symbol | BSM | |
| Entity Registrant Name | Black Stone Minerals, L.P. | |
| Entity Central Index Key | 0001621434 | |
| Current Fiscal Year End Date | --12-31 | |
| Entity Filer Category | Large Accelerated Filer | |
| Emerging Growth Company | false | |
| Small Business | false | |
| Common Units | ||
| Document Information [Line Items] | ||
| Entity Partnership Units Outstanding (in shares) | 109,382,957 | |
| Subordinated Units | ||
| Document Information [Line Items] | ||
| Entity Partnership Units Outstanding (in shares) | 96,328,836 | |
| Preferred Units | ||
| Document Information [Line Items] | ||
| Entity Partnership Units Outstanding (in shares) | 14,711,219 |
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- Definition If the value is true, then the document is an amendment to previously-filed/accepted document. No definition available.
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- Definition End date of current fiscal year in the format --MM-DD. No definition available.
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- Definition This is focus fiscal period of the document report. For a first quarter 2006 quarterly report, which may also provide financial information from prior periods, the first fiscal quarter should be given as the fiscal period focus. Values: FY, Q1, Q2, Q3, Q4, H1, H2, M9, T1, T2, T3, M8, CY. No definition available.
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- Definition This is focus fiscal year of the document report in CCYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006. No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD. No definition available.
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- Definition The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'. No definition available.
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- Definition A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument. No definition available.
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- Definition Indicate if registrant meets the emerging growth company criteria. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Indicate whether the registrant is one of the following: (1) Large Accelerated Filer, (2) Accelerated Filer, (3) Non-accelerated Filer, (4) Smaller Reporting Company (Non-accelerated), (5) Smaller Reporting Accelerated Filer or (6) Smaller Reporting Company and Large Accelerated Filer. Definitions of these categories are stated in Rule 12b-2 of the Exchange Act. This information should be based on the registrant's current or most recent filing containing the related disclosure. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Indicates that the company is a smaller reporting company with both a public float and revenues of less than $75 million. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Trading symbol of an instrument as listed on an exchange. No definition available.
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- Definition Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Current portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Noncurrent portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable beyond one year (or the operating cycle, if longer). No definition available.
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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The amount of the general partner's ownership interest. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- References No definition available.
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- Definition The carrying value as of the balance sheet date of the noncurrent portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of accumulated depreciation, depletion, amortization and impairment of oil and gas property carried under the successful effort method. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Oil and Gas properties, gross, carried under the successful effort method. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Oil and gas properties net of accumulated depreciation, depletion, amortization, impairment, and abandonment, carried under the successful effort method. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of long-term debt classified as other, payable after one year or the operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The amount of ownership interest of different classes of partners in limited partnership. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of partners' capital (deficit), including portions attributable to both the parent and noncontrolling interests. Excludes temporary equity and is sometimes called permanent equity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed after one year or the normal operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount after depreciation of long-lived, physical assets used to produce goods and services and not intended for resale, classified as other. No definition available.
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- References No definition available.
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- Definition Carrying amount, attributable to parent, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer. No definition available.
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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) shares in Thousands, $ in Thousands |
Mar. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Oil and natural gas properties, unproved property costs | $ 1,084,737 | $ 1,063,884 |
| Other property and equipment accumulated depreciation and amortization | $ 0 | $ 14,433 |
| Series B Cumulative Convertible Preferred Units | ||
| Partners' equity, preferred units, outstanding (in shares) | 14,711 | 14,711 |
| Common Units | ||
| Partners' equity - units, outstanding (in shares) | 109,377 | 108,363 |
| Subordinated Units | ||
| Partners' equity - units, outstanding (in shares) | 96,329 | 96,329 |
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- Definition Capitalized costs of unproved properties incurred for any combination mineral interests acquisitions and other costs not previously disclosed within this table. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The number of each class of partnership units outstanding at the balance sheet date. Units represent shares of ownership of the general, limited, and preferred partners. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of accumulated depreciation of long-lived, physical assets used to produce goods and services and not intended for resale, classified as other. No definition available.
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- Definition The number of securities classified as temporary equity that have been issued and are held by the entity's shareholders. Securities outstanding equals securities issued minus securities held in treasury. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Distributable Preferred Stock Dividends No definition available.
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- Definition Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Exploration expenses (including prospecting) related to oil and gas producing entities and would be included in operating expenses of that entity. Costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of containing oil and gas reserves, including costs of drilling exploratory wells and exploratory-type stratigraphic test wells. Exploration costs may be incurred both before acquiring the related property (sometimes referred to in part as prospecting costs) and after acquiring the property. Principal types of exploration costs, which include depreciation and applicable operating costs of support equipment and facilities and other costs of exploration activities, are: (i) Costs of topographical, geographical and geophysical studies, rights of access to properties to conduct those studies, and salaries and other expenses of geologists, geophysical crews, and others conducting those studies. Collectively, these are sometimes referred to as geological and geophysical or "G&G" costs. (ii) Costs of carrying and retaining undeveloped properties, such as delay rentals, ad valorem taxes on properties, legal costs for title defense, and the maintenance of land and lease records. (iii) Dry hole contributions and bottom hole contributions. (iv) Costs of drilling and equipping exploratory wells. (v) Costs of drilling exploratory-type stratigraphic test wells. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, before tax, of income (loss) attributable to noncontrolling interest. Includes, but is not limited to, income (loss) from continuing operations, discontinued operations and equity method investments. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of the cost of borrowed funds accounted for as interest expense. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount after accretion (amortization) of discount (premium), and investment expense, of interest income and dividend income on nonoperating securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Aggregate amount of net income allocated to general partners. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Aggregate amount of net income allocated to limited partners. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Per unit of ownership amount after tax of income (loss) available to limited partnership (LP) unit-holder and units that would have been outstanding assuming the issuance of limited partner units for dilutive potential units outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Per unit of ownership amount after tax of income (loss) available to outstanding limited partnership (LP) unit-holder. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense. No definition available.
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- Definition The net result for the period of deducting operating expenses from operating revenues. No definition available.
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- References No definition available.
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- Definition Amount of operating lease expense. Excludes sublease income. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of income (expense) related to nonoperating activities, classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition A tax assessed on oil and gas production. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Dividends paid to preferred stock holders that is redeemable solely at the option of the issuer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Weighted average number of limited partnership units outstanding determined by relating the portion of time within a reporting period that limited partnership units have been outstanding to the total time in that period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Weighted average number of limited partnership units outstanding determined by relating the portion of time within a reporting period that limited partnership units have been outstanding to the total time in that period. Used in the calculation of diluted net income or loss per limited partnership unit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Charges on partners equity for accrued distribution equivalent rights. No definition available.
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- Definition Partners capital account restricted common units granted. No definition available.
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- Definition Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Decrease in noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Change in the different classes of partners' capital accounts during the year due to acquisitions. Partners include general, limited and preferred partners. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Total change in each class of partners' capital accounts during the year due to exchanges and conversions. Partners include general, limited and preferred partners. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Monetary value of the issuance of new units of limited partnership interest in a public offering. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Value of units that were previously issued and have been repurchased during the year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Total change in each class of partners' capital accounts during the year due to unit-based compensation. All partners include general, limited and preferred partners. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The number of each class of partnership units outstanding at the balance sheet date. Units represent shares of ownership of the general, limited, and preferred partners. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Change in the number of units for each class of partners' capital accounts during the year due to acquisitions. Partners include general, limited and preferred partners. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The number of units converted into shares of each class of partners' capital account. Units represent shares of ownership of the general, limited, and preferred partners. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The number of units sold in a public offering of each class of partners' capital account. Units represent shares of ownership of the general, limited, and preferred partners. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Units that were previously issued and have been repurchased during the year. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of partners' capital (deficit), including portions attributable to both the parent and noncontrolling interests. Excludes temporary equity and is sometimes called permanent equity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2019 |
Mar. 31, 2018 |
|
| CASH FLOWS FROM OPERATING ACTIVITIES | ||
| Net income (loss) | $ 9,017 | $ 41,957 |
| Adjustments to reconcile net income (loss) to net cash provided by operating activities: | ||
| Depreciation, depletion, and amortization | 27,833 | 28,570 |
| Accretion of asset retirement obligations | 277 | 269 |
| Amortization of deferred charges | 257 | 205 |
| (Gain) loss on commodity derivative instruments | 41,183 | 16,333 |
| Net cash (paid) received on settlement of commodity derivative instruments | 1,743 | (4,375) |
| Equity-based compensation | 9,223 | 6,226 |
| Exploratory dry hole expense | 4 | 0 |
| (Gain) loss on sale of assets, net | 0 | (2) |
| Changes in operating assets and liabilities: | ||
| Accounts receivable | 9,740 | (11,851) |
| Prepaid expenses and other current assets | (541) | (260) |
| Accounts payable, accrued liabilities, and other | (8,522) | (565) |
| Settlement of asset retirement obligations | (40) | (33) |
| NET CASH PROVIDED BY OPERATING ACTIVITIES | 90,174 | 76,474 |
| CASH FLOWS FROM INVESTING ACTIVITIES | ||
| Acquisitions of oil and natural gas properties | (19,946) | (32,154) |
| Additions to oil and natural gas properties | (31,633) | (46,250) |
| Additions to oil and natural gas properties leasehold costs | (234) | (524) |
| Purchases of other property and equipment | (2,036) | (5) |
| Proceeds from the sale of oil and natural gas properties | 2 | 752 |
| Proceeds from farmouts of oil and natural gas properties | 29,468 | 18,015 |
| NET CASH USED IN INVESTING ACTIVITIES | (24,379) | (60,166) |
| CASH FLOWS FROM FINANCING ACTIVITIES | ||
| Proceeds from issuance of common units, net of offering costs | (43) | 138 |
| Distributions to noncontrolling interests | 0 | (52) |
| Redemptions of Series A redeemable preferred units | 0 | (2,115) |
| Borrowings under credit facility | 98,000 | 105,000 |
| Repayments under credit facility | (73,000) | (57,000) |
| NET CASH USED IN FINANCING ACTIVITIES | (66,962) | (15,653) |
| NET CHANGE IN CASH AND CASH EQUIVALENTS | (1,167) | 655 |
| CASH AND CASH EQUIVALENTS – beginning of the period | 5,414 | 5,642 |
| CASH AND CASH EQUIVALENTS – end of the period | 4,247 | 6,297 |
| SUPPLEMENTAL DISCLOSURE | ||
| Interest paid | 5,197 | 4,326 |
| Common and Subordinated Units | ||
| CASH FLOWS FROM FINANCING ACTIVITIES | ||
| Distributions to unitholders | (75,917) | (52,493) |
| Repurchases of common and subordinated units | (10,752) | (8,441) |
| Preferred Units | ||
| CASH FLOWS FROM FINANCING ACTIVITIES | ||
| Distributions to unitholders | 0 | (690) |
| Series B cumulative convertible preferred units on an as-converted basis | Preferred Units | ||
| CASH FLOWS FROM FINANCING ACTIVITIES | ||
| Distributions to unitholders | $ (5,250) | $ 0 |
| X | ||||||||||
- Definition The net cash outflow or inflow from derivative instruments during the period No definition available.
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| X | ||||||||||
- Definition Payments for redemptions of redeemable preferred units. No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition The cash inflow from the issuance of common limited partners units net of offering costs and expenses during the period. No definition available.
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition The amount of amortization of deferred charges applied against earnings during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of accretion expense recognized during the period that is associated with an asset retirement obligation. Accretion expense measures and incorporates changes due to the passage of time into the carrying amount of the liability. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of expense for capitalized exploratory well costs for which proved reserves were not found at the exploratory well. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes. No definition available.
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| X | ||||||||||
- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of cash distribution paid to unit-holder of limited partnership (LP). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The increase (decrease) during the reporting period in the amounts payable to vendors for goods and services received and the amount of obligations and expenses incurred but not paid. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The increase (decrease) during the reporting period in the carrying amount of asset retirement obligations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of increase (decrease) in prepaid expenses, and assets classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of cash outflow for costs that are essential to originate the lease and would not otherwise have been incurred without the lease agreement. Amount includes, but is not limited to, cash outflows to evaluate the lessee's credit condition, guarantees, and collateral and cash outflows for costs incurred in negotiating, processing, and executing the lease agreement. No definition available.
|
| X | ||||||||||
- Definition The cash outflow to reacquire common and preferred stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of cash outflow in the form of ordinary dividends provided by the non-wholly owned subsidiary to noncontrolling interests. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The cash outflow for acquisition of furniture and fixtures. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The cash outflow to purchase of mineral interests in oil and gas properties for use in the normal oil and gas operations and not intended for resale. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The cash outflow for exploration and development of oil and gas properties. It includes cash payments related to development of oil and gas wells drilled at previously untested geologic structures (to determine the presence of oil or gas) and wells drilled at sites where the presence of oil or gas has already been established (to extract the oil or gas). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The net cash inflow or cash outflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with either short term or long term maturity that is collateralized (backed by pledge, mortgage or other lien in the entity's assets). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition The cash inflow to dispose of long-lived, physical assets and mineral interests in oil and gas properties used for normal oil and gas operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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Business and Basis of Presentation |
3 Months Ended |
|---|---|
Mar. 31, 2019 | |
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |
| Business and Basis of Presentation | BUSINESS AND BASIS OF PRESENTATION Description of the Business Black Stone Minerals, L.P. (“BSM” or the “Partnership”) is a publicly traded Delaware limited partnership that owns oil and natural gas mineral interests, which make up the vast majority of the asset base. The Partnership's assets also include nonparticipating royalty interests and overriding royalty interests. These interests, which are substantially non-cost-bearing, are collectively referred to as “mineral and royalty interests.” The Partnership’s mineral and royalty interests are located in 41 states in the continental United States, including all of the major onshore producing basins. The Partnership also owns non-operated working interests in certain oil and natural gas properties. The Partnership's common units trade on the New York Stock Exchange under the symbol "BSM." Basis of Presentation The accompanying unaudited interim consolidated financial statements of the Partnership have been prepared in accordance with generally accepted accounting principles ("GAAP") in the United States and pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”). These unaudited interim consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and, therefore, do not include all disclosures required for financial statements prepared in conformity with GAAP. Accordingly, the accompanying unaudited interim consolidated financial statements and related notes should be read in conjunction with the Partnership’s consolidated financial statements included in the Partnership’s 2018 Annual Report on Form 10-K. The consolidated financial statements include the consolidated results of the Partnership. The results of operations for the three months ended March 31, 2019 are not necessarily indicative of the results to be expected for the full year. In the opinion of management, all adjustments, which are of a normal and recurring nature, necessary for the fair presentation of the financial results for all periods presented have been reflected. All intercompany balances and transactions have been eliminated. The Partnership evaluates the significant terms of its investments to determine the method of accounting to be applied to each respective investment. Investments in which the Partnership has less than a 20% ownership interest and does not have control or exercise significant influence are accounted for using fair value or cost minus impairment if fair value is not readily determinable. Investments in which the Partnership exercises control are consolidated, and the noncontrolling interests of such investments, which are not attributable directly or indirectly to the Partnership, are presented as a separate component of net income and equity in the accompanying consolidated financial statements. The unaudited interim consolidated financial statements include undivided interests in oil and natural gas property rights. The Partnership accounts for its share of oil and natural gas property rights by reporting its proportionate share of assets, liabilities, revenues, costs, and cash flows within the relevant lines on the accompanying unaudited interim consolidated balance sheets, statements of operations, and statements of cash flows. Segment Reporting The Partnership operates in a single operating and reportable segment. Operating segments are defined as components of an enterprise for which separate financial information is evaluated regularly by the chief operating decision maker in deciding how to allocate resources and assess performance. The Partnership’s chief executive officer has been determined to be the chief operating decision maker and allocates resources and assesses performance based upon financial information at the consolidated level. |
| X | ||||||||||
- Definition The entire disclosure for the business description and basis of presentation concepts. Business description describes the nature and type of organization including but not limited to organizational structure as may be applicable to holding companies, parent and subsidiary relationships, business divisions, business units, business segments, affiliates and information about significant ownership of the reporting entity. Basis of presentation describes the underlying basis used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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Summary of Significant Accounting Policies |
3 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mar. 31, 2019 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accounting Policies [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary of Significant Accounting Policies | SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies Significant accounting policies are disclosed in the Partnership’s Annual Report on Form 10-K for the year ended December 31, 2018. There have been no changes in such policies or the application of such policies during the three months ended March 31, 2019, with the exception of ASC 842, as defined below. Accounts Receivable The following table presents information about the Partnership's accounts receivable:
Recent Accounting Pronouncements In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2016-02, Leases (Topic 842), that supersedes Accounting Standards Codification ("ASC") 840, Leases by requiring lessees to recognize lease assets and lease liabilities classified as operating leases on the balance sheet. See Note 3 - Impact of ASC 842 Adoption for further details related to the Partnership's adoption of this standard. In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820), which will remove, modify, and add certain required disclosures on fair value measurements. As amended, Topic 820 will no longer require the disclosure of the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, the policy of timing of transfers between levels, and the valuation processes for Level 3 fair value measurements. In addition, certain modifications to current disclosure requirements will be made, including clarifying that the measurement uncertainty disclosure is to communicate information about the uncertainty in measurement as of the reporting date. Certain disclosure requirements will also be added, including the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. For certain unobservable inputs, an entity may disclose other quantitative information in place of the weighted average if the entity determines that other quantitative information would be a more reasonable and rational method to reflect the distribution of unobservable inputs used to develop Level 3 fair value measurements. The new standard will be effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, and early adoption is permitted. The Partnership does not plan to early adopt and is evaluating the impact that the new accounting guidance will have on its consolidated financial statements and related disclosures. |
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- References No definition available.
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- Definition The entire disclosure for all significant accounting policies of the reporting entity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Impact of ASC 842 Adoption |
3 Months Ended |
|---|---|
Mar. 31, 2019 | |
| Leases [Abstract] | |
| Impact of ASC 606 Adoption | IMPACT OF ASC 842 ADOPTION Leases On January 1, 2019, the Partnership adopted ASU 2016-02, Leases (Topic 842) using the modified retrospective method. This ASU requires the recognition of lease assets and lease liabilities by lessees for those leases classified as operating leases under the previous guidance. The Partnership used January 1, 2019, the beginning of the period of adoption, as its date of initial application. The Partnership elected the package of practical expedients upon transition which will retain the lease classification for leases and any unamortized initial direct costs that existed prior to the adoption of the standard. The adoption of the standard resulted in the recognition of operating lease right-of-use (“ROU”) assets and operating lease liabilities on the consolidated balance sheet as of January 1, 2019. ROU assets and operating lease liabilities were less than 1% of the Partnership's total assets as of March 31, 2019 and were not considered material to the Partnership. There was no related impact on the consolidated statement of operations. The standard had no impact on the Partnership’s debt covenant compliance under existing agreements. The Partnership determines if an arrangement is a lease at inception by considering whether (1) explicitly or implicitly identified assets have been deployed in the agreement and (2) the Partnership obtains substantially all of the economic benefits from the use of that underlying asset and directs how and for what purpose the asset is used during the term of the agreement. Operating leases are included in Deferred charges and other long-term assets, Other current liabilities, and Other long-term liabilities in the consolidated balance sheets. As of March 31, 2019, none of the Partnership’s leases were classified as financing leases. ROU assets represent the Partnership’s right to use an underlying asset for the lease term and operating lease liabilities represent the Partnership’s obligation to make lease payments arising from the lease. ROU assets are recognized at commencement date and consist of the present value of remaining lease payments over the lease term, initial direct costs, prepaid lease payments less any lease incentives. Operating lease liabilities are recognized at commencement date based on the present value of remaining lease payments over the lease term. The Partnership uses the implicit rate, when readily determinable, or its incremental borrowing rate based on the information available at commencement date to determine the present value of lease payments. The lease terms may include periods covered by options to extend the lease when it is reasonably certain that the Partnership will exercise that option and periods covered by options to terminate the lease when it is not reasonably certain that the Partnership will exercise that option. Lease expense for lease payments is recognized on a straight-line basis over the lease term. The Partnership made an accounting policy election to not recognize leases with terms of less than twelve months on the consolidated balance sheets and recognize those lease payments in the consolidated statements of operations on a straight-line basis over the lease term. In the event that the Partnership’s assumptions and expectations change, it may have to revise its ROU assets and operating lease liabilities. |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
Oil and Natural Gas Properties Acquisitions |
3 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Mar. 31, 2019 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Business Combinations [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Oil and Natural Gas Properties Acquisitions | OIL AND NATURAL GAS PROPERTIES ACQUISITIONS Acquisitions of proved oil and natural gas properties and working interests are considered business combinations and are recorded at their estimated fair value as of the acquisition date. Acquisitions of unproved oil and natural gas properties are considered asset acquisitions and are recorded at cost. 2019 Acquisitions During the three months ended March 31, 2019, the Partnership closed on multiple acquisitions of mineral and royalty interests for total consideration of $20.9 million. Acquisitions that included proved oil and natural gas properties were considered business combinations and were primarily located in the Permian Basin. These acquisitions were funded with borrowings under the Credit Facility (as defined in Note 7 - Credit Facility) and funds from operating activities. Acquisition related costs of less than $0.1 million were expensed and included in the General and administrative expense line item of the consolidated statement of operations for the three months ended March 31, 2019. The following table summarizes these acquisitions which were considered business combinations:
In addition, during the three months ended March 31, 2019, the Partnership acquired mineral and royalty interests in unproved oil and natural gas properties from various sellers for an aggregate of $12.3 million. These acquisitions were considered asset acquisitions and were primarily located in East Texas. The cash portion of the consideration paid for these acquisitions of $11.4 million was funded with borrowings under the Credit Facility and funds from operating activities, and $0.9 million was funded through the issuance of common units of the Partnership based on the fair values of the common units issued on the acquisition dates. 2018 Acquisitions During the year ended December 31, 2018, the Partnership closed on multiple acquisitions of mineral and royalty interests for total consideration of $149.9 million. Acquisitions that included proved oil and natural gas properties were considered business combinations and were primarily located in the Permian Basin. The cash portion of the consideration paid for these acquisitions was funded with borrowings under the Credit Facility and funds from operating activities. Acquisition related costs of $0.2 million were expensed and included in the General and administrative expense line item of the consolidated statement of operations for the year ended December 31, 2018. The following table summarizes these acquisitions which were considered business combinations:
In addition, during 2018, the Partnership acquired mineral and royalty interests in unproved oil and natural gas properties from various sellers for an aggregate of $58.2 million. These acquisitions were considered asset acquisitions and were primarily located in East Texas and the Permian Basin. The cash portion of the consideration paid for these acquisitions of $57.6 million was funded with borrowings under the Credit Facility and funds from operating activities, and $0.6 million was funded through the issuance of common units of the Partnership based on the fair values of the common units issued on the acquisition dates. During 2018, the Partnership acquired the remaining noncontrolling interest in certain subsidiaries for $1.7 million in cash and merged the subsidiaries into its existing structure. Farmout Agreements Canaan Farmout On February 21, 2017, the Partnership announced that it had entered into a farmout agreement with Canaan Resource Partners ("Canaan") which covers certain Haynesville and Bossier shale acreage in San Augustine County, Texas operated by XTO Energy Inc., a subsidiary of Exxon Mobil Corporation. The Partnership has an approximate 50% working interest in the acreage and is the largest mineral owner. A total of 20 wells were drilled over an initial phase, beginning with wells spud after January 1, 2017. Canaan has elected to participate in an additional phase that began in September 2018 and will continue for the lesser of 2 years or until 20 wells have been drilled. After the completion of the second phase, Canaan will have the option to elect to participate in a similar third phase. During the first three phases of the agreement, Canaan commits on a phase-by-phase basis and funds 80% of the Partnership's drilling and completion costs and is assigned 80% of the Partnership's working interests in such wells (40% working interest on an 8/8ths basis) as the wells are drilled. After the third phase, Canaan can earn 40% of the Partnership’s working interest (20% working interest on an 8/8ths basis) in additional wells drilled in the area by continuing to fund 40% of the Partnership's costs for those wells on a well-by-well basis. The Partnership will receive an overriding royalty interest (“ORRI”) before payout and an increased ORRI after payout on all wells drilled under the agreement. From the inception of the agreement through March 31, 2019, the Partnership has received $86.4 million from Canaan under the agreement. As of March 31, 2019, the Partnership had assigned to Canaan working interests in certain wells drilled and completed, and as such, $8.9 million of the farmout reimbursements received from Canaan are included in the Other long-term liabilities line item of the consolidated balance sheet. Pivotal Farmout On November 21, 2017, the Partnership entered into a farmout agreement with Pivotal Petroleum Partners (“Pivotal”), a portfolio company of Tailwater Capital, LLC. The farmout agreement covers substantially all of the Partnership's remaining working interests under active development in the Shelby Trough area of East Texas, targeting the Haynesville and Bossier shale acreage (after giving effect to the Canaan Farmout), until November 2025. In wells operated by XTO Energy Inc. in San Augustine County, Texas, Pivotal will earn the Partnership's remaining working interest not covered by the Canaan Farmout (10% working interest on an 8/8th basis), as well as 100% of the Partnership's working interests (ranging from approximately 12.5% to 25% on an 8/8ths basis) in wells operated by its other major operator in San Augustine and Angelina counties, Texas. Initially, Pivotal is obligated to fund the development of up to 80 wells across several development areas and then has options to continue funding the Partnership's working interest across those areas for the duration of the farmout agreement. Pivotal will fund designated groups of wells. Once Pivotal achieves a specified payout for a designated well group, the Partnership will obtain a majority of the original working interest in such well group. From the inception of the agreement through March 31, 2019, the Partnership received $86.8 million from Pivotal under the agreement. As of March 31, 2019, the Partnership had assigned to Pivotal working interests in certain wells drilled and completed, and as such, $63.1 million of the farmout reimbursements received from Pivotal are included in the Other long-term liabilities line item of the consolidated balance sheet. As of December 31, 2018, $11.6 million and $41.2 million were included in the Other long-term liabilities line item of the consolidated balance sheet related to the farmout agreements with Canaan and Pivotal, respectively. |
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- Definition The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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Commodity Derivative Financial Instruments |
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| Derivative Instruments and Hedging Activities Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commodity Derivatives And Financial Instruments | COMMODITY DERIVATIVE FINANCIAL INSTRUMENTS The Partnership’s ongoing operations expose it to changes in the market price for oil and natural gas. To mitigate the inherent commodity price risk associated with its operations, the Partnership uses oil and natural gas commodity derivative financial instruments. From time to time, such instruments may include variable-to-fixed-price swaps, costless collars, fixed-price contracts and other contractual arrangements. The Partnership enters into oil and natural gas derivative contracts that contain netting arrangements with each counterparty. The Partnership does not enter into derivative instruments for speculative purposes. As of March 31, 2019, the Partnership’s open derivative contracts consisted of fixed-price swap contracts and costless collar contracts. A fixed-price swap contract between the Partnership and the counterparty specifies a fixed commodity price and a future settlement date. A costless collar contract between the Partnership and the counterparty specifies a floor and a ceiling commodity price and a future settlement date. The Partnership has not designated any of its contracts as fair value or cash flow hedges. Accordingly, the changes in the fair value of the contracts are included in the consolidated statement of operations in the period of the change. All derivative gains and losses from the Partnership’s derivative contracts have been recognized in revenue in the Partnership's accompanying consolidated statements of operations. Derivative instruments that have not yet been settled in cash are reflected as either derivative assets or liabilities in the Partnership’s accompanying consolidated balance sheets as of March 31, 2019 and December 31, 2018. See Note 6 – Fair Value Measurements for further discussion. The Partnership's derivative contracts expose it to credit risk in the event of nonperformance by counterparties that may adversely impact the fair value of the Partnership's commodity derivative assets. While the Partnership does not require its derivative contract counterparties to post collateral, the Partnership does evaluate the credit standing of such counterparties as deemed appropriate. This evaluation includes reviewing a counterparty’s credit rating and latest financial information. As of March 31, 2019, the Partnership had nine counterparties, all of which are rated Baa1 or better by Moody’s and are lenders under the Credit Facility. The tables below summarize the fair values and classifications of the Partnership’s derivative instruments, as well as the gross recognized derivative assets, liabilities, and amounts offset in the consolidated balance sheets as of each date:
Changes in the fair values of the Partnership’s derivative instruments (both assets and liabilities) are presented on a net basis in the accompanying consolidated statements of operations and consolidated statements of cash flows and consist of the following for the periods presented:
The Partnership had the following open derivative contracts for oil as of March 31, 2019:
The Partnership had the following open derivative contracts for natural gas as of March 31, 2019:
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- References No definition available.
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- Definition The entire disclosure for derivatives and fair value of assets and liabilities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Fair Value Measurements |
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| Fair Value Disclosures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value Measurements | FAIR VALUE MEASUREMENTS Fair value is defined as the amount at which an asset (or liability) could be bought (or incurred) or sold (or settled) in an orderly transaction between market participants at the measurement date. Further, ASC 820, Fair Value Measurement, establishes a framework for measuring fair value, establishes a fair value hierarchy based on the quality of inputs used to measure fair value, and includes certain disclosure requirements. Fair value estimates are based on either (i) actual market data or (ii) assumptions that other market participants would use in pricing an asset or liability, including estimates of risk. ASC 820 establishes a three-level valuation hierarchy for disclosure of fair value measurements. The valuation hierarchy categorizes assets and liabilities measured at fair value into one of three different levels depending on the observability of the inputs employed in the measurement. The three levels are defined as follows: Level 1—Unadjusted quoted prices for identical assets or liabilities in active markets. Level 2—Quoted prices for similar assets or liabilities in non-active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument. Level 3—Inputs that are unobservable and significant to the fair value measurement (including the Partnership’s own assumptions in determining fair value). A financial instrument’s categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The Partnership’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability. There were no transfers into, or out of, the three levels of the fair value hierarchy for the three months ended March 31, 2019 or the year ended December 31, 2018. The carrying value of the Partnership's cash and cash equivalents, receivables, and payables approximate fair value due to the short-term nature of the instruments. The estimated carrying value of all debt as of March 31, 2019 and December 31, 2018 approximated the fair value due to variable market rates of interest. These debt fair values, which are Level 3 measurements, were estimated based on the Partnership’s incremental borrowing rates for similar types of borrowing arrangements, when quoted market prices were not available. The estimated fair values of the Partnership’s financial instruments are not necessarily indicative of the amounts that would be realized in a current market exchange. Assets and Liabilities Measured at Fair Value on a Recurring Basis The Partnership estimated the fair value of derivative instruments using the market approach via a model that uses inputs that are observable in the market or can be derived from, or corroborated by, observable data. See Note 5 – Commodity Derivative Financial Instruments for further discussion. The following table presents information about the Partnership’s assets and liabilities measured at fair value on a recurring basis:
Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis Nonfinancial assets and liabilities measured at fair value on a non-recurring basis include certain nonfinancial assets and liabilities as may be acquired in a business combination and measurements of oil and natural gas property values for assessment of impairment. The determination of the fair values of proved and unproved properties acquired in business combinations are estimated by discounting projected future cash flows. The factors used to determine fair value include estimates of economic reserves, future operating and development costs, future commodity prices, timing of future production, and a risk-adjusted discount rate. The Partnership has designated these measurements as Level 3. The Partnership’s fair value assessments for recent acquisitions are included in Note 4 – Oil and Natural Gas Properties Acquisitions. Oil and natural gas properties are measured at fair value on a non-recurring basis using the income approach when assessing for impairment. Proved and unproved oil and natural gas properties are reviewed for impairment when events and circumstances indicate a possible decline in the recoverability of the carrying value of those properties. When assessing producing properties for impairment, the Partnership compares the expected undiscounted projected future cash flows of the producing properties to the carrying amount of the producing properties to determine recoverability. When the carrying amount exceeds its estimated undiscounted future cash flows, the carrying amount is written down to its fair value, which is measured as the present value of the projected future cash flows of such properties. The factors used to determine fair value include estimates of proved reserves, future commodity prices, timing of future production, future capital expenditures, and a risk-adjusted discount rate. The Partnership’s estimates of fair value have been determined at discrete points in time based on relevant market data. These estimates involve uncertainty and cannot be determined with precision. There were no significant changes in valuation techniques or related inputs as of March 31, 2019 or December 31, 2018. There were no assets measured at fair value on a non-recurring basis, after initial recognition, for the three months ended March 31, 2019 and 2018. |
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- References No definition available.
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| X | ||||||||||
- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Credit Facility |
3 Months Ended |
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Mar. 31, 2019 | |
| Debt Disclosure [Abstract] | |
| Credit Facility | CREDIT FACILITY The Partnership maintains a senior secured revolving credit agreement, as amended (the “Credit Facility”). The Credit Facility has an aggregate maximum credit amount of $1.0 billion and terminates on November 1, 2022. The commitment of the lenders equals the lesser of the aggregate maximum credit amount and the borrowing base. The amount of the borrowing base is redetermined semi-annually, usually in October and April, and is derived from the value of the Partnership’s oil and natural gas properties as determined by the lender syndicate using pricing assumptions that often differ from the current market for future prices. Effective May 4, 2018, the borrowing base redetermination increased the borrowing base from $550.0 million to $600.0 million and, effective October 31, 2018, the borrowing base was further increased to $675.0 million. Outstanding borrowings under the Credit Facility bear interest at a floating rate elected by the Partnership equal to an alternative base rate (which is equal to the greatest of the Prime Rate, the Federal Funds effective rate plus 0.50%, or 1-month LIBOR plus 1.00%) or LIBOR, in each case, plus the applicable margin. Prior to October 31, 2018, the applicable margin ranged from 1.00% to 2.00% in the case of the alternative base rate and from 2.00% to 3.00% in the case of LIBOR, depending on the borrowings outstanding in relation to the borrowing base. Effective October 31, 2018, the applicable margin for the alternative base rate was reduced to between 0.75% and 1.75% and the applicable margin for LIBOR was reduced to between 1.75% and 2.75%. The weighted-average interest rate of the Credit Facility was 4.75% and 4.76% as of March 31, 2019 and December 31, 2018, respectively. Accrued interest is payable at the end of each calendar quarter or at the end of each interest period, unless the interest period is longer than 90 days, in which case interest is payable at the end of every 90-day period. In addition, a commitment fee is payable at the end of each calendar quarter based on either a rate of 0.375% if the borrowing base utilization percentage is less than 50%, or 0.500% if the borrowing base utilization percentage is equal to or greater than 50%. The Credit Facility is secured by substantially all of the Partnership’s oil and natural gas production and assets. The Credit Facility contains various limitations on future borrowings, leases, hedging, and sales of assets. Additionally, the Credit Facility requires the Partnership to maintain a current ratio of not less than 1.0:1.0 and a ratio of total debt to EBITDAX (Earnings before Interest, Taxes, Depreciation, Amortization, and Exploration) of not more than 3.5:1.0. As of March 31, 2019, the Partnership was in compliance with all financial covenants in the Credit Facility. The aggregate principal balance outstanding was $435.0 million and $410.0 million at March 31, 2019 and December 31, 2018, respectively. The unused portion of the available borrowings under the Credit Facility were $240.0 million and $265.0 million at March 31, 2019 and December 31, 2018, respectively. |
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- References No definition available.
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- Definition The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Commitments and Contingencies |
3 Months Ended |
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Mar. 31, 2019 | |
| Commitments and Contingencies Disclosure [Abstract] | |
| Commitments and Contingencies | COMMITMENTS AND CONTINGENCIES Environmental Matters The Partnership’s business includes activities that are subject to U.S. federal, state, and local environmental regulations with regard to air, land, and water quality and other environmental matters. The Partnership does not consider the potential remediation costs that could result from issues identified in any environmental site assessments to be significant to the consolidated financial statements, and no provision for potential remediation costs has been recorded. Put Option Related to Noble Acquisition By acquiring 100% of the issued and outstanding securities of Samedan Royalty, LLC, now NAMP Holdings, LLC, on November 28, 2017 from Noble Energy US Holdings, LLC, the Partnership acquired a 100% interest in Comin-Temin, LLC, now NAMP GP, LLC ("Holdings"), Comin 1989 Partnership LLLP, now NAMP 1, LP ("Comin"), and Temin 1987 Partnership LLLP, now NAMP 2, LP ("Temin"). Pursuant to certain co-ownership agreements, various co-owners hold undivided beneficial ownership interests in 45.33% and 42.63% of the minerals interests held of record by Holdings and Temin, respectively. Based on the terms of the co-ownership agreements, the co-owners each have an unconditional option to require Comin or Temin, as applicable, to purchase their beneficial ownership interest in the mineral interests held of record by Holdings or Temin, as applicable, at any time within 30 days of receiving such repurchase notice. The purchase price of the beneficial ownership interest shall be based on an evaluation performed by Comin or Temin, as applicable, in good faith. As of March 31, 2019, the Partnership had not received notice from any co-owner to exercise their repurchase option, and as such, no liability was recorded. Litigation From time to time, the Partnership is involved in legal actions and claims arising in the ordinary course of business. The Partnership believes existing claims as of March 31, 2019 will be resolved without material adverse effect on the Partnership’s financial condition or operations. |
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- References No definition available.
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- Definition The entire disclosure for commitments and contingencies. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Incentive Compensation |
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| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Incentive Compensation | INCENTIVE COMPENSATION The table below summarizes incentive compensation expense recorded in general and administrative expenses in the consolidated statements of operations for the three months ended March 31, 2019 and 2018:
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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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Preferred Units |
3 Months Ended |
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Mar. 31, 2019 | |
| Equity [Abstract] | |
| Redeemable Preferred Units | PREFERRED UNITS Series A Redeemable Preferred Units As of March 31, 2019 and December 31, 2018, there were no Series A redeemable preferred units outstanding. The Series A redeemable preferred units were entitled to an annual distribution of 10% of the outstanding funded capital of the Series A redeemable preferred units, payable on a quarterly basis in arrears. The Series A redeemable preferred units were convertible into common and subordinated units at any time at the option of the Series A redeemable preferred unitholders. The Series A redeemable preferred units had an adjusted conversion price of $14.2683 and an adjusted conversion rate of 30.3431 common units and 39.7427 subordinated units per redeemable preferred unit. The Series A redeemable preferred unitholders had the option to elect to have the Partnership redeem, at face value, all remaining Series A redeemable preferred units, effective as of December 31, 2017, plus any accrued and unpaid distributions. All Series A redeemable preferred units not redeemed by March 31, 2018 automatically converted to common and subordinated units effective as of January 1, 2018 or as soon as practicable thereafter. For the three months ended March 31, 2018, 2,115 Series A redeemable preferred units were redeemed for $2.1 million, including accrued unpaid yield, and 24,248 Series A redeemable preferred units totaling $24.2 million were converted into 735,758 common units and 963,681 subordinated units as a result of the mandatory conversion subsequent to December 31, 2017. Series B Cumulative Convertible Preferred Units On November 28, 2017, the Partnership issued and sold in a private placement 14,711,219 Series B cumulative convertible preferred units representing limited partner interests in the Partnership for a cash purchase price of $20.3926 per Series B cumulative convertible preferred unit, resulting in total proceeds of approximately $300.0 million. The Series B cumulative convertible preferred units are entitled to an annual distribution of 7%, payable on a quarterly basis in arrears. For the eight quarters consisting of the quarter in respect of which the initial distribution is paid and the seven full quarters thereafter, the quarterly distribution may be paid, at the sole option of the Partnership, (i) in-kind in the form of additional Series B cumulative convertible preferred units (the "Series B PIK Units"), (ii) in cash, or (iii) in a combination of Series B PIK Units and cash. Beginning with the ninth quarter, all Series B cumulative convertible preferred unit distributions shall be paid in cash. The number of Series B PIK Units to be issued, if any, shall equal the quotient of the Series B cumulative convertible preferred unit distribution amount (or portion thereof) divided by the Series B cumulative convertible preferred unit purchase price of $20.3926. The Series B cumulative convertible preferred units are convertible into common units of the Partnership on November 29, 2019 and once per quarter thereafter. At such time, the Series B cumulative convertible preferred units may be converted by each holder at its option, in whole or in part, into common units on a one-for-one basis at the purchase price of $20.3926, adjusted to give effect to any accrued but unpaid accumulated distributions on the applicable Series B cumulative convertible preferred units through the most recent declaration date. However, the Partnership shall not be obligated to honor any request for such conversion if such request does not involve an underlying value of common units of at least $10.0 million based on the closing trading price of common units on the trading day immediately preceding the conversion notice date, or such lesser amount to the extent such exercise covers all of a holder's Series B cumulative convertible preferred units. The Series B cumulative convertible preferred units had a carrying value of $298.4 million and $298.4 million, including accrued distributions of $5.3 million and $5.3 million, as of March 31, 2019 and December 31, 2018, respectively. The Series B cumulative convertible preferred units are classified as mezzanine equity on the consolidated balance sheets since certain provisions of redemption are outside the control of the Partnership. |
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- References No definition available.
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- Definition The entire disclosure for terms, amounts, nature of changes, rights and privileges, dividends, and other matters related to preferred stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Earnings Per Unit |
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| Earnings Per Share [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Earnings Per Unit | EARNINGS PER UNIT The Partnership applies the two-class method for purposes of calculating earnings per unit (“EPU”). The holders of the Partnership’s restricted common and subordinated units have all the rights of a unitholder, including non-forfeitable distribution rights. As participating securities, the restricted common and subordinated units are included in the calculation of basic earnings per unit. For the periods presented, the amount of earnings allocated to these participating units was not material. Net income (loss) attributable to the Partnership is allocated to the Partnership’s general partner and the common and subordinated unitholders in proportion to their pro rata ownership after giving effect to distributions, if any, declared during the period. The Partnership’s restricted performance unit awards are contingently issuable units that are considered in the calculation of diluted EPU. The Partnership assesses the number of units that would be issuable, if any, under the terms of the arrangement if the end of the reporting period were the end of the contingency period. At March 31, 2019 and 2018, there were 0.6 million and 0.1 million units, respectively, related to the Partnership’s restricted performance unit awards included in the calculation of diluted EPU. The following table sets forth the computation of basic and diluted earnings per common and subordinated unit:
The following units of potentially dilutive securities were excluded from the computation of diluted weighted average units outstanding because their inclusion would be anti-dilutive:
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- References No definition available.
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- Definition The entire disclosure for earnings per share. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Common and Subordinated Units |
3 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Mar. 31, 2019 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Common and Subordinated Units | COMMON AND SUBORDINATED UNITS Common and Subordinated Units The common units and subordinated units represent limited partner interests in the Partnership. The partnership agreement restricts unitholders’ voting rights by providing that any units held by a person or group that owns 15% or more of any class of units then outstanding other than the limited partners in Black Stone Minerals Company, L.P. prior to the initial public offering of BSM, their transferees, persons who acquired such units with the prior approval of the board of directors of the Partnership's general partner (the "Board"), holders of Series B cumulative convertible preferred units in connection with any vote, consent or approval of the Series B cumulative convertible preferred units as a separate class, and persons who own 15% or more of any class as a result of any redemption or purchase of any other person's units or similar action by the Partnership or any conversion of the Series B cumulative convertible preferred units at the Partnership's option or in connection with a change of control may not vote on any matter. The holders of common units and subordinated units are entitled to participate in distributions and exercise the rights and privileges provided to limited partners holding common units and subordinated units under the partnership agreement. The partnership agreement generally provides that any distributions will be paid each quarter during the subordination period (as defined in the partnership agreement) in the following manner: • first, to the holders of the Series B cumulative convertible preferred units in an amount equal to 7% per annum, subject to certain adjustments; • second, to the holders of common units, until each common unit has received the applicable minimum quarterly distribution plus any arrearages from prior quarters; and • third, to the holders of subordinated units, until each subordinated unit has received the applicable minimum quarterly distribution. If the distributions to common and subordinated unitholders exceed the applicable minimum quarterly distribution per unit, then such excess amounts will be distributed pro rata on the common and subordinated units as if they were a single class. The priority right of the common unitholders will cease to exist upon full conversion of the subordinated units to common units. The following table provides information about the Partnership's per unit distributions to common and subordinated unitholders:
End of the Subordination Period The subordination period under the partnership agreement will end on the first business day after the Partnership has earned and paid an aggregate amount of at least $1.35 (the annualized minimum quarterly distribution applicable for quarterly periods ending March 31, 2019 and thereafter) multiplied by the total number of outstanding common and subordinated units for a period of four consecutive, non-overlapping quarters ending on or after March 31, 2019, and there are no outstanding arrearages on the common units. When the subordination period ends as a result of the Partnership having met the test described above, all subordinated units will convert into common units on a one-to-one basis, and common units will thereafter no longer be entitled to arrearages. Common Unit Repurchase Program On November 5, 2018, the Board authorized the repurchase of up to $75.0 million in common units. The repurchase program authorizes the Partnership to make repurchases on a discretionary basis as determined by management, subject to market conditions, applicable legal requirements, available liquidity, and other appropriate factors. The Partnership made no repurchases under this program for the three months ended March 31, 2019. The repurchase program is funded from the Partnership's cash on hand or availability on the Credit Facility. Any repurchased units are canceled. At-The-Market Offering Program On May 26, 2017, the Partnership commenced an at-the-market offering program (the “ATM Program”) and in connection therewith entered into an Equity Distribution Agreement with Wells Fargo Securities, LLC, Merrill Lynch, Pierce, Fenner & Smith Incorporated, and UBS Securities LLC, as Sales Agents (each a “Sales Agent” and collectively the “Sales Agents”). Pursuant to the terms of the ATM Program, the Partnership may sell, from time to time through the Sales Agents, the Partnership’s common units representing limited partner interests having an aggregate offering amount of up to $100,000,000. Sales of common units, if any, may be made in negotiated transactions or transactions that are deemed to be “at the market” offerings as defined in Rule 415 under the Securities Act of 1933, as amended (the “Securities Act”), including sales made directly on the New York Stock Exchange or sales made to or through a market maker other than on an exchange. Under the terms of the ATM Program, the Partnership may also sell common units to one or more of the Sales Agents as principal for its own account at a price to be agreed upon at the time of sale. Any sale of common units to a Sales Agent as principal would be pursuant to the terms of a separate agreement between the Partnership and such Sales Agent. The Partnership intends to use the net proceeds from any sales pursuant to the ATM Program, after deducting the Sales Agents’ commissions and the Partnership’s offering expenses, for general partnership purposes, which may include, among other things, repayment of indebtedness outstanding under the Partnership’s Credit Facility. Common units sold pursuant to the Equity Distribution Agreement are offered and sold pursuant to the Partnership’s existing effective shelf-registration statement on Form S-3 (File No. 333-215857), which was declared effective by the SEC on February 8, 2017. The Equity Distribution Agreement contains customary representations, warranties and agreements, indemnification obligations, including for liabilities under the Securities Act, other obligations of the parties and termination provisions. For the three months ended March 31, 2019, the Partnership sold no common units under the ATM Program. For the three months ended March 31, 2018, the Partnership sold 8,204 common units under the ATM program for net proceeds of $0.1 million. As of March 31, 2019, the Partnership has raised net proceeds of $73.0 million under the ATM Program. |
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- References No definition available.
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- Definition The entire disclosure for treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Subsequent Events |
3 Months Ended |
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Mar. 31, 2019 | |
| Subsequent Events [Abstract] | |
| Subsequent Events | SUBSEQUENT EVENTS On April 25, 2019, the Board approved a distribution for the three months ended March 31, 2019 of $0.37 per common unit and $0.37 per subordinated unit. Distributions will be payable on May 23, 2019 to unitholders of record at the close of business on May 16, 2019. The Board also confirmed and approved that, upon payment of the distribution for the three months ended March 31, 2019, the tests required for conversion of all of the outstanding subordinated units into common units on a one-for-one basis will be met. Accordingly, on the first business day following the payment of the distribution described, the Partnership's 96,328,836 subordinated units will convert into 96,328,836 common units. |
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- References No definition available.
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| X | ||||||||||
- Definition The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Summary of Significant Accounting Policies (Policies) |
3 Months Ended |
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Mar. 31, 2019 | |
| Accounting Policies [Abstract] | |
| Basis of Presentation | Basis of Presentation The accompanying unaudited interim consolidated financial statements of the Partnership have been prepared in accordance with generally accepted accounting principles ("GAAP") in the United States and pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”). These unaudited interim consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and, therefore, do not include all disclosures required for financial statements prepared in conformity with GAAP. Accordingly, the accompanying unaudited interim consolidated financial statements and related notes should be read in conjunction with the Partnership’s consolidated financial statements included in the Partnership’s 2018 Annual Report on Form 10-K. The consolidated financial statements include the consolidated results of the Partnership. The results of operations for the three months ended March 31, 2019 are not necessarily indicative of the results to be expected for the full year. In the opinion of management, all adjustments, which are of a normal and recurring nature, necessary for the fair presentation of the financial results for all periods presented have been reflected. All intercompany balances and transactions have been eliminated. The Partnership evaluates the significant terms of its investments to determine the method of accounting to be applied to each respective investment. Investments in which the Partnership has less than a 20% ownership interest and does not have control or exercise significant influence are accounted for using fair value or cost minus impairment if fair value is not readily determinable. Investments in which the Partnership exercises control are consolidated, and the noncontrolling interests of such investments, which are not attributable directly or indirectly to the Partnership, are presented as a separate component of net income and equity in the accompanying consolidated financial statements. The unaudited interim consolidated financial statements include undivided interests in oil and natural gas property rights. The Partnership accounts for its share of oil and natural gas property rights by reporting its proportionate share of assets, liabilities, revenues, costs, and cash flows within the relevant lines on the accompanying unaudited interim consolidated balance sheets, statements of operations, and statements of cash flows. |
| Segment Reporting | Segment Reporting The Partnership operates in a single operating and reportable segment. Operating segments are defined as components of an enterprise for which separate financial information is evaluated regularly by the chief operating decision maker in deciding how to allocate resources and assess performance. The Partnership’s chief executive officer has been determined to be the chief operating decision maker and allocates resources and assesses performance based upon financial information at the consolidated level. |
| New Accounting Pronouncements | Accounting Pronouncements In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2016-02, Leases (Topic 842), that supersedes Accounting Standards Codification ("ASC") 840, Leases by requiring lessees to recognize lease assets and lease liabilities classified as operating leases on the balance sheet. See Note 3 - Impact of ASC 842 Adoption for further details related to the Partnership's adoption of this standard. In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820), which will remove, modify, and add certain required disclosures on fair value measurements. As amended, Topic 820 will no longer require the disclosure of the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, the policy of timing of transfers between levels, and the valuation processes for Level 3 fair value measurements. In addition, certain modifications to current disclosure requirements will be made, including clarifying that the measurement uncertainty disclosure is to communicate information about the uncertainty in measurement as of the reporting date. Certain disclosure requirements will also be added, including the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. For certain unobservable inputs, an entity may disclose other quantitative information in place of the weighted average if the entity determines that other quantitative information would be a more reasonable and rational method to reflect the distribution of unobservable inputs used to develop Level 3 fair value measurements. The new standard will be effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years, and early adoption is permitted. The Partnership does not plan to early adopt and is evaluating the impact that the new accounting guidance will have on its consolidated financial statements and related disclosures. |
| Earnings Per Unit | The Partnership applies the two-class method for purposes of calculating earnings per unit (“EPU”). The holders of the Partnership’s restricted common and subordinated units have all the rights of a unitholder, including non-forfeitable distribution rights. As participating securities, the restricted common and subordinated units are included in the calculation of basic earnings per unit. For the periods presented, the amount of earnings allocated to these participating units was not material. Net income (loss) attributable to the Partnership is allocated to the Partnership’s general partner and the common and subordinated unitholders in proportion to their pro rata ownership after giving effect to distributions, if any, declared during the period. |
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- References No definition available.
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- Definition Disclosure of accounting policy for basis of accounting, or basis of presentation, used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS). No definition available.
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| X | ||||||||||
- Definition Disclosure of accounting policy for computing basic and diluted earnings or loss per share for each class of common stock and participating security. Addresses all significant policy factors, including any antidilutive items that have been excluded from the computation and takes into account stock dividends, splits and reverse splits that occur after the balance sheet date of the latest reporting period but before the issuance of the financial statements. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Disclosure of accounting policy pertaining to new accounting pronouncements that may impact the entity's financial reporting. Includes, but is not limited to, quantification of the expected or actual impact. No definition available.
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- Definition Disclosure of accounting policy for segment reporting. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Summary of Significant Accounting Policies - (Tables) |
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| Accounting Policies [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Accounts Receivable | The following table presents information about the Partnership's accounts receivable:
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- References No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
Oil and Natural Gas Properties Acquisitions (Tables) |
3 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Mar. 31, 2019 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Business Combinations [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Fair Values of the Properties Acquired | The following table summarizes these acquisitions which were considered business combinations:
The following table summarizes these acquisitions which were considered business combinations:
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of the amounts recognized as of the acquisition date for each major class of assets acquired and liabilities assumed. May include but not limited to the following: (a) acquired receivables; (b) contingencies recognized at the acquisition date; and (c) the fair value of noncontrolling interests in the acquiree. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
Commodity Derivative Financial Instruments (Tables) |
3 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Mar. 31, 2019 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Derivative [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary of Fair Value and Classification of Derivative Instruments | The tables below summarize the fair values and classifications of the Partnership’s derivative instruments, as well as the gross recognized derivative assets, liabilities, and amounts offset in the consolidated balance sheets as of each date:
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| Changes in Fair Value of Company's Commodity Derivative Instruments | Changes in the fair values of the Partnership’s derivative instruments (both assets and liabilities) are presented on a net basis in the accompanying consolidated statements of operations and consolidated statements of cash flows and consist of the following for the periods presented:
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| Oil and Natural Gas | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Derivative [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary of Open Derivative Contracts | The Partnership had the following open derivative contracts for oil as of March 31, 2019:
The Partnership had the following open derivative contracts for natural gas as of March 31, 2019:
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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Fair Value Measurements (Tables) |
3 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Mar. 31, 2019 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value Disclosures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis | The following table presents information about the Partnership’s assets and liabilities measured at fair value on a recurring basis:
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
Incentive Compensation (Tables) |
3 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mar. 31, 2019 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Summary of Incentive Compensation Expense | The table below summarizes incentive compensation expense recorded in general and administrative expenses in the consolidated statements of operations for the three months ended March 31, 2019 and 2018:
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| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Earnings Per Unit (Tables) |
3 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Mar. 31, 2019 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Earnings Per Share [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Computation of Basic and Diluted Earnings per Common and Subordinated Unit | The following table sets forth the computation of basic and diluted earnings per common and subordinated unit:
|
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| Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share | The following units of potentially dilutive securities were excluded from the computation of diluted weighted average units outstanding because their inclusion would be anti-dilutive:
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Common and Subordinated Units (Tables) |
3 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mar. 31, 2019 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Distributions Made to Limited Partner, by Distribution | The following table provides information about the Partnership's per unit distributions to common and subordinated unitholders:
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of payment of cash or stock made to limited partner of limited partnership (LP). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
Business and Basis of Presentation - Additional Information (Details) |
Mar. 31, 2019
state
|
|---|---|
| Limited Partners Capital Account [Line Items] | |
| Cost basis, ownership percentage | 20.00% |
| U.S. | |
| Limited Partners Capital Account [Line Items] | |
| Number of states major onshore oil and natural gas basins located | 41 |
| X | ||||||||||
- Definition Cost method investments maximum ownership percentage for accounting purposes. No definition available.
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition The number of states the entity operates in as of the balance sheet date. No definition available.
|
| X | ||||||||||
- Details
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Summary of Significant Accounting Policies Accounts Receivable (Details) - USD ($) $ in Thousands |
Mar. 31, 2019 |
Dec. 31, 2018 |
Sep. 30, 2018 |
|---|---|---|---|
| Accounts, Notes, Loans and Financing Receivable [Line Items] | |||
| Accounts receivable | $ 103,327 | $ 113,148 | |
| Revenues from contracts with customers | |||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | |||
| Accounts receivable | 107,804 | $ 97,816 | |
| Other | |||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | |||
| Accounts receivable | $ 5,344 | $ 5,511 |
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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Impact of ASC 842 Adoption - Narrative (Details) |
3 Months Ended |
|---|---|
Mar. 31, 2019 | |
| Assets, Total | Lease Concentration Risk | |
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | |
| Concentration risk, percentage | 1.00% |
| X | ||||||||||
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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Oil and Natural Gas Properties Acquisitions - Schedule of Fair Values of the Properties Acquired (Details) - USD ($) $ in Thousands |
1 Months Ended | 3 Months Ended | 12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
Mar. 30, 2019 |
Feb. 28, 2019 |
Nov. 30, 2018 |
Sep. 30, 2018 |
Aug. 31, 2018 |
Jul. 31, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Mar. 31, 2019 |
Dec. 31, 2018 |
|
| Business Acquisition [Line Items] | ||||||||||
| Acquisition-related costs | $ 100 | $ 200 | ||||||||
| Permian Basin | ||||||||||
| Business Acquisition [Line Items] | ||||||||||
| Proved | $ 24 | $ 173 | $ 1,166 | $ 1,176 | $ 5,000 | $ 4,349 | $ 883 | $ 984 | 197 | 13,558 |
| Unproved | 0 | 8,437 | 0 | 0 | 34,673 | 7,944 | 13,688 | 21,452 | 8,437 | 77,757 |
| Net Working Capital | 0 | 1 | 0 | 0 | 74 | 215 | 8 | 133 | 1 | 430 |
| Total Fair Value | 24 | 8,611 | 1,166 | 1,176 | 39,747 | 12,508 | 14,579 | 22,569 | 8,635 | 91,745 |
| Consideration Paid | $ 24 | $ 8,611 | 1,166 | 1,176 | 26,461 | 3,764 | 14,579 | 22,569 | $ 8,635 | 69,715 |
| Fair Value of Common Units Issued | $ 0 | $ 0 | $ 13,286 | $ 8,744 | $ 0 | $ 0 | $ 22,030 | |||
| X | ||||||||||
- Definition Cost Incurred Acquisition of Recognized Identifiable Assets Acquired and Liabilities Assumed Cash and Cash Equivalents No definition available.
|
| X | ||||||||||
- Definition Net working capital cost incurred for acquisition of proved and unproved oil and gas properties. No definition available.
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Cost incurred, including capitalized costs and costs charged to expense, in acquisition of oil and gas properties. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Costs incurred, including capitalized costs and costs charged to expense, associated with the acquisition of oil and gas properties that have proved reserves. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Costs incurred, including capitalized costs and costs charged to expense, associated with the acquisition of oil and gas properties that have unproved reserves. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
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Oil and Natural Gas Properties Acquisitions - Additional Information (Details) $ in Thousands |
3 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|
|
Nov. 21, 2017
well
|
Feb. 21, 2017
well
|
Mar. 31, 2019
USD ($)
|
Mar. 31, 2018
USD ($)
|
Dec. 31, 2018
USD ($)
|
|
| Business Acquisition [Line Items] | |||||
| Business combination, consideration transferred | $ 20,900 | $ 149,900 | |||
| Acquisition-related costs | 100 | 200 | |||
| Issuance of common units, net of offering costs | (43) | $ 138 | |||
| East Texas | |||||
| Business Acquisition [Line Items] | |||||
| Payments to acquire oil, mineral, and royalty interests | 12,300 | 58,200 | |||
| 2019 Acquisitions | |||||
| Business Acquisition [Line Items] | |||||
| Payments to acquire oil, mineral, and royalty interests | 11,400 | ||||
| Issuance of common units, net of offering costs | 900 | ||||
| 2018 Acquisitions | |||||
| Business Acquisition [Line Items] | |||||
| Payments to acquire oil, mineral, and royalty interests | 57,600 | ||||
| Issuance of common units, net of offering costs | 600 | ||||
| Payments to noncontrolling interests | 1,700 | ||||
| Angelina County, Texas | Farmout Agreement | |||||
| Business Acquisition [Line Items] | |||||
| Business combination, ownership interest, acreage, percent | 50.00% | ||||
| Exploratory wells, expected to be drilled | well | 20 | ||||
| Exploratory wells, additional wells to be drilled | well | 20 | ||||
| Asset acquisition, number of phases | 3 | ||||
| Canaan Resource Partners | Angelina County, Texas | Farmout Agreement | |||||
| Business Acquisition [Line Items] | |||||
| Asset acquisition, term of phase | 2 years | ||||
| Asset acquisition, funding requirements, drilling and completion costs, percent | 80.00% | ||||
| Asset acquisition, ownership interest in wells, percent | 80.00% | ||||
| Asset acquisition, ownership interest, gross, percent | 40.00% | ||||
| Asset acquisition, third phase, ownership interest in additional wells, percent | 40.00% | ||||
| Asset acquisition, third phase, ownership interest in additional wells, gross, percent | 20.00% | ||||
| Asset acquisition, third phase, funding requirements, drilling and completion costs, percent | 40.00% | ||||
| Business combination, pro forma information, revenue of acquiree since acquisition date, actual | 86,400 | ||||
| Pivotal | San Augustine County, Texas | Farmout Agreement | |||||
| Business Acquisition [Line Items] | |||||
| Exploratory wells, expected to be drilled | well | 80 | ||||
| Asset acquisition, ownership interest, gross, percent | 10.00% | ||||
| Business combination, pro forma information, revenue of acquiree since acquisition date, actual | 86,800 | ||||
| Asset acquisition, ownership interest, in wells operated by others, percent | 100.00% | ||||
| Other long-term liabilities | Canaan Resource Partners | Angelina County, Texas | Farmout Agreement | |||||
| Business Acquisition [Line Items] | |||||
| Business combination, pro forma information, working interests in wells drilled and completed, actual | 8,900 | 11,600 | |||
| Other long-term liabilities | Pivotal | San Augustine County, Texas | Farmout Agreement | |||||
| Business Acquisition [Line Items] | |||||
| Business combination, pro forma information, working interests in wells drilled and completed, actual | $ 63,100 | $ 41,200 | |||
| Minimum | Pivotal | San Augustine County, Texas | Farmout Agreement | |||||
| Business Acquisition [Line Items] | |||||
| Asset acquisition, ownership interest, in wells operated by others, gross, percent | 12.50% | ||||
| Maximum | Pivotal | San Augustine County, Texas | Farmout Agreement | |||||
| Business Acquisition [Line Items] | |||||
| Asset acquisition, ownership interest, in wells operated by others, gross, percent | 25.00% | ||||
| X | ||||||||||
- Definition Asset Acquisition, Funding Requirements, Drilling and Completion Costs, Percent No definition available.
|
| X | ||||||||||
- Definition Asset Acquisition, Number of Phases No definition available.
|
| X | ||||||||||
- Definition Asset Acquisition, Ownership Interest, Gross, Percent No definition available.
|
| X | ||||||||||
- Definition Asset Acquisition, Ownership Interest, In Wells Operated By Others, Gross, Percent No definition available.
|
| X | ||||||||||
- Definition Asset Acquisition, Ownership Interest, In Wells Operated By Others, Percent No definition available.
|
| X | ||||||||||
- Definition Asset Acquisition, Ownership Interest in Wells, Percent No definition available.
|
| X | ||||||||||
- Definition Asset Acquisition Payments To Acquire Oil Mineral And Royalty Interests No definition available.
|
| X | ||||||||||
- Definition Asset Acquisition, Term Of Phase No definition available.
|
| X | ||||||||||
- Definition Asset Acquisition, Third Phase, Funding Requirements, Drilling And Completion Costs, Percent No definition available.
|
| X | ||||||||||
- Definition Asset Acquisition,Third Phase, Ownership Interest In Additional Wells, Percent No definition available.
|
| X | ||||||||||
- Definition Asset Acquisition, Third Phase, Ownership Interest in Additional Wells, Gross, Percent No definition available.
|
| X | ||||||||||
- Definition Business Combination, Ownership Interest, Acreage, Percent No definition available.
|
| X | ||||||||||
- Definition Business Combination, Pro Forma Information, Working Interests In Wells Drilled And Completed, Actual No definition available.
|
| X | ||||||||||
- Definition Exploratory Wells, Additional Wells To Be Drilled No definition available.
|
| X | ||||||||||
- Definition Exploratory Wells, Expected To Be Drilled No definition available.
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Monetary value of the issuance of new units of limited partnership interest in a public offering. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of cash outflow to a noncontrolling interest. Includes, but not limited to, reduction of noncontrolling interest ownership. Excludes dividends paid to the noncontrolling interest. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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Commodity Derivative Financial Instruments - Additional Information (Details) $ in Thousands |
Mar. 31, 2019
USD ($)
counterparty
|
Dec. 31, 2018
USD ($)
|
|---|---|---|
| Derivative [Line Items] | ||
| Number of counterparties | counterparty | 9 | |
| Gross fair value amount | $ | $ 16,659 | $ 50,264 |
| X | ||||||||||
- Definition Derivatives, Number Of Counterparties No definition available.
|
| X | ||||||||||
- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
Commodity Derivative Financial Instruments - Summary of Fair Value and Classification of Derivative Instruments (Details) - USD ($) $ in Thousands |
Mar. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Derivatives Fair Value [Line Items] | ||
| Gross fair value amount | $ 16,659 | $ 50,264 |
| Effect of Counterparty Netting, Assets | (9,557) | (2,226) |
| Total net carrying value on Balance Sheet, assets | 7,102 | 48,038 |
| Gross Fair Value, Liabilities | 11,547 | 2,226 |
| Effect of Counterparty Netting, Liabilities | (9,557) | (2,226) |
| Total net carrying value on Balance Sheet, liabilities | 1,990 | 0 |
| Commodity derivative assets | ||
| Derivatives Fair Value [Line Items] | ||
| Gross fair value amount | 11,221 | 38,746 |
| Effect of Counterparty Netting, Assets | (7,209) | (776) |
| Total net carrying value on Balance Sheet, assets | 4,012 | 37,970 |
| Deferred charges and other long-term assets | ||
| Derivatives Fair Value [Line Items] | ||
| Gross fair value amount | 5,438 | 11,518 |
| Effect of Counterparty Netting, Assets | (2,348) | (1,450) |
| Total net carrying value on Balance Sheet, assets | 3,090 | 10,068 |
| Commodity derivative liabilities | ||
| Derivatives Fair Value [Line Items] | ||
| Gross Fair Value, Liabilities | 9,176 | 776 |
| Effect of Counterparty Netting, Liabilities | (7,209) | (776) |
| Total net carrying value on Balance Sheet, liabilities | 1,967 | 0 |
| Commodity derivative liabilities | ||
| Derivatives Fair Value [Line Items] | ||
| Gross Fair Value, Liabilities | 2,371 | 1,450 |
| Effect of Counterparty Netting, Liabilities | (2,348) | (1,450) |
| Total net carrying value on Balance Sheet, liabilities | $ 23 | $ 0 |
| X | ||||||||||
- Definition Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Fair value, after offset of derivative liability, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, before offset against an obligation to return collateral under a master netting arrangement. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Fair value, after offset of derivative asset, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be and before offset against a right to receive collateral under a master netting arrangement. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Fair value of asset associated with financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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Commodity Derivative Financial Instruments - Changes in Fair Value of Company's Commodity Derivative Instruments (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2019 |
Mar. 31, 2018 |
|
| Derivatives not designated as hedging instruments | ||
| Gain (loss) on commodity derivative instruments | $ (41,183) | $ (16,333) |
| Net cash paid (received) on settlements of derivative instruments | (1,743) | 4,375 |
| Not Designated as Hedging Instrument | ||
| Derivatives not designated as hedging instruments | ||
| Beginning fair value of commodity derivative instruments | 48,038 | (5,028) |
| Net change in fair value of commodity derivative instruments | (42,926) | (11,958) |
| Ending fair value of commodity derivative instruments | 5,112 | (16,986) |
| Not Designated as Hedging Instrument | Oil | ||
| Derivatives not designated as hedging instruments | ||
| Gain (loss) on commodity derivative instruments | (39,261) | (14,476) |
| Net cash paid (received) on settlements of derivative instruments | (4,555) | 5,148 |
| Not Designated as Hedging Instrument | Natural gas and natural gas liquids sales | ||
| Derivatives not designated as hedging instruments | ||
| Gain (loss) on commodity derivative instruments | (1,922) | (1,857) |
| Net cash paid (received) on settlements of derivative instruments | $ 2,812 | $ (773) |
| X | ||||||||||
- Definition The net cash outflow or inflow from derivative instruments during the period No definition available.
|
| X | ||||||||||
- Definition Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
|
| X | ||||||||||
- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of open agreements to purchase or sell mineral resources, energy, and agricultural products at some future point held at each balance sheet date, that was included in earnings for the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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Commodity Derivative Financial Instruments - Summary of Open Derivative Contracts for Oil and Natural Gas (Details) - Not Designated as Hedging Instrument bbl in Thousands, MMBTU in Thousands |
3 Months Ended |
|---|---|
|
Mar. 31, 2019
MMBTU
$ / MMBTU
$ / bbl
bbl
| |
| Swaps Contract | First Quarter 2019 | Oil | Swap | |
| Derivative [Line Items] | |
| Derivative Contract, Volume (in Bbl) | bbl | 255 |
| Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu) | 58.54 |
| Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | 52.82 |
| Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | 65.58 |
| Swaps Contract | Second Quarter 2019 | Oil | Swap | |
| Derivative [Line Items] | |
| Derivative Contract, Volume (in Bbl) | bbl | 855 |
| Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu) | 58.72 |
| Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | 52.82 |
| Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | 65.58 |
| Swaps Contract | Second Quarter 2019 | Natural gas and natural gas liquids sales | Swap | |
| Derivative [Line Items] | |
| Derivative Contract, Volume (in MMBtu) | MMBTU | 14,520 |
| Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu) | $ / MMBTU | 2.96 |
| Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | $ / MMBTU | 2.81 |
| Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | $ / MMBTU | 3.20 |
| Swaps Contract | Third Quarter 2019 | Oil | Swap | |
| Derivative [Line Items] | |
| Derivative Contract, Volume (in Bbl) | bbl | 855 |
| Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu) | 58.37 |
| Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | 52.82 |
| Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | 63.75 |
| Swaps Contract | Third Quarter 2019 | Natural gas and natural gas liquids sales | Swap | |
| Derivative [Line Items] | |
| Derivative Contract, Volume (in MMBtu) | MMBTU | 14,640 |
| Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu) | $ / MMBTU | 2.96 |
| Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | $ / MMBTU | 2.81 |
| Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | $ / MMBTU | 3.20 |
| Swaps Contract | Fourth Quarter 2019 | Oil | Swap | |
| Derivative [Line Items] | |
| Derivative Contract, Volume (in Bbl) | bbl | 855 |
| Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu) | 58.37 |
| Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | 52.82 |
| Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | 63.75 |
| Swaps Contract | Fourth Quarter 2019 | Natural gas and natural gas liquids sales | Swap | |
| Derivative [Line Items] | |
| Derivative Contract, Volume (in MMBtu) | MMBTU | 14,640 |
| Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu) | $ / MMBTU | 2.96 |
| Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | $ / MMBTU | 2.81 |
| Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | $ / MMBTU | 3.20 |
| Swaps Contract | First Quarter 2020 | Oil | Swap | |
| Derivative [Line Items] | |
| Derivative Contract, Volume (in Bbl) | bbl | 270 |
| Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu) | 57.87 |
| Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | 57.46 |
| Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | 58.65 |
| Swaps Contract | First Quarter 2020 | Natural gas and natural gas liquids sales | Swap | |
| Derivative [Line Items] | |
| Derivative Contract, Volume (in MMBtu) | MMBTU | 6,370 |
| Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu) | $ / MMBTU | 2.72 |
| Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | $ / MMBTU | 2.72 |
| Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | $ / MMBTU | 2.73 |
| Swaps Contract | Second Quarter 2020 | Oil | Swap | |
| Derivative [Line Items] | |
| Derivative Contract, Volume (in Bbl) | bbl | 270 |
| Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu) | 57.87 |
| Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | 57.46 |
| Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | 58.65 |
| Swaps Contract | Second Quarter 2020 | Natural gas and natural gas liquids sales | Swap | |
| Derivative [Line Items] | |
| Derivative Contract, Volume (in MMBtu) | MMBTU | 6,370 |
| Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu) | $ / MMBTU | 2.72 |
| Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | $ / MMBTU | 2.72 |
| Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | $ / MMBTU | 2.73 |
| Swaps Contract | Third Quarter 2020 | Oil | Swap | |
| Derivative [Line Items] | |
| Derivative Contract, Volume (in Bbl) | bbl | 270 |
| Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu) | 57.87 |
| Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | 57.46 |
| Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | 58.65 |
| Swaps Contract | Third Quarter 2020 | Natural gas and natural gas liquids sales | Swap | |
| Derivative [Line Items] | |
| Derivative Contract, Volume (in MMBtu) | MMBTU | 6,440 |
| Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu) | $ / MMBTU | 2.72 |
| Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | $ / MMBTU | 2.72 |
| Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | $ / MMBTU | 2.73 |
| Swaps Contract | Fourth Quarter 2020 | Oil | Swap | |
| Derivative [Line Items] | |
| Derivative Contract, Volume (in Bbl) | bbl | 270 |
| Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu) | 57.87 |
| Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | 57.46 |
| Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | 58.65 |
| Swaps Contract | Fourth Quarter 2020 | Natural gas and natural gas liquids sales | Swap | |
| Derivative [Line Items] | |
| Derivative Contract, Volume (in MMBtu) | MMBTU | 6,440 |
| Derivative Contract, Weighted Average Price (in USD per Bbl or MMBtu) | $ / MMBTU | 2.72 |
| Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | $ / MMBTU | 2.72 |
| Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | $ / MMBTU | 2.73 |
| Collar Contract | First Quarter 2019 | Oil | Collar | |
| Derivative [Line Items] | |
| Derivative Contract, Volume (in Bbl) | bbl | 20 |
| Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | 65.00 |
| Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | 74.00 |
| Collar Contract | Second Quarter 2019 | Oil | Collar | |
| Derivative [Line Items] | |
| Derivative Contract, Volume (in Bbl) | bbl | 60 |
| Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | 65.00 |
| Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | 74.00 |
| Collar Contract | Third Quarter 2019 | Oil | Collar | |
| Derivative [Line Items] | |
| Derivative Contract, Volume (in Bbl) | bbl | 60 |
| Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | 65.00 |
| Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | 74.00 |
| Collar Contract | Fourth Quarter 2019 | Oil | Collar | |
| Derivative [Line Items] | |
| Derivative Contract, Volume (in Bbl) | bbl | 60 |
| Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | 65.00 |
| Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | 74.00 |
| Collar Contract | First Quarter 2020 | Oil | Collar | |
| Derivative [Line Items] | |
| Derivative Contract, Volume (in Bbl) | bbl | 210 |
| Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | 56.43 |
| Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | 67.14 |
| Collar Contract | Second Quarter 2020 | Oil | Collar | |
| Derivative [Line Items] | |
| Derivative Contract, Volume (in Bbl) | bbl | 210 |
| Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | 56.43 |
| Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | 67.14 |
| Collar Contract | Third Quarter 2020 | Oil | Collar | |
| Derivative [Line Items] | |
| Derivative Contract, Volume (in Bbl) | bbl | 210 |
| Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | 56.43 |
| Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | 67.14 |
| Collar Contract | Fourth Quarter 2020 | Oil | Collar | |
| Derivative [Line Items] | |
| Derivative Contract, Volume (in Bbl) | bbl | 210 |
| Derivative Contract, Price Range Low (in USD per Bbl or MMBtu) | 56.43 |
| Derivative Contract, Price Range High (in USD per Bbl or MMBtu) | 67.14 |
| X | ||||||||||
- Definition The average cap rate on a group of price risk derivatives such as caps or collars. A payment or receipt is triggered if the market rate exceeds the cap rate on the contract. No definition available.
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- Definition The average floor rate on a group of price risk derivatives such as floors or collars. A payment or receipt is triggered if the market rate falls below the floor rate on the contract. No definition available.
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- Definition The average forward price on the group of price risk forward or futures contracts, such as gas futures contracts. No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Nominal energy measure used to calculate payments on a derivative instrument. No definition available.
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- Definition Nominal volume used to calculate payments on a derivative instrument. No definition available.
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Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands |
Mar. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | ||
| Gross fair value amount | $ 16,659 | $ 50,264 |
| Effect of Counterparty Netting, Assets | (9,557) | (2,226) |
| Total net carrying value on Balance Sheet, assets | 7,102 | 48,038 |
| Gross Fair Value, Liabilities | 11,547 | 2,226 |
| Effect of Counterparty Netting, Liabilities | (9,557) | (2,226) |
| Total net carrying value on Balance Sheet, liabilities | 1,990 | 0 |
| Commodity Derivative Instruments | Fair Value Measurements, Recurring Basis | ||
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | ||
| Effect of Counterparty Netting, Assets | (9,557) | (2,226) |
| Total net carrying value on Balance Sheet, assets | 7,102 | 48,038 |
| Effect of Counterparty Netting, Liabilities | (9,557) | (2,226) |
| Total net carrying value on Balance Sheet, liabilities | 1,990 | 0 |
| Commodity Derivative Instruments | Fair Value Measurements, Recurring Basis | Level 1 | ||
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | ||
| Gross fair value amount | 0 | 0 |
| Gross Fair Value, Liabilities | 0 | 0 |
| Commodity Derivative Instruments | Fair Value Measurements, Recurring Basis | Level 2 | ||
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | ||
| Gross fair value amount | 16,659 | 50,264 |
| Gross Fair Value, Liabilities | 11,547 | 2,226 |
| Commodity Derivative Instruments | Fair Value Measurements, Recurring Basis | Level 3 | ||
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | ||
| Gross fair value amount | 0 | 0 |
| Gross Fair Value, Liabilities | $ 0 | $ 0 |
| X | ||||||||||
- Definition Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value, after offset of derivative liability, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, before offset against an obligation to return collateral under a master netting arrangement. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value, after offset of derivative asset, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, elected not to be and before offset against a right to receive collateral under a master netting arrangement. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value of asset associated with financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Credit Facility (Details) |
3 Months Ended | |||||
|---|---|---|---|---|---|---|
|
Oct. 31, 2018
USD ($)
|
Oct. 31, 2016 |
Mar. 31, 2019
USD ($)
|
Dec. 31, 2018
USD ($)
|
May 04, 2018
USD ($)
|
Apr. 25, 2017
USD ($)
|
|
| Line Of Credit Facility [Line Items] | ||||||
| Credit facility | $ 435,000,000 | $ 410,000,000 | ||||
| Senior Line of Credit | Revolving Credit Facility | ||||||
| Line Of Credit Facility [Line Items] | ||||||
| Maximum borrowing capacity | $ 1,000,000,000 | |||||
| Borrowing base | $ 675,000,000 | $ 600,000,000 | $ 550,000,000 | |||
| Interest payable, term | 90 days | |||||
| Weighted average interest rate (percent) | 4.75% | 4.76% | ||||
| Borrowing base threshold (percent) | 50.00% | |||||
| Credit facility | $ 435,000,000 | $ 410,000,000 | ||||
| Unused portion of current borrowing base | $ 240,000,000 | $ 265,000,000 | ||||
| Senior Line of Credit | Revolving Credit Facility | Federal Funds [Member] | ||||||
| Line Of Credit Facility [Line Items] | ||||||
| Interest rate (percent) | 0.50% | |||||
| Senior Line of Credit | Revolving Credit Facility | LIBOR Plus Margin Rate | ||||||
| Line Of Credit Facility [Line Items] | ||||||
| Interest rate (percent) | 1.00% | |||||
| Senior Line of Credit | Revolving Credit Facility | Borrowing Base Utilization Percentage Less Than 50% | ||||||
| Line Of Credit Facility [Line Items] | ||||||
| Commitment fee payable rate (percent) | 0.375% | |||||
| Senior Line of Credit | Revolving Credit Facility | Borrowing Base Utilization Percentage Equal to or Greater Than 50% | ||||||
| Line Of Credit Facility [Line Items] | ||||||
| Commitment fee payable rate (percent) | 0.50% | |||||
| Senior Line of Credit | Revolving Credit Facility | Minimum | ||||||
| Line Of Credit Facility [Line Items] | ||||||
| Interest payable, term | 90 days | |||||
| Current ratio | 1 | |||||
| Senior Line of Credit | Revolving Credit Facility | Minimum | LIBOR Plus Margin Rate | ||||||
| Line Of Credit Facility [Line Items] | ||||||
| Interest rate (percent) | 1.75% | 2.00% | ||||
| Senior Line of Credit | Revolving Credit Facility | Minimum | Prime Rate Plus Margin Rate | ||||||
| Line Of Credit Facility [Line Items] | ||||||
| Interest rate (percent) | 0.75% | 1.00% | ||||
| Senior Line of Credit | Revolving Credit Facility | Maximum | ||||||
| Line Of Credit Facility [Line Items] | ||||||
| Ratio of total debt to EBITDAX | 3.5 | |||||
| Senior Line of Credit | Revolving Credit Facility | Maximum | LIBOR Plus Margin Rate | ||||||
| Line Of Credit Facility [Line Items] | ||||||
| Interest rate (percent) | 2.75% | 3.00% | ||||
| Senior Line of Credit | Revolving Credit Facility | Maximum | Prime Rate Plus Margin Rate | ||||||
| Line Of Credit Facility [Line Items] | ||||||
| Interest rate (percent) | 1.75% | 2.00% |
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- Definition Current ratio. No definition available.
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- Definition Debt to earnings before interest taxes depreciation amortization and exploration ratio. No definition available.
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- Definition Line of Credit, Borrowing Base, Threshold, Percent No definition available.
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- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. No definition available.
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- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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- Definition Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Weighted average interest rate of debt outstanding. No definition available.
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- Definition The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used. No definition available.
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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The carrying value as of the balance sheet date of the noncurrent portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Commitments and Contingencies - Additional Information (Details) |
Mar. 31, 2019 |
Nov. 28, 2017 |
|---|---|---|
| Samedan | ||
| Business Acquisition [Line Items] | ||
| Business acquisition, percentage of voting interests acquired | 100.00% | |
| Comin | ||
| Business Acquisition [Line Items] | ||
| Business acquisition, percentage of voting interests acquired | 100.00% | |
| Noncontrolling interest, ownership percentage by noncontrolling owners | 45.33% | |
| Temin | ||
| Business Acquisition [Line Items] | ||
| Noncontrolling interest, ownership percentage by noncontrolling owners | 42.63% |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity. No definition available.
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Incentive Compensation - Summary of Incentive Compensation Expense (Details) - General and administrative expenses - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2019 |
Mar. 31, 2018 |
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||
| Cash—short and long-term incentive plans | $ 1,772 | $ 1,634 |
| Total incentive compensation expense | 10,996 | 7,860 |
| Restricted common and subordinated units | ||
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||
| Equity-based compensation | 3,019 | 3,405 |
| Restricted Performance Units | ||
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||
| Equity-based compensation | 5,620 | 2,242 |
| Board of Directors | Common Units | ||
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||
| Total incentive compensation expense | $ 585 | $ 579 |
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- Definition Incentive compensation cash. No definition available.
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- Definition Incentive compensation expense. No definition available.
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Preferred Units (Details) $ / shares in Units, $ in Thousands |
3 Months Ended | |||
|---|---|---|---|---|
|
Nov. 28, 2017
USD ($)
$ / shares
shares
|
Mar. 31, 2019
USD ($)
$ / shares
shares
|
Mar. 31, 2018
shares
|
Dec. 31, 2018
USD ($)
shares
|
|
| Preferred Units | ||||
| Class of Stock [Line Items] | ||||
| Partners' equity, preferred units, outstanding (in shares) | 0 | |||
| Preferred units distribution rate | 10.00% | |||
| Adjusted conversion price (in us dollars per share) | $ / shares | $ 14.2683 | |||
| Number of preferred units redeemed | 2,115 | |||
| Preferred stock, redemption amount | $ | $ 2,100 | |||
| Number of preferred units converted (in shares) | 24,248 | |||
| Conversion of preferred units to common units | $ | $ 24,200 | |||
| Common Units | ||||
| Class of Stock [Line Items] | ||||
| Adjusted conversion rate | 30.3431 | |||
| Conversion of preferred units (in shares) | 735,758 | |||
| Number of shares issued (in shares) | 0 | 8,204 | ||
| Subordinated Units | ||||
| Class of Stock [Line Items] | ||||
| Adjusted conversion rate | 39.7427 | |||
| Conversion of preferred units (in shares) | 963,681 | |||
| Series B Cumulative Convertible Preferred Units | ||||
| Class of Stock [Line Items] | ||||
| Partners' equity, preferred units, outstanding (in shares) | 14,711,000 | 14,711,000 | ||
| Preferred units, outstanding value | $ | $ 298,361 | $ 298,361 | ||
| Accrued distributions | $ | $ 5,300 | $ 5,300 | ||
| Preferred units distribution rate | 7.00% | |||
| Shares, price per share (in dollars per share) | $ / shares | $ 20.3926 | |||
| Proceeds from issuance of convertible preferred stock | $ | $ 300,000 | |||
| Minimum underlying value for conversion trigger | $ | $ 10,000 | |||
| Series B Cumulative Convertible Preferred Units | Noble Acquisition | ||||
| Class of Stock [Line Items] | ||||
| Number of shares issued (in shares) | 14,711,219 | |||
| X | ||||||||||
- Definition Convertible preferred units, conversion price. No definition available.
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- Definition Convertible preferred units, conversion ratio. No definition available.
|
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- Definition Minimum Underlying Value For Conversion Trigger No definition available.
|
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- Definition Number of convertible preferred stock converted to other securities. No definition available.
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- Definition Number of preferred units redeemed. No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The percentage rate used to calculate dividend payments on preferred stock. No definition available.
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- Definition The redemption (or callable) amount of currently redeemable preferred stock. Includes amounts representing dividends not currently declared or paid but which will be payable under the redemption features or for which ultimate payment is solely within the control of the issuer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The cash inflow from issuance of preferred stocks identified as being convertible into another form of financial instrument, typically the entity's common stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The number of shares issued or sold by the subsidiary or equity method investee per stock transaction. No definition available.
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- Definition Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction. No definition available.
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- Definition Number of shares issued during the period as a result of the conversion of convertible securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The gross value of stock issued during the period upon the conversion of convertible securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Carrying amount, attributable to parent, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer. No definition available.
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| X | ||||||||||
- Definition The number of securities classified as temporary equity that have been issued and are held by the entity's shareholders. Securities outstanding equals securities issued minus securities held in treasury. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Earnings Per Unit - Additional Information (Details) - shares shares in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2019 |
Mar. 31, 2018 |
|
| Earnings Per Share [Abstract] | ||
| Number of performance units award included in calculation of diluted EPU | 0.6 | 0.1 |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Earnings Per Unit - Computation of Basic and Diluted Earnings per Unit (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2019 |
Mar. 31, 2018 |
|
| Earnings Per Share Basic [Line Items] | ||
| Net income (loss) | $ 9,017 | $ 41,957 |
| Net (income) loss attributable to noncontrolling interests | 0 | (27) |
| Distributions on Series A redeemable preferred units | 0 | (25) |
| Distributions on Series B cumulative convertible preferred units | (5,250) | (5,250) |
| NET INCOME (LOSS) ATTRIBUTABLE TO THE GENERAL PARTNER AND COMMON AND SUBORDINATED UNITS | 3,767 | 36,655 |
| ALLOCATION OF NET INCOME (LOSS): | ||
| General partner interest | 0 | 0 |
| NET INCOME (LOSS) ATTRIBUTABLE TO THE GENERAL PARTNER AND COMMON AND SUBORDINATED UNITS | $ 3,767 | $ 36,655 |
| NET INCOME (LOSS) ATTRIBUTABLE TO LIMITED PARTNERS PER COMMON AND SUBORDINATED UNIT: | ||
| Effect of dilutive securities (in shares) | 600 | 100 |
| Common Units | ||
| ALLOCATION OF NET INCOME (LOSS): | ||
| Allocation of net income (loss) | $ 1,905 | $ 24,329 |
| NET INCOME (LOSS) ATTRIBUTABLE TO LIMITED PARTNERS PER COMMON AND SUBORDINATED UNIT: | ||
| Weighted average units outstanding (basic) (in shares) | 109,420 | 103,774 |
| Weighted average units outstanding (diluted) (in shares) | 110,035 | 103,838 |
| Per unit (basic) (in dollars per share) | $ 0.02 | $ 0.23 |
| Per unit (diluted) (in dollars per share) | $ 0.02 | $ 0.23 |
| Subordinated Units | ||
| ALLOCATION OF NET INCOME (LOSS): | ||
| Allocation of net income (loss) | $ 1,862 | $ 12,326 |
| NET INCOME (LOSS) ATTRIBUTABLE TO LIMITED PARTNERS PER COMMON AND SUBORDINATED UNIT: | ||
| Weighted average units outstanding (basic) (in shares) | 96,329 | 95,395 |
| Effect of dilutive securities (in shares) | 0 | 0 |
| Weighted average units outstanding (diluted) (in shares) | 96,329 | 95,395 |
| Per unit (basic) (in dollars per share) | $ 0.02 | $ 0.13 |
| Per unit (diluted) (in dollars per share) | $ 0.02 | $ 0.13 |
| X | ||||||||||
- Definition Distributable Preferred Stock Dividends No definition available.
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- Definition Net income loss attributable to limited partners per unit. No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount, before tax, of income (loss) attributable to noncontrolling interest. Includes, but is not limited to, income (loss) from continuing operations, discontinued operations and equity method investments. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition Aggregate amount of net income allocated to general partners. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Aggregate amount of net income allocated to limited partners. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Per unit of ownership amount after tax of income (loss) available to limited partnership (LP) unit-holder and units that would have been outstanding assuming the issuance of limited partner units for dilutive potential units outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Per unit of ownership amount after tax of income (loss) available to outstanding limited partnership (LP) unit-holder. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Dividends paid to preferred stock holders that is redeemable solely at the option of the issuer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Weighted average number of limited partnership units outstanding determined by relating the portion of time within a reporting period that limited partnership units have been outstanding to the total time in that period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Weighted average number of limited partnership units outstanding determined by relating the portion of time within a reporting period that limited partnership units have been outstanding to the total time in that period. Used in the calculation of diluted net income or loss per limited partnership unit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Earnings Per Unit - Potentially Dilutive Securities Excluded from the Computation of Diluted Weighted Average Shares Outstanding (Details) - shares shares in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2019 |
Mar. 31, 2018 |
|
| Common Units | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Units issuable upon conversion of preferred units excluded from the calculation of diluted EPU | 14,969 | 15,244 |
| Subordinated Units | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Units issuable upon conversion of preferred units excluded from the calculation of diluted EPU | 0 | 247 |
| Series A redeemable preferred units on an as-converted basis | Common Units | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Units issuable upon conversion of preferred units excluded from the calculation of diluted EPU | 0 | 181 |
| Series A redeemable preferred units on an as-converted basis | Subordinated Units | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Units issuable upon conversion of preferred units excluded from the calculation of diluted EPU | 0 | 247 |
| Series B cumulative convertible preferred units on an as-converted basis | Common Units | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Units issuable upon conversion of preferred units excluded from the calculation of diluted EPU | 14,969 | 15,063 |
| X | ||||||||||
- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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Common and Subordinated Units (Details) - USD ($) |
3 Months Ended | 22 Months Ended | |||
|---|---|---|---|---|---|
Mar. 31, 2019 |
Mar. 31, 2018 |
Mar. 31, 2019 |
Nov. 05, 2018 |
May 26, 2017 |
|
| Class of Stock [Line Items] | |||||
| Stock repurchase program, authorized amount | $ 75,000,000 | ||||
| Proceeds from issuance of common units, net of offering costs | $ (43,000) | $ 138,000 | |||
| Series B Cumulative Convertible Preferred Units | |||||
| Class of Stock [Line Items] | |||||
| Preferred units minimum voting rights rate (percent) | 15.00% | 15.00% | |||
| Preferred units distribution rate | 7.00% | ||||
| Common Units | |||||
| Class of Stock [Line Items] | |||||
| Equity distribution agreement, maximum value | $ 100,000,000 | ||||
| Number of shares issued (in shares) | 0 | 8,204 | |||
| Proceeds from issuance of common units, net of offering costs | $ 100,000 | $ 73,000,000 | |||
| X | ||||||||||
- Definition Equity Offering Amount, Maximum No definition available.
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- Definition Preferred Stock, Minimum Voting Rights No definition available.
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- Definition The cash inflow from the issuance of common limited partners units net of offering costs and expenses during the period. No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition The percentage rate used to calculate dividend payments on preferred stock. No definition available.
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- Definition The number of shares issued or sold by the subsidiary or equity method investee per stock transaction. No definition available.
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- Definition Amount of stock repurchase plan authorized. No definition available.
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Common and Subordinated Units - Per share distributions to common and subordinated unitholders (Details) - $ / shares |
3 Months Ended | |
|---|---|---|
Mar. 31, 2019 |
Mar. 31, 2018 |
|
| Common Units | ||
| Class of Stock [Line Items] | ||
| Per unit (in usd per share) | $ 0.37 | $ 0.31 |
| Subordinated Units | ||
| Class of Stock [Line Items] | ||
| Per unit (in usd per share) | $ 0.37 | $ 0.21 |
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Per unit of ownership amount of cash distributions paid to unit-holder of a limited partnership (LP). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Subsequent Events (Details) - USD ($) |
May 06, 2019 |
Apr. 30, 2019 |
Mar. 31, 2019 |
Dec. 31, 2018 |
Oct. 31, 2018 |
May 04, 2018 |
Mar. 31, 2018 |
Dec. 31, 2017 |
Apr. 25, 2017 |
|---|---|---|---|---|---|---|---|---|---|
| Common Units | |||||||||
| Subsequent Event [Line Items] | |||||||||
| Partners' capital account, units | 109,377,000 | 108,363,000 | 104,926,000 | 103,456,000 | |||||
| Subordinated Units | |||||||||
| Subsequent Event [Line Items] | |||||||||
| Partners' capital account, units | 96,329,000 | 96,329,000 | 96,329,000 | 95,388,000 | |||||
| Subsequent Event | Common Units | |||||||||
| Subsequent Event [Line Items] | |||||||||
| Quarterly cash distribution declared (in usd per unit) | $ 0.37 | ||||||||
| Partners' capital account, units | 96,328,836 | ||||||||
| Subsequent Event | Subordinated Units | |||||||||
| Subsequent Event [Line Items] | |||||||||
| Quarterly cash distribution declared (in usd per unit) | $ 0.37 | ||||||||
| Senior Line of Credit | Revolving Credit Facility | |||||||||
| Subsequent Event [Line Items] | |||||||||
| Borrowing base | $ 675,000,000 | $ 600,000,000 | $ 550,000,000 | ||||||
| Subordinated Units | |||||||||
| Subsequent Event [Line Items] | |||||||||
| Entity Partnership Units Outstanding (in shares) | 96,328,836 |
| X | ||||||||||
- Definition Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument. No definition available.
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| X | ||||||||||
- Definition Per unit of ownership amount of cash distributions declared to unit-holder of a limited partnership (LP). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The number of each class of partnership units outstanding at the balance sheet date. Units represent shares of ownership of the general, limited, and preferred partners. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. No definition available.
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