Acquisitions (Narrative) (Details) |
3 Months Ended | |||||
|---|---|---|---|---|---|---|
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Jun. 05, 2017
USD ($)
a
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Feb. 13, 2017
USD ($)
a
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Mar. 31, 2018
USD ($)
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Dec. 31, 2017
USD ($)
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May 19, 2017
USD ($)
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Oct. 03, 2016
USD ($)
|
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| Business Acquisition [Line Items] | ||||||
| Acquisition deposit | $ 0 | $ 900,000 | ||||
| 6.125% senior unsecured notes due 2024 | ||||||
| Business Acquisition [Line Items] | ||||||
| Debt instrument aggregate principal amount | $ 200,000,000 | $ 400,000,000 | ||||
| Debt instrument, interest rate, stated (as a percent) | 6.125% | 6.125% | 6.125% | |||
| Monarch and Wildhorse | ||||||
| Business Acquisition [Line Items] | ||||||
| Consideration transferred | $ 35,900,000 | |||||
| Delaware Basin | ||||||
| Business Acquisition [Line Items] | ||||||
| Consideration transferred | $ 52,500,000 | $ 646,559,000 | ||||
| Gas and oil area, developed and undeveloped, gross (in acres) | a | 7,031 | 29,175 | ||||
| Gas and oil area, developed and undeveloped, net (in acres) | a | 2,488 | 16,688 | ||||
| Working interest (as a percent) | 82.00% | |||||
| Net revenue interest (as a percent) | 75.00% | |||||
| Acquisition deposit | $ 46,138,000 |
| X | ||||||||||
- Definition Acquired Gas and Oil Area, Developed and Undeveloped, Gross No definition available.
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| X | ||||||||||
- Definition Acquired Gas and Oil Area, Developed and Undeveloped, Net No definition available.
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| X | ||||||||||
- Definition Gas and Oil Area, Net Revenue Interest No definition available.
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| X | ||||||||||
- Definition Gas and Oil Area, Working Interest 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 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://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Face (par) amount of debt instrument at time of issuance. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Carrying value of amounts transferred to third parties for security purposes that are expected to be returned or applied towards payment after one year or beyond the operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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