Commitments and contingencies.

No definition available.

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- Definition

Contractual Obligation, Term

+ References

No definition available.

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- Definition

Future undiscounted minimum payments

+ References

No definition available.

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- Definition

Minimum delivery commitment to avoid paying gas deficiency fee.

+ References

No definition available.

+ Details

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- Definition

Natural gas processing and transportation agreement maturity period.

+ References

No definition available.

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- Definition

Payment for Long-term Purchase Commitment

+ References

No definition available.

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- Definition

Supply Agreement, Term

+ References

No definition available.

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- Definition

Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments.

+ References

No definition available.

+ Details

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- Definition

Cost incurred related to the gas activities, such as transportation, marketing and processing crude oil, natural gas and refined petroleum products.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e62136-109447

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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- Definition

The minimum amount the entity agreed to spend under the long-term purchase commitment.

+ References

No definition available.

+ Details

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- Definition

Period covered by the long-term purchase commitment, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- Definition

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

+ References

No definition available.

+ Details

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Period Type:	instant

- Definition

Best estimate of the loss exposure for a reasonably possible liability for product liability damages for which no accrual has been recorded.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14472-108349

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Commitments and Contingencies (Details) - USD ($) $ in Thousands			1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Feb. 17, 2017	May 31, 2017	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2015
Commitments and Contingencies (Textual) [Abstract]
Natural gas processing and transportation agreement						5 years
Minimum delivery commitment to avoid paying gas deficiency fee						80.00%
Transportation and processing fee under the agreement				$ 500	$ 800	$ 1,000	$ 1,700
Drilling Rig Commitments
Commitments and Contingencies (Textual) [Abstract]
Maximum termination outstanding obligations of contracts	$ 41,974			41,974		41,974
Outside Operated Drilling Commitments
Commitments and Contingencies (Textual) [Abstract]
Maximum termination outstanding obligations of contracts	19,697			19,697		19,697
Eagle Ford Acreage Agreement [Member]
Commitments and Contingencies (Textual) [Abstract]
Future undiscounted minimum payments, minimum	200			200		200
Loving County System Agreement
Commitments and Contingencies (Textual) [Abstract]
Transportation and processing fee under the agreement				3,700	$ 2,800	6,800	$ 4,700
Agreement term								15 years
Deficiency fee required to be paid						11,600
Capital Addition Purchase Commitments [Member]
Commitments and Contingencies (Textual) [Abstract]
Remaining commitments	47,000		$ 56,900
Payment for long-term purchase commitment				7,900		$ 9,900
Term Of Old Contract Drilling Rig
Commitments and Contingencies (Textual) [Abstract]
Purchase commitment term						2 years
Corporate Joint Venture [Member] \| San Mateo Midstream [Member]
Commitments and Contingencies (Textual) [Abstract]
Contractual obligation	$ 256,400			$ 256,400		$ 256,400
Rustler Breaks and Wolf Asset Area [Member] \| Corporate Joint Venture [Member] \| San Mateo Midstream [Member]
Commitments and Contingencies (Textual) [Abstract]
Term of contractual obligation		15 years
Rustler Breaks Asset Area [Member] \| Corporate Joint Venture [Member] \| San Mateo Midstream [Member]
Commitments and Contingencies (Textual) [Abstract]
Term of contractual obligation		15 years