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- Definition

Contractual Obligation, Term

+ References

No definition available.

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- Definition

Long-term Purchase Commitment, Remaining Obligation

+ 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.

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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.

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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.

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- 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=82911808&loc=d3e14472-108349

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Commitments and Contingencies (Details) - USD ($) $ in Thousands		1 Months Ended		3 Months Ended				6 Months Ended
	Feb. 17, 2017	May 31, 2018	Apr. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2015	Jun. 30, 2018	Jun. 30, 2017
Drilling Rig Commitments
Commitments and Contingencies (Textual) [Abstract]
Maximum termination outstanding obligations of contracts				$ 32,439				$ 32,439
Outside Operated Drilling Commitments
Commitments and Contingencies (Textual) [Abstract]
Maximum termination outstanding obligations of contracts				47,190				47,190
Loving County System Agreement
Commitments and Contingencies (Textual) [Abstract]
Agreement term							15 years
Deficiency fee required to be paid								10,900
Transportation and processing fee under the agreement				4,000		$ 3,700		7,400	$ 6,800
Eddy County
Commitments and Contingencies (Textual) [Abstract]
Transportation and processing fee under the agreement				900				1,500
Capital Addition Purchase Commitments
Commitments and Contingencies (Textual) [Abstract]
Remaining commitments								55,300
Payment for long-term purchase commitment				1,100				3,600
Remaining purchase obligation				2,000				2,000
Field Compression and Amine Gas Treatment
Commitments and Contingencies (Textual) [Abstract]
Remaining commitments								19,900
Payment for long-term purchase commitment				6,000				6,500
Remaining purchase obligation				13,500				13,500
Corporate Joint Venture \| San Mateo Midstream
Commitments and Contingencies (Textual) [Abstract]
Contractual obligation				222,600				222,600
Rustler Breaks and Wolf Asset Area \| Corporate Joint Venture \| San Mateo Midstream
Commitments and Contingencies (Textual) [Abstract]
Term of contractual obligation	15 years
Rustler Breaks Asset Area \| Corporate Joint Venture \| San Mateo Midstream
Commitments and Contingencies (Textual) [Abstract]
Term of contractual obligation	15 years
Natural Gas Transportation Agreement \| Eddy County
Commitments and Contingencies (Textual) [Abstract]
Agreement term					18 years
Contractual obligation				45,800				$ 45,800
Natural Gas Transportation and Fractionation Agreement \| Eddy County
Commitments and Contingencies (Textual) [Abstract]
Agreement term								7 years
Contractual obligation				132,300				$ 132,300
16-Year Fixed Fee Natural Gas Transportation Agreement \| Eddy County
Commitments and Contingencies (Textual) [Abstract]
Agreement term			16 years
Contractual obligation				56,800				56,800
10-Year Fixed Fee Natural Gas Transportation Agreement \| Eddy County
Commitments and Contingencies (Textual) [Abstract]
Agreement term		10 years
Contractual obligation				200,600				200,600
Natural Gas Transportation Agreement \| Eddy County
Commitments and Contingencies (Textual) [Abstract]
Transportation and processing fee under the agreement				200				200
Contractual obligation				$ 4,600				$ 4,600