Commitments and contingencies.

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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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-URI http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751

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Commitments and Contingencies (Details) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended		12 Months Ended
	Feb. 17, 2017	May 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2015
Drilling Rig Commitments
Commitments and Contingencies (Textual) [Abstract]
Maximum termination outstanding obligations of contracts			$ 32,738
Outside Operated Drilling Commitments
Commitments and Contingencies (Textual) [Abstract]
Maximum termination outstanding obligations of contracts			30,128
Loving County System Agreement
Commitments and Contingencies (Textual) [Abstract]
Agreement term					15 years
Deficiency fee required to be paid			12,600
Transportation and processing fee under the agreement			3,500	$ 3,200
Eddy County
Commitments and Contingencies (Textual) [Abstract]
Transportation and processing fee under the agreement			500
Capital Addition Purchase Commitments
Commitments and Contingencies (Textual) [Abstract]
Remaining commitments		$ 55,300
Payment for long-term purchase commitment			2,400
Remaining purchase obligation			3,100
Field Compression and Amine Gas Treatment
Commitments and Contingencies (Textual) [Abstract]
Remaining commitments			13,400
Payment for long-term purchase commitment			400
Remaining purchase obligation			13,000
Corporate Joint Venture \| San Mateo Midstream
Commitments and Contingencies (Textual) [Abstract]
Contractual obligation			$ 225,600
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			$ 58,800
Natural Gas Transportation and Fractionation Agreement \| Eddy County
Commitments and Contingencies (Textual) [Abstract]
Agreement term			7 years
Contractual obligation				$ 132,500