Commitments and Contingencies (Details Textual) - USD ($) $ in Millions		1 Months Ended	12 Months Ended
	Feb. 17, 2017	Oct. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Feb. 25, 2019
Delivery Of Natural Gas And Oil Production To Third Parties
Long-term Purchase Commitment [Line Items]
Payment for other commitment			$ 46.0	$ 28.7
Other commitment			523.1
Drilling Rig Commitments
Long-term Purchase Commitment [Line Items]
Maximum termination outstanding obligations of contracts			20.6
Minimum outstanding commitments			$ 44.6
Drilling Rig Commitments | Minimum
Long-term Purchase Commitment [Line Items]
Purchase commitment period			3 years
Drilling Rig Commitments | Maximum
Long-term Purchase Commitment [Line Items]
Purchase commitment period			5 years
Corporate Joint Venture | San Mateo Midstream
Long-term Purchase Commitment [Line Items]
Contractual obligation			$ 153.5
2019 15-Year Fixed Fee Natural Gas Transportation Agreement | Eddy County
Long-term Purchase Commitment [Line Items]
Supply agreement, term		15 years
Contractual obligation		$ 106.9
Operational Agreements | San Mateo Midstream
Long-term Purchase Commitment [Line Items]
Contractual obligation					$ 340.3
Engineering, Procurement, Construction And Installation Of Processing Plant | San Mateo Midstream
Long-term Purchase Commitment [Line Items]
Contractual obligation			81.3
Payment for purchase agreement			$ 41.2
Rustler Breaks Asset Area | Corporate Joint Venture | San Mateo Midstream
Long-term Purchase Commitment [Line Items]
Contractual obligation, term	15 years
Rustler Breaks and Wolf Asset Area | Corporate Joint Venture | San Mateo Midstream
Long-term Purchase Commitment [Line Items]
Contractual obligation, term	15 years