Commitments and Contingencies (Details Textual) - USD ($) $ in Millions			1 Months Ended	12 Months Ended
	Feb. 25, 2019	Feb. 17, 2017	Oct. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Long-term Purchase Commitment [Line Items]
Minimum outstanding commitments				$ 26.9
Delivery Of Natural Gas And Oil Production To Third Parties
Long-term Purchase Commitment [Line Items]
Payment for other commitment				28.7	$ 20.6
Other commitment				406.8
Drilling Rig Commitments
Long-term Purchase Commitment [Line Items]
Maximum termination outstanding obligations of contracts				41.7
Short-Term Drilling Rig Commitments
Long-term Purchase Commitment [Line Items]
Maximum termination outstanding obligations of contracts				1.2
Corporate Joint Venture | San Mateo Midstream
Long-term Purchase Commitment [Line Items]
Related party transaction, contract agreement term	15 years
Contractual obligation				$ 152.9
Natural Gas Transportation Agreement
Long-term Purchase Commitment [Line Items]
Supply agreement, term			15 years
Natural Gas Transportation and Fractionation Agreement | Eddy County
Long-term Purchase Commitment [Line Items]
Supply agreement, term				7 years
Contractual obligation				$ 132.3
2019 15-Year Fixed Fee Natural Gas Transportation Agreement | Eddy County
Long-term Purchase Commitment [Line Items]
Contractual obligation			$ 106.9
Operational Agreements | San Mateo Midstream
Long-term Purchase Commitment [Line Items]
Contractual obligation	$ 363.8
Engineering, Procurement, Construction And Installation Of Processing Plant | San Mateo Midstream
Long-term Purchase Commitment [Line Items]
Contractual obligation				80.4
Payment for purchase agreement				40.1
Contractual obligation, due in next fiscal year				$ 40.3
Rustler Breaks Asset Area | Corporate Joint Venture | San Mateo Midstream
Long-term Purchase Commitment [Line Items]
Contractual obligation, term		15 years