Acquisitions and Divestitures - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) - Jagged Peak $ in Thousands	Mar. 31, 2020 USD ($)
Business Acquisition [Line Items]
Cash	$ 53,347
Accounts receivable	76,141
Derivative assets	11,644
Other current assets	534
Proved oil and natural gas properties	1,538,808
Unproved oil and natural gas properties	1,505,521
Other property, plant and equipment	20,003
Operating lease right-of-use assets	11,090
Total assets acquired	3,217,088
Accounts payable and accrued expenses	146,874
Derivative liabilities	27,907
Operating lease liabilities	11,525
Deferred tax liabilities, net	367,340
Long-term debt	884,435
Asset retirement obligations	2,808
Total liabilities assumed	1,440,889
Estimated fair value of net assets acquired	$ 1,776,199