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Supplemental Information on Oil and Natural Gas Producing Activities (Unaudited) - Estimate of Changes in Standardized Measure of Discounted Future Net Cash Flows from Proved Reserves (Unaudited) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Increase (Decrease) in Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Roll Forward]      
Beginning present value $ 104,986 $ 364,290 $ 1,045,603
Changes during the year      
Revenues less production (122,964) (61,407) (155,772)
Net changes in prices, production and other costs 380,026 (135,652) (491,035)
Development costs incurred 83 0 90,591
Net changes in future development costs 446 (2,167) 450,162
Extensions and discoveries 0 0 11,921
Revisions of previous quantity estimates 112,926 (99,533) (478,238)
Accretion of discount 6,016 36,429 101,778
Purchases of reserves in-place 15,541 4,744 0
Sales of reserves in-place (29,792) (1,067) (3,331)
Timing differences and other (34,354) (651) (207,389)
Net change for the year 327,928 (259,304) (681,313)
Ending present value $ 432,914 $ 104,986 $ 364,290