Supplemental Disclosures (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Summary of current accrued liabilities
Total accrued liabilities	$ 119,158	$ 200,695
Other	11,331	12,378
Accrued evaluated and unproved and unevaluated property costs
Summary of current accrued liabilities
Total accrued liabilities	44,012	72,376
Accrued midstream properties costs
Summary of current accrued liabilities
Total accrued liabilities	12,776	46,402
Accrued lease operating expenses
Summary of current accrued liabilities
Total accrued liabilities	24,276	18,223
Accrued interest on debt
Summary of current accrued liabilities
Total accrued liabilities	18,315	18,569
Accrued asset retirement obligations
Summary of current accrued liabilities
Total accrued liabilities	623	619
Accrued partners’ share of joint interest charges
Summary of current accrued liabilities
Total accrued liabilities	7,407	14,322
Accrued payable related to purchased natural gas
Summary of current accrued liabilities
Total accrued liabilities	$ 418	$ 17,806