Supplemental Disclosures (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Supplemental Disclosures [Line Items]
Total accrued liabilities	$ 143,074	$ 119,158
Accrued evaluated and unproved and unevaluated property costs
Supplemental Disclosures [Line Items]
Total accrued liabilities	87,125	44,012
Accrued midstream properties costs
Supplemental Disclosures [Line Items]
Total accrued liabilities	5,587	12,776
Accrued lease operating expenses
Supplemental Disclosures [Line Items]
Total accrued liabilities	23,192	24,276
Accrued interest on debt
Supplemental Disclosures [Line Items]
Total accrued liabilities	2,825	18,315
Accrued asset retirement obligations
Supplemental Disclosures [Line Items]
Total accrued liabilities	409	623
Accrued partners’ share of joint interest charges
Supplemental Disclosures [Line Items]
Total accrued liabilities	9,073	7,407
Accrued payable related to purchased natural gas
Supplemental Disclosures [Line Items]
Total accrued liabilities	199	418
Other
Supplemental Disclosures [Line Items]
Total accrued liabilities	$ 14,664	$ 11,331