CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income (loss)	$ (182,952)	$ (465,605)	$ 58,729
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Depreciation, depletion, amortization and accretion expense	454,123	414,087	380,320
Write-down of oil and natural gas properties and other well inventory	23,729	268,615	12,386
Amortization of deferred financing costs and original issue discount	13,382	6,804	5,207
Equity based compensation expense	10,992	8,669	6,964
Price risk management activities expense (income)	419,077	(87,685)	95,337
Net cash received (paid) on settled derivative instruments	(290,164)	143,905	(8,820)
Loss (gain) on extinguishment of debt	13,225	(1,662)	0
Settlement of asset retirement obligations	(67,988)	(43,933)	(75,331)
Gain on sale of assets	(687)	0	0
Changes in operating assets and liabilities:
Accounts receivable	(35,396)	(34,645)	5,788
Other current assets	(18,901)	35,934	(15,114)
Accounts payable	(6,261)	27,096	7,523
Other current liabilities	64,800	4,200	(35,459)
Other non-current assets and liabilities, net	14,409	26,143	(43,797)
Net cash provided by operating activities	411,388	301,923	393,733
Cash flows from investing activities:
Exploration, development and other capital expenditures	(293,331)	(362,942)	(463,409)
Cash paid for acquisitions, net of cash acquired	(5,399)	(315,962)	(37,916)
Proceeds from sale of property and equipment, net	4,983	0	5,369
Net cash used in investing activities	(293,747)	(678,904)	(495,956)
Cash flows from financing activities:
Proceeds from issuance of common stock	0	71,100	0
Issuance of senior notes	600,500	0	0
Redemption of senior notes and other long-term debt	(356,803)	(5,364)	(10,567)
Proceeds from Bank Credit Facility	100,000	350,000	110,000
Repayment of Bank Credit Facility	(365,000)	(60,000)	(25,000)
Deferred financing costs	(27,833)	(1,287)	(1,963)
Other Deferred Payments	(7,921)	(11,921)	(9,921)
Payments of finance lease	(21,804)	(17,509)	(14,133)
Employee stock awards tax withholdings	(3,161)	(827)	(333)
Net cash provided by (used in) financing activities	(82,022)	324,192	48,083
Net increase (decrease) in cash and cash equivalents	35,619	(52,789)	(54,140)
Cash, cash equivalents
Balance, beginning of period	34,233	87,022	141,162
Balance, end of period	69,852	34,233	87,022
Supplemental non-cash transactions:
Capital expenditures included in accounts payable and accrued liabilities	45,761	74,957	90,956
Debt exchanged for common stock	0	35,960	0
Supplemental cash flow information:
Interest paid, net of amounts capitalized	$ 68,891	$ 67,443	$ 62,571