CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating activities:
Net income (loss)	$ 411,778,000	$ (711,777,000)	$ (1,716,297,000)
Adjustments to reconcile net income (loss) to net cash provided from operating activities
Deferred income tax benefit	(17,727,000)	(25,029,000)	(506,438,000)
Depletion, depreciation and amortization and impairment of proved properties	364,555,000	473,285,000	1,644,477,000
Exploration dry hole costs	0	888,000	(11,000)
Abandonment and impairment of unproved properties	7,206,000	19,334,000	1,235,342,000
Derivative fair value loss (income)	650,216,000	(187,711,000)	(226,681,000)
Cash settlements on derivative financial instruments	(520,013,000)	(322,629,000)	(188,384,000)
Divestiture contract obligation	20,340,000	499,934,000
Allowance for bad debt	200,000	400,000	4,341,000
Amortization of deferred financing costs and other	8,347,000	6,919,000	6,455,000
Deferred and stock-based compensation	110,356,000	48,552,000	24,891,000
(Gain) loss on the sale of assets	(701,000)	(110,791,000)	30,256,000
Loss (gain) on early extinguishment of debt	98,000	(14,068,000)	(5,415,000)
Changes in working capital:
Accounts receivable	(250,538,000)	24,539,000	214,196,000
Prepaid and other	(1,140,000)	1,010,000	4,520,000
Accounts payable	39,231,000	(32,686,000)	(60,374,000)
Accrued liabilities and other	(29,260,000)	(46,748,000)	(155,803,000)
Net cash provided from operating activities	792,948,000	268,680,000	681,843,000
Investing activities:
Additions to natural gas and oil properties	(393,478,000)	(405,617,000)	(687,277,000)
Additions to field service assets	(1,231,000)	(2,873,000)	(1,162,000)
Acreage purchases	(23,962,000)	(26,816,000)	(59,986,000)
Proceeds from disposal of assets	303,000	246,127,000	784,937,000
Purchases of marketable securities held by the deferred compensation plan	(30,806,000)	(17,076,000)	(19,039,000)
Proceeds from the sales of marketable securities held by the deferred compensation plan	31,295,000	22,173,000	22,005,000
Net cash (used in) provided from investing activities	(417,879,000)	(184,082,000)	39,478,000
Financing activities:
Borrowings on credit facilities	1,434,000,000	2,076,000,000	2,311,000,000
Repayments on credit facilities	(2,136,000,000)	(1,851,000,000)	(2,777,000,000)
Issuance of senior notes	600,000,000	850,000,000
Repayment of senior or senior subordinated notes	(63,324,000)	(1,120,634,000)	(195,432,000)
Dividends paid	0		(20,070,000)
Treasury stock purchases	0	(22,992,000)	(6,908,000)
Debt issuance costs	(8,854,000)	(13,608,000)	(4,446,000)
Taxes paid for shares withheld	(9,299,000)	(3,324,000)	(3,384,000)
Change in cash overdrafts	16,493,000	176,000	(25,747,000)
Proceeds from the sales of common stock held by the deferred compensation plan	5,879,000	696,000	667,000
Net cash used in financing activities	(161,105,000)	(84,686,000)	(721,320,000)
(Decrease) increase in cash and cash equivalents	213,964,000	(88,000)	1,000
Cash and cash equivalents at beginning of year	458,000	546,000	545,000
Cash and cash equivalents at end of year	$ 214,422,000	$ 458,000	$ 546,000