CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating activities:
Net (loss) income	$ (681,642)	$ 89,023
Adjustments to reconcile net (loss) income to net cash provided from
Deferred income tax benefit	(97,947)	(5,511)
Depletion, depreciation and amortization and impairment of proved properties and other assets	382,734	417,974
Abandonment and impairment of unproved properties	16,604	41,631
Derivative fair value income	(102,182)	(208,190)
Cash settlements on derivative financial instruments	305,243	138,349
Divestiture contract obligation	486,689	0
Allowance for bad debt	400	(141)
Amortization of deferred financing costs and other	5,023	4,862
Deferred and stock-based compensation	38,380	14,410
Loss (gain) on the sale of assets	(112,443)	30,663
Loss (gain) on early extinguishment of debt	(14,093)	(2,985)
Changes in working capital:
Accounts receivable	91,343	241,514
Other current assets	(5,786)	(4,024)
Accounts payable	(52,820)	(52,645)
Accrued liabilities and other	(80,529)	(155,499)
Net cash provided from operating activities	178,974	549,431
Investing activities:
Additions to natural gas properties	(321,849)	(550,355)
Additions to field service assets	(2,493)	(803)
Acreage purchases	(18,554)	(39,795)
Proceeds from disposal of assets	246,083	784,527
Purchases of marketable securities held by the deferred compensation plan	(14,855)	(16,741)
Proceeds from the sales of marketable securities held by the deferred compensation plan	20,974	21,344
Net cash (used in) provided from investing activities	(90,694)	198,177
Financing activities:
Borrowings on credit facilities	1,676,000	1,730,000
Repayments on credit facilities	(1,447,000)	(2,345,000)
Issuance of senior notes	850,000	0
Repayment of senior or senior subordinated notes	(1,120,634)	(90,274)
Dividends paid	0	(15,077)
Treasury stock purchases	(22,992)	0
Debt issuance costs	(12,735)	0
Taxes paid for shares withheld	(2,841)	(3,371)
Change in cash overdrafts	(8,797)	(24,744)
Proceeds from the sales of common stock held by the deferred compensation plan	690	667
Net cash used in financing activities	(88,309)	(747,799)
Decrease in cash and cash equivalents	(29)	(191)
Cash and cash equivalents at beginning of period	546	545
Cash and cash equivalents at end of period	$ 517	$ 354