CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating activities:
Net income	$ 89,023,000	$ 17,941,000
Adjustments to reconcile net income to net cash provided from operating activities:
Deferred income tax (benefit) expense	(5,511,000)	38,295,000
Depletion, depreciation and amortization and impairment	417,974,000	510,172,000
Exploration dry hole costs	0	4,000
Abandonment and impairment of unproved properties	41,631,000	73,244,000
Derivative fair value (income) loss	(208,190,000)	151,890,000
Cash settlements on derivative financial instruments	138,349,000	(40,272,000)
Allowance for doubtful accounts	(141,000)	(1,250,000)
Amortization of deferred financing costs and other	4,862,000	4,163,000
Deferred and stock-based compensation	14,410,000	41,252,000
Loss (gain) on the sale of assets	30,663,000	(149,000)
Gain on extinguishment of debt	(2,985,000)	0
Changes in working capital:
Accounts receivable	241,514,000	(49,713,000)
Inventory and other	(4,024,000)	(822,000)
Accounts payable	(52,645,000)	(6,529,000)
Accrued liabilities and other	(155,499,000)	36,721,000
Net cash provided from operating activities	549,431,000	774,947,000
Investing activities:
Additions to natural gas and oil properties	(550,355,000)	(781,554,000)
Additions to field service assets	(803,000)	(1,230,000)
Acreage purchases	(39,795,000)	(50,461,000)
Proceeds from disposal of assets	784,527,000	24,339,000
Purchases of marketable securities held by the deferred compensation plan	(16,741,000)	(34,953,000)
Proceeds from the sales of marketable securities held by the deferred compensation plan	21,344,000	37,311,000
Net cash provided from (used in) investing activities	198,177,000	(806,548,000)
Financing activities:
Borrowings on credit facilities	1,730,000,000	1,602,000,000
Repayments on credit facilities	(2,345,000,000)	(1,547,000,000)
Repayment of senior notes	(90,274,000)	0
Dividends paid	(15,077,000)	(14,950,000)
Taxes paid for shares withheld	(3,371,000)	(3,143,000)
Debt issuance costs	0	(8,257,000)
Change in cash overdrafts	(24,744,000)	(5,653,000)
Proceeds from the sales of common stock held by the deferred compensation plan	667,000	8,513,000
Net cash (used in) provided from financing activities	(747,799,000)	31,510,000
Decrease in cash and cash equivalents	(191,000)	(91,000)
Cash and cash equivalents at beginning of period	545,000	448,000
Cash and cash equivalents at end of period	$ 354,000	$ 357,000