CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating activities:
Net (loss) income	$ (521,388)	$ (713,685)	$ 634,382
Adjustments to reconcile net (loss) income to net cash provided from operating activities:
Loss from equity method investments, net of distributions	0	0	3,095
Deferred income tax (benefit) expense	(280,848)	(338,706)	396,502
Depletion, depreciation and amortization and impairment	567,142	1,171,329	579,056
Exploration dry hole and impairment costs	18	88	16,145
Abandonment and impairment of unproved properties	30,076	47,619	47,079
Derivative fair value loss (income)	261,391	(416,364)	(383,520)
Cash settlements on derivative financial instruments that do not qualify for hedge accounting	347,336	532,122	(42,634)
Allowance for bad debt	800	2,300	250
Amortization of deferred financing costs, loss on extinguishment of debt and other	7,170	29,383	24,694
Deferred and stock-based compensation	74,685	(20,411)	(4,295)
Loss (gain) on the sale of assets	7,074	406,856	(285,638)
Changes in working capital:
Accounts receivable	(20,586)	64,704	(5,329)
Inventory and other	6,220	(14,868)	(4,521)
Accounts payable	(27,259)	(26,197)	(1,023)
Accrued liabilities and other	(64,763)	(32,768)	110
Net cash provided from operating activities	387,068	691,402	974,353
Investing activities:
Additions to natural gas and oil properties	(466,252)	(1,030,644)	(1,200,419)
Additions to field service assets	(3,052)	(4,441)	(11,863)
Acreage purchases	(43,482)	(74,880)	(211,971)
MRD Merger, net of cash acquired	7,180	0	0
Other	0	(75)	1,103
Proceeds from disposal of assets	193,755	890,901	180,508
Purchases of marketable securities held by the deferred compensation plan	(37,019)	(28,876)	(30,898)
Proceeds from the sales of marketable securities held by the deferred compensation plan	40,035	29,243	28,084
Net cash used in investing activities	(308,835)	(218,772)	(1,245,456)
Financing activities:
Borrowings on credit facilities	2,274,000	2,271,000	2,107,000
Repayments on credit facilities	(1,487,000)	(2,899,000)	(1,884,000)
Issuance of senior notes	0	750,000	0
Repayment of senior or senior subordinated notes	(273,012)	(516,875)	(312,000)
Dividends paid	(16,682)	(27,083)	(26,610)
Debt issuance costs	(6,342)	(14,156)	(8,866)
Issuance of common stock	0	0	396,562
Taxes paid for shares withheld	(3,849)	(7,702)	(20,218)
Change in cash overdrafts	18,393	(37,089)	3,371
Proceeds from the sales of common stock held by the deferred compensation plan	13,102	8,298	15,964
Net cash (used in) provided from financing activities	(78,390)	(472,607)	271,203
(Decrease) increase in cash and cash equivalents	(157)	23	100
Cash and cash equivalents at beginning of year	471	448	348
Cash and cash equivalents at end of year	314	471	448
MRD
Financing activities:
Repayments on credit facilities	$ (597,000)	$ 0	$ 0