CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Operating activities:
Net (loss) income	$ (391,858)	$ 350,328
Adjustments to reconcile net (loss) income to net cash provided from operating activities:
Loss from equity method investments, net of distributions	0	3,096
Deferred income tax (benefit) expense	(174,390)	230,450
Depletion, depreciation and amortization and impairment	955,411	429,484
Exploration dry hole costs	87	1
Abandonment and impairment of unproved properties	36,187	32,771
Derivative fair value (income) loss	(290,052)	28,902
Cash settlements on derivative financial instruments that do not qualify for hedge accounting	360,645	(113,859)
Allowance for bad debt	600	250
Amortization of deferred financing costs, loss on extinguishment of debt and other	27,572	31,430
Deferred and stock-based compensation	(10,679)	15,486
Gain on the sale of assets	(2,053)	(281,878)
Changes in working capital:
Accounts receivable	79,448	13,098
Inventory and other	(7,073)	(5,335)
Accounts payable	(13,158)	(13,355)
Accrued liabilities and other	(55,127)	(65,931)
Net cash provided from operating activities	515,560	654,938
Investing activities:
Additions to natural gas and oil properties	(901,227)	(867,285)
Additions to field service assets	(2,878)	(9,492)
Acreage purchases	(61,213)	(145,543)
Other	(75)	1,103
Proceeds from disposal of assets	14,825	147,126
Purchases of marketable securities held by the deferred compensation plan	(23,594)	(23,053)
Proceeds from the sales of marketable securities held by the deferred compensation plan	28,168	25,206
Net cash used in investing activities	(945,994)	(871,938)
Financing activities:
Borrowing on credit facilities	1,940,000	1,682,000
Repayment on credit facilities	(1,676,000)	(1,533,000)
Issuance of senior notes	750,000	0
Repayment of subordinated notes	(516,875)	(312,000)
Debt issuance costs	(14,156)	0
Dividends paid	(20,308)	(19,862)
Issuance of common stock, net of offering expenses	0	396,580
Change in cash overdrafts	(40,123)	(12,305)
Proceeds from the sales of common stock held by the deferred compensation plan	7,938	15,707
Net cash provided from financing activities	430,476	217,120
Increase in cash and cash equivalents	42	120
Cash and cash equivalents at beginning of period	448	348
Cash and cash equivalents at end of period	$ 490	$ 468