CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Operating activities:
Net income	$ 350,328	$ 87,551
Adjustments to reconcile net income to net cash provided from operating activities:
Loss (gain) from equity method investments, net of distributions	3,096	(1,174)
Deferred income tax expense	230,450	62,180
Depletion, depreciation and amortization and impairment	429,484	373,192
Exploration dry hole costs	1	3,904
Abandonment and impairment of unproved properties	32,771	46,066
Derivative fair value loss	28,902	2,470
Cash settlements on derivative financial instruments that do not qualify for hedge accounting	(113,859)	(28,335)
Allowance for bad debt	250	250
Amortization of deferred financing costs, loss on extinguishment of debt and other	31,430	19,735
Deferred and stock-based compensation	15,486	74,187
Gain on the sale of assets	(281,878)	(89,129)
Changes in working capital:
Accounts receivable	13,098	6,508
Inventory and other	(5,335)	3,259
Accounts payable	(13,355)	(29,234)
Accrued liabilities and other	(65,931)	(28,564)
Net cash provided from operating activities	654,938	502,866
Investing activities:
Additions to natural gas and oil properties	(867,285)	(907,813)
Additions to field service assets	(9,492)	(4,326)
Acreage purchases	(145,543)	(70,187)
Equity method investments	1,103	3,799
Proceeds from disposal of assets	147,126	311,748
Purchases of marketable securities held by the deferred compensation plan	(23,053)	(23,729)
Proceeds from the sales of marketable securities held by the deferred compensation plan	25,206	19,375
Net cash used in investing activities	(871,938)	(671,133)
Financing activities:
Borrowing on credit facilities	1,682,000	1,310,000
Repayment on credit facilities	(1,533,000)	(1,622,000)
Issuance of subordinated notes		750,000
Repayment of subordinated notes	(312,000)	(259,063)
Dividends paid	(19,862)	(19,593)
Debt issuance costs		(12,448)
Issuance of common stock, net of offering expenses	396,580	343
Change in cash overdrafts	(12,305)	4,704
Proceeds from the sales of common stock held by the deferred compensation plan	15,707	16,327
Net cash provided from financing activities	217,120	168,270
Increase in cash and cash equivalents	120	3
Cash and cash equivalents at beginning of period	348	252
Cash and cash equivalents at end of period	$ 468	$ 255