CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Operating activities:
Net (loss) income	$ (90,910)	$ 203,910
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	(39,609)	136,928
Depletion, depreciation and amortization and impairment	299,185	287,034
Exploration dry hole costs	106	1
Abandonment and impairment of unproved properties	23,821	19,327
Derivative fair value (income) loss	(88,048)	170,959
Cash settlements on derivative financial instruments that do not qualify for hedge accounting	222,716	(130,762)
Allowance for bad debt	250	250
Amortization of deferred financing costs, loss on extinguishment of debt and other	3,090	29,812
Deferred and stock-based compensation	19,792	47,912
Gain on the sale of assets	(2,734)	(281,711)
Changes in working capital:
Accounts receivable	73,695	1,275
Inventory and other	(3,749)	(6,872)
Accounts payable	3,492	20,115
Accrued liabilities and other	(50,955)	(59,751)
Net cash provided from operating activities	370,142	441,523
Investing activities:
Additions to natural gas and oil properties	(671,166)	(546,354)
Additions to field service assets	(1,574)	(5,119)
Acreage purchases	(51,450)	(110,471)
Equity method investments and other	(75)	1,103
Proceeds from disposal of assets	14,301	146,140
Purchases of marketable securities held by the deferred compensation plan	(19,897)	(11,251)
Proceeds from the sales of marketable securities held by the deferred compensation plan	24,992	13,343
Net cash used in investing activities	(704,869)	(512,609)
Financing activities:
Borrowing on credit facilities	1,009,000	1,175,000
Repayment on credit facilities	(1,368,000)	(1,195,000)
Issuance of senior notes	750,000	0
Repayment of subordinated notes	0	(312,000)
Debt issuance costs	(13,929)	0
Dividends paid	(13,534)	(13,114)
Issuance of common stock, net of offering expenses	0	396,662
Change in cash overdrafts	(35,921)	4,679
Proceeds from the sales of common stock held by the deferred compensation plan	7,184	14,803
Net cash provided from financing activities	334,800	71,030
Increase (decrease) in cash and cash equivalents	73	(56)
Cash and cash equivalents at beginning of period	448	348
Cash and cash equivalents at end of period	$ 521	$ 292