CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Operating activities:
Net loss	$ (316,646)	$ (90,910)
Adjustments to reconcile net loss to net cash provided from operating activities:
Deferred income tax benefit	(173,526)	(39,609)
Depletion, depreciation and amortization and impairment	285,991	299,185
Exploration dry hole costs	0	106
Abandonment and impairment of unproved properties	17,687	23,821
Derivative fair value loss (income)	75,890	(88,048)
Cash settlements on derivative financial instruments	207,544	222,716
Allowance for bad debt	450	250
Amortization of deferred financing costs, loss on extinguishment of debt and other	3,437	3,090
Deferred and stock-based compensation	71,718	19,792
Loss (gain) on the sale of assets	4,947	(2,734)
Changes in working capital:
Accounts receivable	41,955	73,695
Inventory and other	10,500	(3,749)
Accounts payable	(19,194)	3,492
Accrued liabilities and other	(41,149)	(50,955)
Net cash provided from operating activities	169,604	370,142
Investing activities:
Additions to natural gas and oil properties	(241,109)	(671,166)
Additions to field service assets	(1,304)	(1,574)
Acreage purchases	(23,554)	(51,450)
Other	0	(75)
Proceeds from disposal of assets	190,803	14,301
Purchases of marketable securities held by the deferred compensation plan	(22,115)	(19,897)
Proceeds from the sales of marketable securities held by the deferred compensation plan	22,997	24,992
Net cash used in investing activities	(74,282)	(704,869)
Financing activities:
Borrowings on credit facilities	647,000	1,009,000
Repayments on credit facilities	(739,000)	(1,368,000)
Issuance of senior notes	0	750,000
Debt issuance costs	(124)	(13,929)
Dividends paid	(6,796)	(13,534)
Change in cash overdrafts	(6,804)	(35,921)
Proceeds from the sales of common stock held by the deferred compensation plan	10,313	7,184
Net cash (used in) provided from financing activities	(95,411)	334,800
(Decrease) increase in cash and cash equivalents	(89)	73
Cash and cash equivalents at beginning of period	471	448
Cash and cash equivalents at end of period	$ 382	$ 521