Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities
Net loss	$ (427,348)	$ (213,992)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, Depletion, Amortization and Accretion	1,322,280	1,286,158
Property impairments	202,728	321,130
Non-cash (gain) loss on derivatives, net	105,009	(26,011)
Stock-based compensation	34,274	40,290
Benefit for deferred income taxes	(259,256)	(98,645)
Tax deficiency (benefit) from stock-based compensation	9,460	(13,177)
Dry hole costs	233	8,183
Gain on sale of assets, net	(103,174)	(22,930)
Other, net	7,166	10,143
Changes in assets and liabilities:
Accounts receivable	(2,634)	351,309
Inventories	1,257	9,137
Other current assets	390	64,271
Accounts payable trade	(43,131)	(178,000)
Revenues and royalties payable	(11,102)	(45,030)
Accrued liabilities and other	22,411	(78,947)
Other noncurrent assets and liabilities	5,325	1,603
Net cash provided by operating activities	863,888	1,415,492
Cash flows from investing activities
Exploration and development	(878,928)	(2,598,367)
Purchase of producing crude oil and natural gas properties	(29)	(557)
Purchase of other property and equipment	(5,569)	(31,991)
Proceeds from sale of assets	334,305	33,216
Net cash used in investing activities	(550,221)	(2,597,699)
Cash flows from financing activities
Credit facility borrowings	915,000	1,780,000
Repayment of credit facility	(1,203,000)	(600,000)
Repayment of other debt	(1,601)	(1,552)
Debt issuance costs	(40)	(2,110)
Repurchase of restricted stock for tax withholdings	(6,540)	(5,818)
Tax (deficiency) benefit from stock-based compensation	(9,460)	13,177
Net cash (used in) provided by financing activities	(305,641)	1,183,697
Effect of Exchange Rate on Cash and Cash Equivalents	7	(8,916)
Net change in cash and cash equivalents	8,033	(7,426)
Cash and cash equivalents at beginning of period	11,463	24,381
Cash and cash equivalents at end of period	$ 19,496	$ 16,955