CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
NET LOSS	$ (193,554)us-gaap_NetIncomeLoss	$ (83,645)us-gaap_NetIncomeLoss
Adjustments to reconcile net loss to net cash provided by operating activities:
(Gains) losses on commodity derivative contracts - net	(21,372)	22,673
Net cash received (paid) for commodity derivative contracts	52,608	(14,810)
Asset retirement accretion	445	497
Depreciation, depletion, and amortization	58,428	66,901
Impairment in carrying value of oil and gas properties	174,667us-gaap_ImpairmentOfOilAndGasProperties	86,471us-gaap_ImpairmentOfOilAndGasProperties
Share-based compensation, net of amounts capitalized to oil and gas properties	801us-gaap_ShareBasedCompensation	1,541us-gaap_ShareBasedCompensation
Deferred income taxes	(9,041)us-gaap_DeferredIncomeTaxExpenseBenefit	(2,270)us-gaap_DeferredIncomeTaxExpenseBenefit
Amortization of deferred financing costs	1,869us-gaap_AmortizationOfFinancingCosts	2,386us-gaap_AmortizationOfFinancingCosts
Change in operating assets and liabilities:
Accounts receivable - oil and gas sales	27,572	(2,767)
Accounts receivable - JIB and other	13,475	(8,116)
Other current and noncurrent assets	(1,089)	(3,972)
Accounts payable	322	2,813
Accrued liabilities	8,106	37,170
Other	(220)	537
Net cash provided by operating activities	113,017	105,409
CASH FLOWS FROM INVESTING ACTIVITIES:
Investment in property and equipment	(111,167)	(122,780)
Net cash used in investing activities	(111,167)	(122,780)
CASH FLOWS FROM FINANCING ACTIVITIES:
Deferred financing costs	(1,161)us-gaap_PaymentsOfLoanCosts	(495)us-gaap_PaymentsOfLoanCosts
Acquisition of treasury stock	(305)	(649)
Net cash used in financing activities	(1,466)	(1,144)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	384	(18,515)
Cash and cash equivalents, beginning of period	11,557	33,163
Cash and cash equivalents, end of period	11,941	14,648
SUPPLEMENTAL INFORMATION:
Non-cash transactions - investments in property and equipment accrued - not paid	71,900	134,000
Cash paid for interest, net of capitalized interest of $1.0 million and $4.6 million, respectively	$ 2,321us-gaap_InterestPaidNet

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Future cash outflow to pay for purchases of fixed assets that have occurred.

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The difference between the book value and the sale price of agreements to purchase or sell mineral resources, energy, and agricultural products at some future point. This element refers to the gain (loss) included in earnings and not to the cash proceeds.

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