CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (51,725)	$ (213,570)
Adjustments to reconcile net loss to net cash provided by (used for) operating activities:
Net loss on sales and exchange of oil and gas properties	907	111,830
Deferred income taxes	4,519	(114,785)
Leasehold impairments and other exploration costs	7,753	65,269
Impairment of oil and gas properties	24,460	2,387
Depreciation, depletion and amortization	74,865	182,462
Gain on derivative financial instruments	(674)	(627)
Settlements of derivative financial instruments	2,120
Net gain on extinguishment of debt	(89,576)	(4,532)
Amortization of debt discount, premium and issuance costs	2,533	2,564
Stock-based compensation	2,493	3,982
Excess income taxes from stock-based compensation		1,903
Decrease in accounts receivable	331	17,125
Decrease (increase) in other current assets	(346)	7,600
Decrease in accounts payable and accrued liabilities	(8,864)	(37,370)
Net cash provided by (used for) operating activities	(31,204)	24,238
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(33,654)	(197,263)
Proceeds from asset sales	2,067
Net cash used for investing activities	(31,587)	(197,263)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings		740,000
Payments to retire debt	(3,397)	(420,288)
Debt and equity issuance costs	(93)	(16,115)
Tax withholdings related to restricted stock	(313)	(526)
Excess income taxes from stock-based compensation		(1,903)
Net cash provided by (used for) financing activities	(3,803)	301,168
Net increase (decrease) in cash and cash equivalents	(66,594)	128,143
Cash and cash equivalents, beginning of period	134,006	2,071
Cash and cash equivalents, end of period	$ 67,412	$ 130,214