CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	$ 1,165	$ (27,144)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Loss from discontinued operations		2,627
Gain on sale of assets		(7,877)
Deferred income taxes	674	(12,245)
Dry hole costs and lease impairments		2,443
Depreciation, depletion and amortization	88,874	84,967
Loss on derivative financial instruments	4,946	6,447
Settlements of derivative financial instruments	(1,297)	2,320
Debt issuance cost and discount amortization	1,163	1,587
Stock-based compensation	2,263	3,218
Excess income taxes from stock-based compensation	1,098	1,742
Increase in accounts receivable	(22,876)	(19,059)
Increase in other current assets	(554)	(185)
Increase in accounts payable and accrued liabilities	20,285	34,981
Net cash provided by continuing operations	95,741	73,822
Net cash provided by discontinued operations		23,530
Net cash provided by operating activities	95,741	97,352
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(237,460)	(62,058)
Proceeds from sales of marketable securities		13,392
Investing activities of continuing operations	(237,460)	(48,666)
Investing activities of discontinued operations		(52,994)
Net cash used for investing activities	(237,460)	(101,660)
CASH FLOWS FROM FINANCING ACTIVITIES:
Borrowings	150,000	35,000
Principal payments on debt		(25,000)
Debt issuance costs	(50)	(11)
Tax withholdings related to restricted stock	(2,349)	(1,566)
Excess income taxes from stock-based compensation	(1,098)	(1,742)
Dividends paid	(5,980)
Net cash provided by financing activities	140,523	6,681
Net increase (decrease) in cash and cash equivalents	(1,196)	2,373
Cash and cash equivalents, beginning of period	2,967	4,471
Cash and cash equivalents, end of period	$ 1,771	$ 6,844