Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net income	$ 5,976	$ 26,182
(Income) loss from discontinued operations, net of income taxes	645	(23,658)
Adjustments to reconcile income from continuing operations to net cash provided by operating activities from continuing operations
Depreciation, depletion and amortization	64,594	45,697
Non-cash loss on derivatives, net	14,005	21,057
Stock-based compensation, net	12,161	6,483
Deferred Income Tax Expense (Benefit)	3,933	1,449
Non-cash interest expense, net	675	1,309
Other, net	1,101	(1,336)
Changes in operating assets and liabilities-
Accounts receivable	(12,471)	2,216
Accounts payable	9,891	29,337
Accrued liabilities	3,627	(16,398)
Other, net	(1,290)	(1,156)
Net cash provided by operating activities from continuing operations	102,847	91,182
Net cash used in operating activities from discontinued operations	(456)	(61)
Net cash provided by operating activities	102,391	91,121
Cash Flows From Investing Activities
Capital expenditures - oil and gas properties	(197,879)	(213,260)
Capital expenditures - other property and equipment	(187)	(999)
Proceeds from sales of oil and gas properties, net	2,865	9,063
Other, net	129	13,235
Net cash used in investing activities from continuing operations	(195,072)	(191,961)
Net cash provided by (used in) investing activities from discontinued operations	(2,229)	116,179
Net cash used in investing activities	(197,301)	(75,782)
Cash Flows From Financing Activities
Long-term borrowings under credit agreement	0	45,000
Repayments of long-term borrowings under credit agreement	0	(45,000)
Payments of debt issuance costs	(109)	(50)
Proceeds from stock options exercised	0	743
Net cash provided by (used in) financing activities from continuing operations	(109)	693
Net cash provided by financing activities from discontinued operations	0	3,000
Net cash provided by (used in) financing activities	(109)	3,693
Net increase (decrease) in cash and cash equivalents	(95,019)	19,032
Cash and Cash Equivalents, Beginning of Period	157,439	52,614
Cash and Cash Equivalents, End of Period	$ 62,420	$ 71,646