Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Operating activities
Net income	$ 26,260	$ 86,631
Adjustments to reconcile net cash provided from operating activities:
(Gain) loss from discontinued operations	(13,915)	8,721
Loss from equity method investments, net of distributions	19,259	985
Deferred income tax expense	12,798	60,775
Depletion, depreciation, amortization and proved property impairment	150,510	139,126
Exploration dry hole costs	6
Mark-to-market gain on gas and oil derivatives not designated as hedges	(8,103)	(42,169)
Abandonment and impairment of unproved properties	35,437	16,278
Unrealized derivative gain	(6,502)	(11)
Allowance for bad debts	(404)
Deferred and stock-based compensation	48,161	5,866
Amortization of deferred financing costs, loss on extinguishment of debt and other	19,891	2,367
Loss (gain) on sale of assets	1,483	(78,089)
Changes in working capital:
Accounts receivable	(4,159)	8,061
Inventory and other	2,747	338
Accounts payable	(6,222)	13,859
Accrued liabilities and other	(436)	(14,038)
Net cash provided from continuing operations	276,811	208,700
Net cash provided from discontinued operations	36,802	51,737
Net cash provided from operating activities	313,613	260,437
Investing activities
Additions to oil and gas properties	(535,307)	(322,395)
Additions to field service assets	(2,830)	(10,270)
Acreage and proved property purchases	(73,070)	(187,192)
Other assets		(45)
Proceeds from disposal of assets	23,409	318,632
Purchase of marketable securities held by the deferred compensation plan	(8,832)	(14,553)
Proceeds from the sales of marketable securities held by the deferred compensation plan	6,620	13,296
Net cash used in investing activities from continuing operations	(590,010)	(202,527)
Investing activities of discontinued operations	835,147	(27,011)
Net cash provided from (used in) investing activities	245,137	(229,538)
Financing activities
Borrowing on credit facilities	490,826	371,000
Repayment on credit facilities	(764,826)	(220,000)
Dividends paid	(12,860)	(12,768)
Issuance of common stock	554	5,785
Issuance of subordinated notes	500,000
Repayment of subordinated notes	(413,332)
Debt issuance costs	(21,653)
Change in cash overdrafts	(58,265)	(13,385)
Proceeds from the sales of common stock held by the deferred compensation plan	6,797	4,560
Net cash (used in) provided from financing activities	(272,759)	135,192
Increase in cash and equivalents	285,991	166,091
Cash and cash equivalents at beginning of period	2,848	767
Cash and cash equivalents at end of period	$ 288,839	$ 166,858