Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Operating activities
Net income	$ 61,015	$ 78,463
Adjustments to reconcile net cash provided from operating activities:
(Gain) loss from discontinued operations	(15,484)	19,542
Loss from equity method investments, net of distributions	24,899	1,830
Deferred income tax expense	35,345	61,569
Depletion, depreciation, amortization and proved property impairment	282,810	208,855
Exploration dry hole costs	2,515	1,661
Mark-to-market gain on gas and oil derivatives not designated as hedges	(67,093)	(23,885)
Abandonment and impairment of unproved properties	52,064	30,713
Unrealized derivative gain	(2,531)	(2,400)
Allowance for bad debts	446
Deferred and stock-based compensation	66,759	10,313
Amortization of deferred financing costs, loss on extinguishment of debt and other	23,753	8,892
Loss (gain) on sale of assets	1,280	(78,156)
Changes in working capital:
Accounts receivable	(29,579)	(1,735)
Inventory and other	875	(2,407)
Accounts payable	(19,705)	12,365
Accrued liabilities and other	(24,285)	4,142
Net cash provided from continuing operations	393,084	329,762
Net cash provided from discontinued operations	20,710	69,106
Net cash provided from operating activities	413,794	398,868
Investing activities
Additions to oil and gas properties	(855,354)	(540,532)
Additions to field service assets	(5,914)	(12,284)
Acreage and proved property purchases	(151,118)	(249,731)
Other assets		(45)
Proceeds from disposal of assets	66,213	327,454
Purchase of marketable securities held by the deferred compensation plan	(15,626)	(16,399)
Proceeds from the sales of marketable securities held by the deferred compensation plan	8,451	14,943
Net cash used in investing activities from continuing operations	(953,348)	(476,594)
Investing activities of discontinued operations	844,894	(49,221)
Net cash used in investing activities	(108,454)	(525,815)
Financing activities
Borrowing on credit facilities	490,826	784,000
Repayment on credit facilities	(764,826)	(943,000)
Dividends paid	(19,305)	(19,170)
Issuance of common stock	585	5,904
Issuance of subordinated notes	500,000	500,000
Repayment of subordinated notes	(413,698)	(202,458)
Debt issuance costs	(22,003)	(9,435)
Change in cash overdrafts	(39,761)	7,609
Proceeds from the sales of common stock held by the deferred compensation plan	11,878	4,808
Net cash (used in) provided from financing activities	(256,304)	128,258
Increase in cash and equivalents	49,036	1,311
Cash and cash equivalents at beginning of period	2,848	767
Cash and cash equivalents at end of period	$ 51,884	$ 2,078