Consolidated Balance Sheets (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 51,884	$ 2,848
Accounts receivable, less allowance for doubtful accounts of $4,238 and $5,001	86,172	76,683
Unrealized derivative gain	136,488	123,255
Assets of discontinued operations	2,626	876,304
Inventory and other	13,600	21,352
Total current assets	290,770	1,100,442
Unrealized derivative gain	47,121	0
Equity method investments	136,244	155,105
Natural gas and oil properties, successful efforts method	6,420,030	5,390,391
Accumulated depletion and depreciation	(1,573,195)	(1,306,378)
Natural gas and oil properties, successful efforts method, net	4,846,835	4,084,013
Transportation and field assets	121,979	134,980
Accumulated depreciation and amortization	(67,715)	(60,931)
Transportation and field assets, net	54,264	74,049
Other assets	101,244	84,977
Total assets	5,476,478	5,498,586
Current liabilities:
Accounts payable	299,097	289,109
Asset retirement obligations	4,020	4,020
Accrued liabilities	59,348	60,082
Deferred tax liability	9,593	11,848
Accrued interest	33,805	32,189
Unrealized derivative loss	0	352
Liabilities of discontinued operations	1,064	32,962
Total current liabilities	406,927	430,562
Bank debt	0	274,000
Subordinated notes	1,787,678	1,686,536
Deferred tax liability	714,677	672,041
Unrealized derivative loss	0	13,412
Deferred compensation liability	165,810	134,488
Asset retirement obligations and other liabilities	77,633	59,885
Liabilities of discontinued operations	0	3,901
Commitments and contingencies
Stockholders' Equity
Preferred stock, $1 par, 10,000,000 shares authorized, none issued and outstanding
Common stock, $0.01 par, 475,000,000 shares authorized, 161,133,525 issued at September 30, 2011 and 160,113,608 issued at December 31, 2010	1,611	1,601
Common stock held in treasury, 174,715 shares at September 30, 2011 and 204,556 shares at December 31, 2010	(6,456)	(7,512)
Additional paid-in capital	1,858,980	1,820,503
Retained earnings	383,409	341,699
Accumulated other comprehensive income	86,209	67,470
Total stockholders' equity	2,323,753	2,223,761
Total liabilities and stockholders' equity	$ 5,476,478	$ 5,498,586