Consolidated Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 288,839	$ 2,848
Accounts receivable, less allowance for doubtful accounts of $3,842 and $5,001	66,772	76,683
Unrealized derivative gain	53,674	123,255
Assets of discontinued operations	16,351	876,304
Inventory and other	11,912	21,352
Deferred tax asset	6,340	0
Total current assets	443,888	1,100,442
Unrealized derivative gain	11,843	0
Equity method investments	139,935	155,105
Natural gas and oil properties, successful efforts method	5,999,665	5,390,391
Accumulated depletion and depreciation	(1,447,300)	(1,306,378)
Natural gas and oil properties, successful efforts method, net	4,552,365	4,084,013
Transportation and field assets	121,905	134,980
Accumulated depreciation and amortization	(64,459)	(60,931)
Transportation and field assets, net	57,446	74,049
Other assets	104,430	84,977
Total assets	5,309,907	5,498,586
Current liabilities:
Accounts payable	246,549	289,109
Asset retirement obligations	4,020	4,020
Accrued liabilities	53,077	60,082
Deferred tax liability	0	11,848
Accrued interest	29,013	32,189
Unrealized derivative loss	0	352
Current liabilities of discontinued operations	19,381	32,962
Total current liabilities	352,040	430,562
Bank debt	0	274,000
Subordinated notes	1,787,398	1,686,536
Deferred tax liability	685,200	672,041
Unrealized derivative loss	4,427	13,412
Deferred compensation liability	159,024	134,488
Asset retirement obligations and other liabilities	76,891	59,885
Long-term 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	0	0
Common stock, $0.01 par, 475,000,000 shares authorized, 160,998,360 issued at June 30, 2011 and 160,113,608 issued at December 31, 2010	1,610	1,601
Common stock held in treasury, 175,653 shares at June 30, 2011 and 204,556 shares at December 31, 2010	(6,489)	(7,512)
Additional paid-in capital	1,848,767	1,820,503
Retained earnings	355,099	341,699
Accumulated other comprehensive income	45,940	67,470
Total stockholders' equity	2,244,927	2,223,761
Total liabilities and stockholders' equity	$ 5,309,907	$ 5,498,586