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CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)
In Thousands
Sep. 30, 2011
Dec. 31, 2010
Current assets:  
Cash and cash equivalents$ 270,089$ 217,569
Accounts receivable72,639102,325
Derivative instruments66,72660,182
Inventory13,42222,640
Other current assets31,34628,825
Current assets of discontinued operations050,142
Total current assets454,222481,683
Oil and gas properties, full cost method of accounting:  
Proved, net of accumulated depletion of $6,838,561 and $6,688,0121,768,3051,370,864
Unproved687,900646,264
Net oil and gas properties2,456,2052,017,128
Other property and equipment, net of accumulated depreciation and amortization of $47,300 and $42,43251,18253,145
Net property and equipment2,507,3872,070,273
Deferred income taxes236,558284,021
Goodwill239,420239,420
Derivative instruments20,7728,244
Other assets39,74636,698
Long-term assets of discontinued operations0665,049
TOTAL ASSETS3,498,1053,785,388
Current liabilities:  
Accounts payable and accrued liabilities224,259209,998
Accrued interest34,04123,630
Derivative instruments13,10136,413
Deferred income taxes16,9416,911
Current portion of long-term debt285,497[1]287,092[1]
Asset retirement obligations2,501121
Other current liabilities17,89119,562
Current liabilities of discontinued operations045,647
Total current liabilities594,231629,374
Long-term debt1,586,5911,582,280
Asset retirement obligations75,76073,011
Derivative instruments1,8490
Other liabilities64,98373,463
Long-term liabilities of discontinued operations074,473
Total liabilities2,323,4142,432,601
Shareholders' equity:  
Preferred stock, none issued and outstanding00
Common stock, 114,400,776 and 113,594,788 shares issued and outstanding11,44011,359
Capital surplus2,480,9842,684,269
Accumulated deficit(1,306,530)(1,424,905)
Accumulated other comprehensive income(11,203)82,064
Total shareholders' equity1,174,6911,352,787
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY$ 3,498,105$ 3,785,388
[1]Due December 2011.