Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED BALANCE SHEETS

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CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Current assets:    
Cash and cash equivalents $ 6,993 $ 4,512
Receivables:    
Oil and natural gas sales 68,230 98,550
Joint interest and other 21,105 25,804
Income tax receivable 14,284  
Total receivables 103,619 124,354
Deferred income taxes - current portion   2,007
Restricted cash and cash equivalents 24,026  
Deposit for acquisition 22,800  
Prepaid expenses and other assets 32,455 30,315
Total current assets 189,893 161,188
Property and equipment - at cost:    
Oil and natural gas properties and equipment (full cost method, of which $158,585 at September 30, 2012 and $154,516 at December 31, 2011 were excluded from amortization) 6,229,626 5,959,016
Furniture, fixtures and other 20,912 19,500
Total property and equipment 6,250,538 5,978,516
Less accumulated depreciation, depletion and amortization 4,556,548 4,320,410
Net property and equipment 1,693,990 1,658,106
Restricted deposits for asset retirement obligations 28,441 33,462
Other assets 14,328 16,169
Total assets 1,926,652 1,868,925
Current liabilities:    
Accounts payable 104,274 75,871
Undistributed oil and natural gas proceeds 34,660 33,732
Asset retirement obligations 83,545 138,185
Accrued liabilities 32,331 29,705
Income taxes payable 350 10,392
Deferred income taxes - current portion 2,945  
Total current liabilities 258,105 287,885
Long-term debt 719,000 717,000
Asset retirement obligations, less current portion 250,704 255,695
Deferred income taxes 98,393 58,881
Other liabilities 9,470 4,890
Commitments and contingencies      
Shareholders' equity:    
Preferred stock, $0.00001 par value; 20,000,000 shares authorized; 0 issued at September 30, 2012 and December 31, 2011      
Common stock, $0.00001 par value; 118,330,000 shares authorized; 77,242,660 issued and 74,373,487 outstanding at September 30, 2012; and 77,220,706 issued and 74,351,533 outstanding at December 31, 2011 1 1
Additional paid-in capital 396,601 386,920
Retained earnings 218,545 181,820
Treasury stock, at cost (24,167) (24,167)
Total shareholders' equity 590,980 544,574
Total liabilities and shareholders' equity $ 1,926,652 $ 1,868,925