Annual report pursuant to Section 13 and 15(d)

Condensed Consolidating Balance Sheet (Detail)

v2.4.0.6
Condensed Consolidating Balance Sheet (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Current assets:        
Cash and cash equivalents $ 12,245 $ 4,512 $ 28,655 $ 38,187
Receivables:        
Oil and natural gas sales 97,733 98,550    
Joint interest and other 56,439 25,804    
Insurance    715    
Income taxes 47,884      
Total receivables 202,056 124,354    
Deferred income taxes 267 2,007    
Prepaid expenses and other assets 25,555 30,315    
Total current assets 240,123 161,188    
Property and equipment - at cost:        
Oil and natural gas properties and equipment 6,694,510 5,959,016    
Furniture, fixtures and other 21,786 19,500    
Total property and equipment 6,716,296 5,978,516    
Less accumulated depreciation, depletion and amortization 4,655,841 4,320,410    
Net property and equipment 2,060,455 1,658,106    
Restricted deposits for asset retirement obligations 28,466 33,462    
Other assets 19,943 16,169    
Total assets 2,348,987 1,868,925    
Liabilities and Shareholders' Equity        
Accounts payable 123,885 75,871    
Undistributed oil and natural gas proceeds 37,073 33,732    
Asset retirement obligations 92,630 138,185    
Accrued liabilities 20,755 29,705    
Income taxes 266 10,392    
Total current liabilities 274,609 287,885    
Long-term debt 1,087,611 717,000    
Asset retirement obligations, less current portion 291,423 255,695    
Deferred income taxes 145,249 58,881    
Other liabilities 8,908 4,890    
Commitments and contingencies          
Shareholders' equity:        
Common stock 1 1    
Additional paid-in capital 396,186 386,920    
Retained earnings 169,167 181,820    
Treasury stock, at cost (24,167) (24,167)    
Total shareholders' equity 541,187 544,574    
Total liabilities and shareholders' equity 2,348,987 1,868,925    
Parent Company
        
Current assets:        
Cash and cash equivalents 12,245 4,512 28,655 38,187
Receivables:        
Oil and natural gas sales 80,729 78,131    
Joint interest and other 56,439 25,089    
Insurance   715    
Income taxes 163,750 74,183    
Total receivables 300,918 178,118    
Deferred income taxes 267 2,007    
Prepaid expenses and other assets 25,555 30,315    
Total current assets 338,985 214,952    
Property and equipment - at cost:        
Oil and natural gas properties and equipment 6,356,529 5,689,535    
Furniture, fixtures and other 21,786 19,500    
Total property and equipment 6,378,315 5,709,035    
Less accumulated depreciation, depletion and amortization 4,461,886 4,208,825    
Net property and equipment 1,916,429 1,500,210    
Restricted deposits for asset retirement obligations 28,466 33,462    
Other assets 442,540 372,572    
Total assets 2,726,420 2,121,196    
Liabilities and Shareholders' Equity        
Accounts payable 123,792 73,333    
Undistributed oil and natural gas proceeds 36,791 33,391    
Asset retirement obligations 92,595 138,185    
Accrued liabilities 20,755 29,705    
Total current liabilities 273,933 274,614    
Long-term debt 1,087,611 717,000    
Asset retirement obligations, less current portion 262,524 228,419    
Deferred income taxes 158,758 76,518    
Other liabilities 402,407 280,071    
Commitments and contingencies          
Shareholders' equity:        
Common stock 1 1    
Additional paid-in capital 396,186 386,920    
Retained earnings 169,167 181,820    
Treasury stock, at cost (24,167) (24,167)    
Total shareholders' equity 541,187 544,574    
Total liabilities and shareholders' equity 2,726,420 2,121,196    
Guarantor Subsidiaries
        
Receivables:        
Oil and natural gas sales 17,004 20,419    
Total receivables 17,004 20,419    
Total current assets 17,004 20,419    
Property and equipment - at cost:        
Oil and natural gas properties and equipment 337,981 269,481    
Total property and equipment 337,981 269,481    
Less accumulated depreciation, depletion and amortization 193,955 111,585    
Net property and equipment 144,026 157,896    
Deferred income taxes 13,509 17,637    
Other assets 393,499 275,181    
Total assets 568,038 471,133    
Liabilities and Shareholders' Equity        
Accounts payable 93 2,538    
Undistributed oil and natural gas proceeds 282 341    
Income taxes 116,132 84,575    
Total current liabilities 116,507 87,454    
Asset retirement obligations, less current portion 28,934 27,276    
Commitments and contingencies          
Shareholders' equity:        
Additional paid-in capital 231,759 231,759    
Retained earnings 190,838 124,644    
Total shareholders' equity 422,597 356,403    
Total liabilities and shareholders' equity 568,038 471,133    
Eliminations
        
Receivables:        
Income taxes (115,866) (74,183)    
Total receivables (115,866) (74,183)    
Total current assets (115,866) (74,183)    
Property and equipment - at cost:        
Deferred income taxes (13,509) (17,637)    
Other assets (816,096) (631,584)    
Total assets (945,471) (723,404)    
Liabilities and Shareholders' Equity        
Asset retirement obligations 35      
Income taxes (115,866) (74,183)    
Total current liabilities (115,831) (74,183)    
Asset retirement obligations, less current portion (35)      
Deferred income taxes (13,509) (17,637)    
Other liabilities (393,499) (275,181)    
Commitments and contingencies          
Shareholders' equity:        
Additional paid-in capital (231,759) (231,759)    
Retained earnings (190,838) (124,644)    
Total shareholders' equity (422,597) (356,403)    
Total liabilities and shareholders' equity $ (945,471) $ (723,404)