Quarterly report pursuant to Section 13 or 15(d)

Supplemental Guarantor Information - Condensed Consolidating Balance Sheet (Details)

v2.4.0.8
Supplemental Guarantor Information - Condensed Consolidating Balance Sheet (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Jun. 30, 2013
Dec. 31, 2012
Current assets:        
Cash and cash equivalents $ 23,847 $ 15,800 $ 9,276 $ 12,245
Receivables:        
Oil and natural gas sales 94,417 96,752    
Joint interest and other 26,584 27,984    
Income tax 120 3,120    
Total receivables 121,121 127,856    
Prepaid expenses and other assets 38,644 29,946    
Total current assets 183,612 173,602    
Property and equipment - at cost:        
Oil and natural gas properties and equipment 7,628,208 7,339,097    
Furniture, fixtures and other 21,660 21,431    
Total property and equipment 7,649,868 7,360,528    
Less accumulated depreciation, depletion and amortization 5,326,074 5,084,704    
Net property and equipment 2,323,794 2,275,824    
Restricted deposits for asset retirement obligations 23,723 37,421    
Other assets 18,643 20,455    
Total assets 2,549,772 2,507,302    
Current liabilities:        
Accounts payable 140,495 145,212    
Undistributed oil and natural gas proceeds 39,202 42,107    
Asset retirement obligations 69,923 77,785    
Accrued liabilities 31,299 28,000    
Total current liabilities 280,919 293,104    
Long-term debt, less current maturities 1,224,262 1,205,421    
Asset retirement obligations, less current portion 287,680 276,637    
Deferred income taxes 189,902 178,142    
Other liabilities 13,622 13,388    
Shareholders' equity:        
Common stock 1 1    
Additional paid-in capital 410,642 403,564    
Retained earnings 166,911 161,212    
Treasury stock, at cost (24,167) (24,167)    
Total shareholders’ equity 553,387 540,610    
Total liabilities and shareholders’ equity 2,549,772 2,507,302    
Eliminations
        
Receivables:        
Income tax (144,856) (92,491)    
Total receivables (144,856) (92,491)    
Total current assets (144,856) (92,491)    
Property and equipment - at cost:        
Other assets (1,709,000) (1,410,568)    
Total assets (1,853,856) (1,503,059)    
Current liabilities:        
Accrued liabilities (144,856) (92,491)    
Total current liabilities (144,856) (92,491)    
Other liabilities (646,966) (427,621)    
Shareholders' equity:        
Additional paid-in capital (842,801) (784,104)    
Retained earnings (219,233) (198,843)    
Total shareholders’ equity (1,062,034) (982,947)    
Total liabilities and shareholders’ equity (1,853,856) (1,503,059)    
Parent Company
        
Current assets:        
Cash and cash equivalents 23,847 15,800 9,276 12,245
Receivables:        
Oil and natural gas sales 53,737 61,373    
Joint interest and other 26,584 27,984    
Income tax 144,976 95,611    
Total receivables 225,297 184,968    
Prepaid expenses and other assets 34,462 23,674    
Total current assets 283,606 224,442    
Property and equipment - at cost:        
Oil and natural gas properties and equipment 5,817,544 5,667,389    
Furniture, fixtures and other 21,660 21,431    
Total property and equipment 5,839,204 5,688,820    
Less accumulated depreciation, depletion and amortization 4,295,168 4,166,359    
Net property and equipment 1,544,036 1,522,461    
Restricted deposits for asset retirement obligations 23,723 37,421    
Other assets 1,160,693 951,203    
Total assets 3,012,058 2,735,527    
Current liabilities:        
Accounts payable 134,748 144,492    
Undistributed oil and natural gas proceeds 38,591 41,735    
Asset retirement obligations 61,509 65,329    
Accrued liabilities 59,800 28,000    
Total current liabilities 294,648 279,556    
Long-term debt, less current maturities 1,224,262 1,205,421    
Asset retirement obligations, less current portion 172,999 189,507    
Deferred income taxes 106,175 79,424    
Other liabilities 660,588 441,009    
Shareholders' equity:        
Common stock 1 1    
Additional paid-in capital 410,641 403,564    
Retained earnings 166,911 161,212    
Treasury stock, at cost (24,167) (24,167)    
Total shareholders’ equity 553,386 540,610    
Total liabilities and shareholders’ equity 3,012,058 2,735,527    
Guarantor Subsidiaries
        
Receivables:        
Oil and natural gas sales 40,680 35,379    
Total receivables 40,680 35,379    
Prepaid expenses and other assets 4,182 6,272    
Total current assets 44,862 41,651    
Property and equipment - at cost:        
Oil and natural gas properties and equipment 1,810,664 1,671,708    
Total property and equipment 1,810,664 1,671,708    
Less accumulated depreciation, depletion and amortization 1,030,906 918,345    
Net property and equipment 779,758 753,363    
Other assets 566,950 479,820    
Total assets 1,391,570 1,274,834    
Current liabilities:        
Accounts payable 5,747 720    
Undistributed oil and natural gas proceeds 611 372    
Asset retirement obligations 8,414 12,456    
Accrued liabilities 116,355 92,491    
Total current liabilities 131,127 106,039    
Asset retirement obligations, less current portion 114,681 87,130    
Deferred income taxes 83,727 98,718    
Shareholders' equity:        
Additional paid-in capital 842,802 784,104    
Retained earnings 219,233 198,843    
Total shareholders’ equity 1,062,035 982,947    
Total liabilities and shareholders’ equity $ 1,391,570 $ 1,274,834