Quarterly report pursuant to Section 13 or 15(d)

Supplemental Guarantor Information - Condensed Consolidating Balance Sheet (Details)

v3.5.0.2
Supplemental Guarantor Information - Condensed Consolidating Balance Sheet (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Jun. 30, 2015
Dec. 31, 2014
Current assets:        
Cash and cash equivalents $ 171,824 $ 85,414 $ 5,671 $ 23,666
Receivables:        
Oil and natural gas sales 34,841 35,005    
Joint interest and other 20,145 22,012    
Income taxes 5,599      
Total receivables 60,585 57,017    
Prepaid expenses and other assets 18,258 26,879    
Total current assets 250,667 169,310    
Property and equipment - at cost:        
Oil and natural gas properties and equipment 7,901,252 7,902,494    
Furniture, fixtures and other 20,873 20,802    
Total property and equipment 7,922,125 7,923,296    
Less accumulated depreciation, depletion and amortization 7,266,289 6,933,247    
Net property and equipment 655,836 990,049    
Deferred income taxes 8,463 27,595    
Restricted deposits for asset retirement obligations 26,409 15,606    
Income tax receivables 52,097      
Other assets 4,882 5,462    
Total assets 998,354 1,208,022    
Current liabilities:        
Accounts payable 92,852 109,797    
Undistributed oil and natural gas proceeds 20,659 21,439    
Asset retirement obligations 91,296 84,335    
Accrued liabilities 12,011 11,922    
Total current liabilities 216,818 227,493    
Long-term debt 1,345,051 1,196,855    
Asset retirement obligations, less current portion 252,826 293,987    
Other liabilities 16,462 16,178    
Shareholders’ deficit:        
Common stock 1 1    
Additional paid-in capital 428,618 423,499    
Retained earnings (deficit) (1,237,255) (925,824)    
Treasury stock, at cost (24,167) (24,167)    
Total shareholders’ deficit (832,803) (526,491)    
Total liabilities and shareholders’ deficit 998,354 1,208,022    
Parent Company        
Current assets:        
Cash and cash equivalents 171,824 85,414 $ 5,671 $ 23,666
Receivables:        
Oil and natural gas sales 2,626 2,742    
Joint interest and other 20,145 121,190    
Income taxes 104,801      
Total receivables 127,572 123,932    
Prepaid expenses and other assets 15,797 25,375    
Total current assets 315,193 234,721    
Property and equipment - at cost:        
Oil and natural gas properties and equipment 5,672,644 5,682,793    
Furniture, fixtures and other 20,873 20,802    
Total property and equipment 5,693,517 5,703,595    
Less accumulated depreciation, depletion and amortization 5,297,078 5,258,563    
Net property and equipment 396,439 445,032    
Deferred income taxes 6,305 27,251    
Restricted deposits for asset retirement obligations 26,409 15,606    
Income tax receivables 52,097      
Other assets 384,408 498,782    
Total assets 1,180,851 1,221,392    
Current liabilities:        
Accounts payable 85,708 100,282    
Undistributed oil and natural gas proceeds 18,751 20,463    
Asset retirement obligations 72,906 63,716    
Accrued liabilities 12,035 11,922    
Total current liabilities 189,400 196,383    
Long-term debt 1,345,051 1,196,855    
Asset retirement obligations, less current portion 137,295 173,105    
Other liabilities 345,879 329,129    
Shareholders’ deficit:        
Common stock 1 1    
Additional paid-in capital 428,618 423,499    
Retained earnings (deficit) (1,241,226) (1,073,413)    
Treasury stock, at cost (24,167) (24,167)    
Total shareholders’ deficit (836,774) (674,080)    
Total liabilities and shareholders’ deficit 1,180,851 1,221,392    
Guarantor Subsidiaries        
Receivables:        
Oil and natural gas sales 32,215 32,263    
Total receivables 32,215 32,263    
Prepaid expenses and other assets 2,461 1,504    
Total current assets 34,676 33,767    
Property and equipment - at cost:        
Oil and natural gas properties and equipment 2,228,608 2,219,701    
Total property and equipment 2,228,608 2,219,701    
Less accumulated depreciation, depletion and amortization 1,973,181 1,822,273    
Net property and equipment 255,427 397,428    
Deferred income taxes 2,158 344    
Other assets 283,212 266,748    
Total assets 575,473 698,287    
Current liabilities:        
Accounts payable 7,144 9,515    
Undistributed oil and natural gas proceeds 1,908 976    
Asset retirement obligations 18,390 20,619    
Accrued liabilities 99,178 99,178    
Total current liabilities 126,620 130,288    
Asset retirement obligations, less current portion 115,531 120,882    
Shareholders’ deficit:        
Additional paid-in capital 704,885 704,885    
Retained earnings (deficit) (371,563) (257,768)    
Total shareholders’ deficit 333,322 447,117    
Total liabilities and shareholders’ deficit 575,473 698,287    
Eliminations        
Receivables:        
Joint interest and other   (99,178)    
Income taxes (99,202)      
Total receivables (99,202) (99,178)    
Total current assets (99,202) (99,178)    
Property and equipment - at cost:        
Less accumulated depreciation, depletion and amortization (3,970) (147,589)    
Net property and equipment 3,970 147,589    
Other assets (662,738) (760,068)    
Total assets (757,970) (711,657)    
Current liabilities:        
Accrued liabilities (99,202) (99,178)    
Total current liabilities (99,202) (99,178)    
Other liabilities (329,417) (312,951)    
Shareholders’ deficit:        
Additional paid-in capital (704,885) (704,885)    
Retained earnings (deficit) 375,534 405,357    
Total shareholders’ deficit (329,351) (299,528)    
Total liabilities and shareholders’ deficit $ (757,970) $ (711,657)