Annual report pursuant to Section 13 and 15(d)

Supplemental Guarantor Information - Condensed Consolidating Balance Sheet (Details)

v3.6.0.2
Supplemental Guarantor Information - Condensed Consolidating Balance Sheet (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Current assets:        
Cash and cash equivalents $ 70,236 $ 85,414 $ 23,666 $ 15,800
Receivables:        
Oil and natural gas sales 43,073 35,005    
Joint interest and other 63,928 22,012    
Total receivables 107,001 57,017    
Prepaid expenses and other assets 14,504 26,879    
Total current assets 191,741 169,310    
Property and equipment - at cost:        
Oil and natural gas properties and equipment (full cost method, of which $0 at December 31, 2016 and $18,595 at December 31, 2015 were excluded from amortization) 7,932,504 7,902,494    
Furniture, fixtures and other 20,898 20,802    
Total property and equipment 7,953,402 7,923,296    
Less accumulated depreciation, depletion and amortization 7,406,349 6,933,247    
Net property and equipment 547,053 990,049    
Deferred income taxes   27,595    
Restricted deposits for asset retirement obligations 27,371 15,606    
Income tax receivables 52,097      
Other assets 11,464 5,462    
Total assets 829,726 1,208,022    
Current liabilities:        
Accounts payable 81,039 109,797    
Undistributed oil and natural gas proceeds 26,254 21,439    
Asset retirement obligations 78,264 84,335    
Long-term debt 8,272      
Accrued liabilities 9,200 11,922    
Total current liabilities 203,029 227,493    
Long-term debt, less current maturities 1,012,455 1,196,855    
Asset retirement obligations, less current portion 256,174 293,987    
Other liabilities 17,105 16,178    
Shareholders’ equity (deficit):        
Common stock, $0.00001 par value; 200,000,000 shares authorized; 140,543,545 issued and 137,674,372 outstanding at December 31, 2016; 79,375,662 issued and 76,506,489 outstanding at December 31, 2015 1 1    
Additional paid-in capital 539,973 423,499    
Retained earnings (deficit) (1,174,844) (925,824)    
Treasury stock, at cost; 2,869,173 shares at December 31, 2016 and 2015 (24,167) (24,167)    
Total shareholders’ equity (deficit) (659,037) (526,491) 509,308 540,610
Total liabilities and shareholders’ equity (deficit) 829,726 1,208,022    
Parent Company        
Current assets:        
Cash and cash equivalents 70,236 85,414 $ 23,666 $ 15,800
Receivables:        
Oil and natural gas sales 2,173 2,742    
Joint interest and other 163,200 121,190    
Total receivables 165,373 123,932    
Prepaid expenses and other assets 12,448 25,375    
Total current assets 248,057 234,721    
Property and equipment - at cost:        
Oil and natural gas properties and equipment (full cost method, of which $0 at December 31, 2016 and $18,595 at December 31, 2015 were excluded from amortization) 5,700,205 5,682,793    
Furniture, fixtures and other 20,898 20,802    
Total property and equipment 5,721,103 5,703,595    
Less accumulated depreciation, depletion and amortization 5,360,137 5,258,563    
Net property and equipment 360,966 445,032    
Deferred income taxes   27,251    
Restricted deposits for asset retirement obligations 27,371 15,606    
Income tax receivables 52,097      
Other assets 394,931 498,782    
Total assets 1,083,422 1,221,392    
Current liabilities:        
Accounts payable 74,306 100,282    
Undistributed oil and natural gas proceeds 24,493 20,463    
Asset retirement obligations 62,261 63,716    
Long-term debt 8,272      
Accrued liabilities 9,293 11,922    
Total current liabilities 178,625 196,383    
Long-term debt, less current maturities 1,012,455 1,196,855    
Asset retirement obligations, less current portion 142,376 173,105    
Other liabilities 408,050 329,129    
Shareholders’ equity (deficit):        
Common stock, $0.00001 par value; 200,000,000 shares authorized; 140,543,545 issued and 137,674,372 outstanding at December 31, 2016; 79,375,662 issued and 76,506,489 outstanding at December 31, 2015 1 1    
Additional paid-in capital 539,973 423,499    
Retained earnings (deficit) (1,173,891) (1,073,413)    
Treasury stock, at cost; 2,869,173 shares at December 31, 2016 and 2015 (24,167) (24,167)    
Total shareholders’ equity (deficit) (658,084) (674,080)    
Total liabilities and shareholders’ equity (deficit) 1,083,422 1,221,392    
Guarantor Subsidiaries        
Receivables:        
Oil and natural gas sales 40,900 32,263    
Total receivables 40,900 32,263    
Prepaid expenses and other assets 2,056 1,504    
Total current assets 42,956 33,767    
Property and equipment - at cost:        
Oil and natural gas properties and equipment (full cost method, of which $0 at December 31, 2016 and $18,595 at December 31, 2015 were excluded from amortization) 2,232,299 2,219,701    
Total property and equipment 2,232,299 2,219,701    
Less accumulated depreciation, depletion and amortization 2,045,259 1,822,273    
Net property and equipment 187,040 397,428    
Deferred income taxes   344    
Other assets 344,742 266,748    
Total assets 574,738 698,287    
Current liabilities:        
Accounts payable 6,733 9,515    
Undistributed oil and natural gas proceeds 1,761 976    
Asset retirement obligations 16,003 20,619    
Accrued liabilities 99,179 99,178    
Total current liabilities 123,676 130,288    
Asset retirement obligations, less current portion 113,798 120,882    
Shareholders’ equity (deficit):        
Additional paid-in capital 704,885 704,885    
Retained earnings (deficit) (367,621) (257,768)    
Total shareholders’ equity (deficit) 337,264 447,117    
Total liabilities and shareholders’ equity (deficit) 574,738 698,287    
Eliminations        
Receivables:        
Joint interest and other (99,272) (99,178)    
Total receivables (99,272) (99,178)    
Total current assets (99,272) (99,178)    
Property and equipment - at cost:        
Less accumulated depreciation, depletion and amortization 953 (147,589)    
Net property and equipment (953) 147,589    
Other assets (728,209) (760,068)    
Total assets (828,434) (711,657)    
Current liabilities:        
Accrued liabilities (99,272) (99,178)    
Total current liabilities (99,272) (99,178)    
Other liabilities (390,945) (312,951)    
Shareholders’ equity (deficit):        
Additional paid-in capital (704,885) (704,885)    
Retained earnings (deficit) 366,668 405,357    
Total shareholders’ equity (deficit) (338,217) (299,528)    
Total liabilities and shareholders’ equity (deficit) $ (828,434) $ (711,657)