Annual report pursuant to Section 13 and 15(d)

Supplemental Guarantor Information - Condensed Consolidating Balance Sheet (Details)

v3.8.0.1
Supplemental Guarantor Information - Condensed Consolidating Balance Sheet (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Mar. 03, 2015
Dec. 31, 2014
Current assets:          
Cash and cash equivalents $ 99,058 $ 70,236 $ 85,414 $ 23,666 $ 23,666
Receivables:          
Oil and natural gas sales 45,443 43,073      
Joint interest 19,754 21,885      
Insurance reimbursement   30,100      
Income taxes 13,006 11,943      
Total receivables 78,203 107,001      
Prepaid expenses and other assets 13,419 14,504      
Total current assets 190,680 191,741      
Oil and natural gas properties and other, net - at cost: 579,016 547,053      
Restricted deposits for asset retirement obligations 25,394 27,371      
Income tax receivables 52,097 52,097      
Other assets 60,393 11,464      
Total assets 907,580 829,726      
Current liabilities:          
Accounts payable 83,665 81,039      
Undistributed oil and natural gas proceeds 20,129 26,254      
Asset retirement obligations 23,613 78,264      
Long-term debt 22,925 8,272      
Accrued liabilities 17,930 9,200      
Total current liabilities 168,262 203,029      
Long-term debt:          
Principal 889,790 873,733      
Carrying value adjustments 79,337 138,722      
Long term debt, less current portion - carrying value 969,127 1,012,455      
Asset retirement obligations, less current portion 276,833 256,174      
Other liabilities 66,866 17,105      
Shareholders’ equity (deficit):          
Common stock 1 1      
Additional paid-in capital 545,820 539,973      
Retained earnings (deficit) (1,095,162) (1,174,844)      
Treasury stock, at cost (24,167) (24,167)      
Total shareholders’ equity (deficit) (573,508) (659,037) (526,491)   $ 509,308
Total liabilities and shareholders’ equity (deficit) 907,580 829,726      
Parent Company          
Current assets:          
Cash and cash equivalents 99,058 70,236 $ 85,414 $ 23,666  
Receivables:          
Oil and natural gas sales 5,665 2,173      
Joint interest 19,754 21,885      
Insurance reimbursement   30,100      
Income taxes 128,835 111,215      
Total receivables 154,254 165,373      
Prepaid expenses and other assets 11,154 12,448      
Total current assets 264,466 248,057      
Oil and natural gas properties and other, net - at cost: 430,354 360,966      
Restricted deposits for asset retirement obligations 25,394 27,371      
Income tax receivables 52,097 52,097      
Other assets 505,304 394,931      
Total assets 1,277,615 1,083,422      
Current liabilities:          
Accounts payable 76,703 74,306      
Undistributed oil and natural gas proceeds 18,762 24,493      
Asset retirement obligations 22,488 62,261      
Long-term debt 22,925 8,272      
Accrued liabilities 18,058 9,293      
Total current liabilities 158,936 178,625      
Long-term debt:          
Principal 889,790 873,733      
Carrying value adjustments 79,337 138,722      
Long term debt, less current portion - carrying value 969,127 1,012,455      
Asset retirement obligations, less current portion 152,883 142,376      
Other liabilities 566,375 408,050      
Shareholders’ equity (deficit):          
Common stock 1 1      
Additional paid-in capital 545,820 539,973      
Retained earnings (deficit) (1,091,360) (1,173,891)      
Treasury stock, at cost (24,167) (24,167)      
Total shareholders’ equity (deficit) (569,706) (658,084)      
Total liabilities and shareholders’ equity (deficit) 1,277,615 1,083,422      
Guarantor Subsidiaries          
Receivables:          
Oil and natural gas sales 39,778 40,900      
Total receivables 39,778 40,900      
Prepaid expenses and other assets 2,265 2,056      
Total current assets 42,043 42,956      
Oil and natural gas properties and other, net - at cost: 152,464 187,040      
Other assets 453,306 344,742      
Total assets 647,813 574,738      
Current liabilities:          
Accounts payable 6,962 6,733      
Undistributed oil and natural gas proceeds 1,367 1,761      
Asset retirement obligations 1,125 16,003      
Accrued liabilities 115,701 99,179      
Total current liabilities 125,155 123,676      
Long-term debt:          
Asset retirement obligations, less current portion 123,950 113,798      
Shareholders’ equity (deficit):          
Additional paid-in capital 704,885 704,885      
Retained earnings (deficit) (306,177) (367,621)      
Total shareholders’ equity (deficit) 398,708 337,264      
Total liabilities and shareholders’ equity (deficit) 647,813 574,738      
Eliminations          
Receivables:          
Income taxes (115,829) (99,272)      
Total receivables (115,829) (99,272)      
Total current assets (115,829) (99,272)      
Oil and natural gas properties and other, net - at cost: (3,802) (953)      
Other assets (898,217) (728,209)      
Total assets (1,017,848) (828,434)      
Current liabilities:          
Accrued liabilities (115,829) (99,272)      
Total current liabilities (115,829) (99,272)      
Long-term debt:          
Other liabilities (499,509) (390,945)      
Shareholders’ equity (deficit):          
Additional paid-in capital (704,885) (704,885)      
Retained earnings (deficit) 302,375 366,668      
Total shareholders’ equity (deficit) (402,510) (338,217)      
Total liabilities and shareholders’ equity (deficit) $ (1,017,848) $ (828,434)