Quarterly report pursuant to Section 13 or 15(d)

Supplemental Guarantor Information - Condensed Consolidating Statement of Cash Flows (Details)

v3.4.0.3
Supplemental Guarantor Information - Condensed Consolidating Statement of Cash Flows (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Operating activities:      
Net income (loss) $ (190,509) $ (255,095)  
Adjustments to reconcile net loss to net cash provided by operating activities:      
Depreciation, depletion, amortization and accretion 63,733 125,467  
Ceiling test write-down of oil and natural gas properties 116,559 260,390 $ 987,200
Debt issuance costs write-off/amortization of debt items 1,684 156  
Share-based compensation 2,536 2,816  
Derivative gain (2,493)    
Cash receipts on derivative settlements 4,105    
Deferred income taxes (4,882) (103,574)  
Changes in operating assets and liabilities:      
Oil and natural gas receivables 8,165 21,121  
Joint interest and other receivables 4,979 14,533  
Income taxes (310) (325)  
Prepaid expenses and other assets 1,317 17,246  
Asset retirement obligation settlements (3,180) (19,554)  
Accounts payable, accrued liabilities and other 28,005 (10,263)  
Net cash provided by operating activities 29,709 52,918  
Investing activities:      
Investment in oil and natural gas properties and equipment (12,903) (82,765)  
Changes in operating assets and liabilities associated with investing activities (20,680) (52,176)  
Proceeds from sales of assets 1,000    
Purchases of furniture, fixtures and other   (226)  
Net cash used in investing activities (32,583) (135,167)  
Financing activities:      
Borrowings of long-term debt - revolving bank credit facility 340,000 82,000  
Repayments of long-term debt - revolving bank credit facility (52,000) (15,000)  
Other 83 (50)  
Net cash provided by financing activities 288,083 66,950  
Increase (decrease) in cash and cash equivalents 285,209 (15,299)  
Cash and cash equivalents, beginning of period 85,414 23,666 23,666
Cash and cash equivalents, end of period 370,623 8,367 85,414
Parent Company      
Operating activities:      
Net income (loss) (119,385) (255,095)  
Adjustments to reconcile net loss to net cash provided by operating activities:      
Depreciation, depletion, amortization and accretion 20,623 75,152  
Ceiling test write-down of oil and natural gas properties   190,695  
Debt issuance costs write-off/amortization of debt items 1,684 156  
Share-based compensation 2,536 2,816  
Derivative gain (2,493)    
Cash receipts on derivative settlements 4,105    
Deferred income taxes (3,676) (83,649)  
Earnings (loss) of affiliates 73,029 65,627  
Changes in operating assets and liabilities:      
Oil and natural gas receivables 3,606 14,636  
Joint interest and other receivables 4,979 14,533  
Income taxes (310) 15,287  
Prepaid expenses and other assets 3,072 (21,690)  
Asset retirement obligation settlements (584) (19,122)  
Accounts payable, accrued liabilities and other 14,773 (40,260)  
Net cash provided by operating activities 1,959 (40,914)  
Investing activities:      
Investment in oil and natural gas properties and equipment (3,147) (18,750)  
Changes in operating assets and liabilities associated with investing activities (2,686) (22,562)  
Proceeds from sales of assets 1,000    
Investment in subsidiary   203  
Purchases of furniture, fixtures and other   (226)  
Net cash used in investing activities (4,833) (41,335)  
Financing activities:      
Borrowings of long-term debt - revolving bank credit facility 340,000 82,000  
Repayments of long-term debt - revolving bank credit facility (52,000) (15,000)  
Other 83 (50)  
Net cash provided by financing activities 288,083 66,950  
Increase (decrease) in cash and cash equivalents 285,209 (15,299)  
Cash and cash equivalents, beginning of period 85,414 23,666 23,666
Cash and cash equivalents, end of period 370,623 8,367 $ 85,414
Guarantor Subsidiaries      
Operating activities:      
Net income (loss) (73,029) (65,627)  
Adjustments to reconcile net loss to net cash provided by operating activities:      
Depreciation, depletion, amortization and accretion 38,161 50,315  
Ceiling test write-down of oil and natural gas properties 50,384 69,695  
Deferred income taxes (1,206) (19,925)  
Changes in operating assets and liabilities:      
Oil and natural gas receivables 4,559 6,485  
Income taxes   (15,612)  
Prepaid expenses and other assets (7,492) 68,599  
Asset retirement obligation settlements (2,596) (432)  
Accounts payable, accrued liabilities and other 18,969 334  
Net cash provided by operating activities 27,750 93,832  
Investing activities:      
Investment in oil and natural gas properties and equipment (9,756) (64,015)  
Changes in operating assets and liabilities associated with investing activities (17,994) (29,614)  
Net cash used in investing activities (27,750) (93,629)  
Financing activities:      
Investment from parent   (203)  
Net cash provided by financing activities   (203)  
Eliminations      
Operating activities:      
Net income (loss) 1,905 65,627  
Adjustments to reconcile net loss to net cash provided by operating activities:      
Depreciation, depletion, amortization and accretion 4,949    
Ceiling test write-down of oil and natural gas properties 66,175    
Earnings (loss) of affiliates (73,029) (65,627)  
Changes in operating assets and liabilities:      
Prepaid expenses and other assets 5,737 (29,663)  
Accounts payable, accrued liabilities and other $ (5,737) 29,663  
Investing activities:      
Investment in subsidiary   (203)  
Net cash used in investing activities   (203)  
Financing activities:      
Investment from parent   203  
Net cash provided by financing activities   $ 203