Annual report pursuant to Section 13 and 15(d)

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

v3.6.0.2
Supplemental Guarantor Information - Condensed Consolidating Statement of Cash Flows (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Operating activities:                      
Net income (loss) $ 16,483,000 [1] $ 45,928,000 [1] $ (120,922,000) [1] $ (190,509,000) [1] $ (51,606,000) [1] $ (477,568,000) [1] $ (260,449,000) [1] $ (255,095,000) [1] $ (249,020,000) $ (1,044,718,000) $ (11,661,000)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:                      
Depreciation, depletion, amortization and accretion                 211,609,000 394,071,000 511,102,000
Ceiling test write-down of oil and natural gas properties 0 57,900,000 $ 104,600,000 116,600,000 32,400,000 $ 441,600,000 $ 252,800,000 260,400,000 279,063,000 987,238,000 0
Gain on exchange of debt   $ (123,900,000)             (123,923,000)    
Debt issuance costs write-off/amortization of debt items                 2,548,000 4,411,000 701,000
Share-based compensation                 11,013,000 10,242,000 14,744,000
Derivative (gain) loss                 2,926,000 (14,375,000) (3,965,000)
Cash receipts (payments) on derivative settlements, net                 4,746,000 6,703,000 (5,318,000)
Deferred income taxes                 28,392,000 (203,272,000) (4,760,000)
Changes in operating assets and liabilities:                      
Oil and natural gas receivables                 (7,005,000) 32,236,000 29,510,000
Joint interest and other receivables                 (1,126,000) 21,633,000 (4,255,000)
Income taxes                 (64,274,000) (7,000) 3,143,000
Prepaid expenses and other assets                 (14,946,000) 17,816,000 15,012,000
Asset retirement obligation settlements                 (72,320,000) (32,555,000) (74,313,000)
Accounts payable, accrued liabilities and other                 6,497,000 (46,195,000) 4,881,000
Debt issuance costs write-down/amortization of debt items                 2,548,000 4,411,000 701,000
Net cash provided by (used in) operating activities                 14,180,000 133,228,000 474,821,000
Investing activities:                      
Acquisition of property interest in oil and natural gas properties                     (72,234,000)
Investment in oil and natural gas properties and equipment                 (48,606,000) (230,161,000) (554,378,000)
Changes in operating assets and liabilities associated with investing activities                 (35,194,000) (55,425,000) 37,450,000
Net proceeds from sales of assets                 1,500,000 372,939,000  
Purchases of furniture, fixtures and other                 (96,000) (1,278,000) (3,340,000)
Net cash provided by (used in) investing activities                 (82,396,000) 86,075,000 (592,502,000)
Financing activities:                      
Borrowings of long-term debt - revolving bank credit facility                 340,000,000 263,000,000 556,000,000
Repayments of long-term debt - revolving bank credit facility                 (340,000,000) (710,000,000) (399,000,000)
Debt exchange/issuance costs                 (18,464,000) (6,669,000)  
Dividends to shareholders                     (30,260,000)
Other                 (928,000) (886,000) (1,193,000)
Net cash provided by (used in) financing activities                 53,038,000 (157,555,000) 125,547,000
Increase (decrease) in cash and cash equivalents                 (15,178,000) 61,748,000 7,866,000
Cash and cash equivalents, beginning of period       85,414,000       23,666,000 85,414,000 23,666,000 15,800,000
Cash and cash equivalents, end of period 70,236,000       85,414,000       70,236,000 85,414,000 23,666,000
Parent Company                      
Operating activities:                      
Net income (loss)                 (100,478,000) (1,192,307,000) (11,661,000)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:                      
Depreciation, depletion, amortization and accretion                 81,433,000 212,741,000 278,387,000
Ceiling test write-down of oil and natural gas properties                 28,305,000 616,947,000  
Gain on exchange of debt                 (123,923,000)    
Debt issuance costs write-off/amortization of debt items                 2,548,000 4,411,000 701,000
Share-based compensation                 11,013,000 10,242,000 14,744,000
Derivative (gain) loss                 2,926,000 (14,375,000) (3,965,000)
Cash receipts (payments) on derivative settlements, net                 4,746,000 6,703,000 (5,318,000)
Deferred income taxes                 28,048,000 (77,421,000) (32,456,000)
Earnings (loss) of affiliates                 109,853,000 464,931,000 (8,320,000)
Changes in operating assets and liabilities:                      
Oil and natural gas receivables                 1,630,000 39,078,000 19,553,000
Joint interest and other receivables                 (1,126,000) 21,633,000 (4,255,000)
Income taxes                 (64,274,000) (7,000) 27,650,000
Prepaid expenses and other assets                 (14,395,000) (13,916,000) 45,962,000
Asset retirement obligation settlements                 (49,303,000) (26,637,000) (57,253,000)
Accounts payable, accrued liabilities and other                 46,955,000 (141,596,000) 11,931,000
Debt issuance costs write-down/amortization of debt items                 2,548,000 4,411,000 701,000
Net cash provided by (used in) operating activities                 (36,042,000) (89,573,000) 275,700,000
Investing activities:                      
Acquisition of property interest in oil and natural gas properties                     (17,407,000)
Investment in oil and natural gas properties and equipment                 (37,418,000) (31,534,000) (312,044,000)
Changes in operating assets and liabilities associated with investing activities                 4,340,000 (29,806,000) 1,733,000
Net proceeds from sales of assets                 1,000,000 372,939,000  
Investment in subsidiary                   (1,445,000) (62,323,000)
Purchases of furniture, fixtures and other                 (96,000) (1,278,000) (3,340,000)
Net cash provided by (used in) investing activities                 (32,174,000) 308,876,000 (393,381,000)
Financing activities:                      
Borrowings of long-term debt - revolving bank credit facility                 340,000,000 263,000,000 556,000,000
Repayments of long-term debt - revolving bank credit facility                 (340,000,000) (710,000,000) (399,000,000)
Debt exchange/issuance costs                 (18,464,000) (6,669,000)  
Dividends to shareholders                     (30,260,000)
Other                 (928,000) (886,000) (1,193,000)
Net cash provided by (used in) financing activities                 53,038,000 (157,555,000) 125,547,000
Increase (decrease) in cash and cash equivalents                 (15,178,000) 61,748,000 7,866,000
Cash and cash equivalents, beginning of period       $ 85,414,000       $ 23,666,000 85,414,000 23,666,000 15,800,000
Cash and cash equivalents, end of period $ 70,236,000       $ 85,414,000       70,236,000 85,414,000 23,666,000
Guarantor Subsidiaries                      
Operating activities:                      
Net income (loss)                 (109,853,000) (464,931,000) 8,320,000
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:                      
Depreciation, depletion, amortization and accretion                 121,683,000 181,330,000 232,715,000
Ceiling test write-down of oil and natural gas properties                 110,709,000 517,880,000  
Deferred income taxes                 344,000 (125,851,000) 27,696,000
Changes in operating assets and liabilities:                      
Oil and natural gas receivables                 (8,635,000) (6,842,000) 9,957,000
Income taxes                     (24,507,000)
Prepaid expenses and other assets                 (78,547,000) 122,977,000 (7,525,000)
Asset retirement obligation settlements                 (23,017,000) (5,918,000) (17,060,000)
Accounts payable, accrued liabilities and other                 37,538,000 4,156,000 (30,475,000)
Net cash provided by (used in) operating activities                 50,222,000 222,801,000 199,121,000
Investing activities:                      
Acquisition of property interest in oil and natural gas properties                     (54,827,000)
Investment in oil and natural gas properties and equipment                 (11,188,000) (198,627,000) (242,334,000)
Changes in operating assets and liabilities associated with investing activities                 (39,534,000) (25,619,000) 35,717,000
Net proceeds from sales of assets                 500,000    
Net cash provided by (used in) investing activities                 (50,222,000) (224,246,000) (261,444,000)
Financing activities:                      
Investment from parent                   1,445,000 62,323,000
Net cash provided by (used in) financing activities                   1,445,000 62,323,000
11.00% 1.5 Lien Term Loan, Due November 2019                      
Financing activities:                      
Issuance of Term Loan                 75,000,000    
Payment of interest on Term Loan                 2,570,000    
11.00% 1.5 Lien Term Loan, Due November 2019 | Parent Company                      
Financing activities:                      
Issuance of Term Loan                 75,000,000    
Payment of interest on Term Loan                 2,570,000    
9.00 % Second Lien Term Loan, Due May 2020                      
Financing activities:                      
Issuance of Term Loan                   297,000,000  
9.00 % Second Lien Term Loan, Due May 2020 | Parent Company                      
Financing activities:                      
Issuance of Term Loan                   297,000,000  
Eliminations                      
Operating activities:                      
Net income (loss)                 (38,689,000) 612,520,000 (8,320,000)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:                      
Depreciation, depletion, amortization and accretion                 8,493,000    
Ceiling test write-down of oil and natural gas properties                 140,049,000 (147,589,000)  
Earnings (loss) of affiliates                 (109,853,000) (464,931,000) 8,320,000
Changes in operating assets and liabilities:                      
Prepaid expenses and other assets                 77,996,000 (91,245,000) (23,425,000)
Accounts payable, accrued liabilities and other                 $ (77,996,000) 91,245,000 23,425,000
Investing activities:                      
Investment in subsidiary                   1,445,000 62,323,000
Net cash provided by (used in) investing activities                   1,445,000 62,323,000
Financing activities:                      
Investment from parent                   (1,445,000) (62,323,000)
Net cash provided by (used in) financing activities                   $ (1,445,000) $ (62,323,000)
[1] During 2016, we recorded in first, second and third quarter ceiling test write-downs of oil and natural gas properties of $116.6 million, $104.6 million and $57.9 million, respectively. In the third quarter of 2016, we recorded a gain on exchange of debt of $123.9 million. During 2015, we recorded in first, second, third and fourth quarter ceiling test write-downs of oil and natural gas properties of $260.4 million, $252.8 million, $441.6 million and $32.4 million, respectively. See Note 1 for additional information.