Annual report pursuant to Section 13 and 15(d)

Supplemental Guarantor Information - Condensed Consolidating Statement of Operations (Details)

v3.6.0.2
Supplemental Guarantor Information - Condensed Consolidating Statement of Operations (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
Condensed Income Statements Captions [Line Items]                      
Revenues $ 115,213,000 $ 107,403,000 $ 99,655,000 $ 77,715,000 $ 104,064,000 $ 126,228,000 $ 149,066,000 $ 127,907,000 $ 399,986,000 $ 507,265,000 $ 948,708,000
Operating costs and expenses:                      
Lease operating expenses                 152,399,000 192,765,000 264,751,000
Production taxes                 1,889,000 3,002,000 7,932,000
Gathering and transportation                 22,928,000 17,157,000 19,821,000
Depreciation, depletion and amortization                 194,038,000 373,368,000 490,469,000
Asset retirement obligations accretion                 17,571,000 20,703,000 20,633,000
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
General and administrative expenses                 59,740,000 73,110,000 86,999,000
Derivative (gain) loss                 2,926,000 (14,375,000) (3,965,000)
Total costs and expenses                 730,554,000 1,652,968,000 886,640,000
Operating income (loss) 21,319,000 [1] (58,276,000) [1] (126,997,000) [1] (166,614,000) [1] (60,816,000) [1] (468,573,000) [1] (278,806,000) [1] (337,508,000) [1] (330,568,000) (1,145,703,000) 62,068,000
Interest expense:                      
Incurred                 92,791,000 104,592,000 86,922,000
Capitalized                 (520,000) (7,256,000) (8,526,000)
Gain on exchange of debt   123,900,000             123,923,000    
Other (income) expense, net                 (6,520,000) 4,663,000 (208,000)
Loss before income tax benefit                 (292,396,000) (1,247,702,000) (16,120,000)
Income tax expense (benefit)                 (43,376,000) (202,984,000) (4,459,000)
Net 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)
Parent Company                      
Condensed Income Statements Captions [Line Items]                      
Revenues                 161,063,000 290,212,000 571,365,000
Operating costs and expenses:                      
Lease operating expenses                 84,415,000 126,189,000 180,149,000
Production taxes                 1,889,000 3,002,000 7,932,000
Gathering and transportation                 9,795,000 9,209,000 11,790,000
Depreciation, depletion and amortization                 73,268,000 201,154,000 267,406,000
Asset retirement obligations accretion                 8,165,000 11,587,000 10,981,000
Ceiling test write-down of oil and natural gas properties                 28,305,000 616,947,000  
General and administrative expenses                 24,817,000 39,009,000 46,513,000
Derivative (gain) loss                 2,926,000 (14,375,000) (3,965,000)
Total costs and expenses                 233,580,000 992,722,000 520,806,000
Operating income (loss)                 (72,517,000) (702,510,000) 50,559,000
Earnings (loss) of affiliates                 (109,853,000) (464,931,000) 8,320,000
Interest expense:                      
Incurred                 92,607,000 101,542,000 84,460,000
Capitalized                 (336,000) (4,206,000) (6,064,000)
Gain on exchange of debt                 123,923,000    
Other (income) expense, net                 (6,520,000) 4,663,000 (208,000)
Loss before income tax benefit                 (144,198,000) (1,269,440,000) (19,309,000)
Income tax expense (benefit)                 (43,720,000) (77,133,000) (7,648,000)
Net loss                 (100,478,000) (1,192,307,000) (11,661,000)
Guarantor Subsidiaries                      
Condensed Income Statements Captions [Line Items]                      
Revenues                 238,923,000 217,053,000 377,343,000
Operating costs and expenses:                      
Lease operating expenses                 67,984,000 66,576,000 84,602,000
Gathering and transportation                 13,133,000 7,948,000 8,031,000
Depreciation, depletion and amortization                 112,277,000 172,214,000 223,063,000
Asset retirement obligations accretion                 9,406,000 9,116,000 9,652,000
Ceiling test write-down of oil and natural gas properties                 110,709,000 517,880,000  
General and administrative expenses                 34,923,000 34,101,000 40,486,000
Total costs and expenses                 348,432,000 807,835,000 365,834,000
Operating income (loss)                 (109,509,000) (590,782,000) 11,509,000
Interest expense:                      
Incurred                 184,000 3,050,000 2,462,000
Capitalized                 (184,000) (3,050,000) (2,462,000)
Loss before income tax benefit                 (109,509,000) (590,782,000) 11,509,000
Income tax expense (benefit)                 344,000 (125,851,000) 3,189,000
Net loss                 (109,853,000) (464,931,000) 8,320,000
Eliminations                      
Operating costs and expenses:                      
Depreciation, depletion and amortization                 8,493,000    
Ceiling test write-down of oil and natural gas properties                 140,049,000 (147,589,000)  
Total costs and expenses                 148,542,000 (147,589,000)  
Operating income (loss)                 (148,542,000) 147,589,000  
Earnings (loss) of affiliates                 109,853,000 464,931,000 (8,320,000)
Interest expense:                      
Loss before income tax benefit                 (38,689,000) 612,520,000 (8,320,000)
Net loss                 $ (38,689,000) $ 612,520,000 $ (8,320,000)
[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.