Annual report pursuant to Section 13 and 15(d)

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

v3.3.1.900
Supplemental Guarantor Information - Condensed Consolidating Statement of Operations (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Condensed Income Statements Captions [Line Items]                      
Revenues $ 104,064,000 $ 126,228,000 $ 149,066,000 $ 127,907,000 $ 196,677,000 $ 234,521,000 $ 262,994,000 $ 254,516,000 $ 507,265,000 $ 948,708,000 $ 984,088,000
Operating costs and expenses:                      
Lease operating expenses                 192,765,000 264,751,000 270,839,000
Production taxes                 3,002,000 7,932,000 7,135,000
Gathering and transportation                 17,157,000 19,821,000 17,510,000
Depreciation, depletion and amortization                 373,368,000 490,469,000 430,611,000
Asset retirement obligations accretion                 20,703,000 20,633,000 20,918,000
Ceiling test write-down of oil and natural gas properties 32,400,000 441,600,000 252,800,000 260,400,000         987,238,000 0 0
General and administrative expenses                 73,110,000 86,999,000 81,874,000
Derivative (gain) loss                 (14,375,000) (3,965,000) 8,470,000
Total costs and expenses                 1,652,968,000 886,640,000 837,357,000
Operating income (loss) (60,816,000) [1] (468,573,000) [1] (278,806,000) [1] (337,508,000) [1] (30,543,000) 20,983,000 34,403,000 37,225,000 (1,145,703,000) 62,068,000 146,731,000
Interest expense:                      
Incurred                 104,592,000 86,922,000 85,639,000
Capitalized                 (7,256,000) (8,526,000) (10,058,000)
Other (income) expense, net                 4,663,000 (208,000) (8,946,000)
Income (loss) before income tax expense (benefit)                 (1,247,702,000) (16,120,000) 80,096,000
Income tax expense (benefit)                 (202,984,000) (4,459,000) 28,774,000
Net income (loss) $ (51,606,000) [1] $ (477,568,000) [1] $ (260,449,000) [1] $ (255,095,000) [1] $ (33,371,000) $ 684,000 $ 9,837,000 $ 11,189,000 (1,044,718,000) (11,661,000) 51,322,000
Parent Company                      
Condensed Income Statements Captions [Line Items]                      
Revenues                 290,212,000 571,365,000 631,267,000
Operating costs and expenses:                      
Lease operating expenses                 126,189,000 180,149,000 202,096,000
Production taxes                 3,002,000 7,932,000 7,135,000
Gathering and transportation                 9,209,000 11,790,000 9,248,000
Depreciation, depletion and amortization                 201,154,000 267,406,000 236,600,000
Asset retirement obligations accretion                 11,587,000 10,981,000 14,218,000
Ceiling test write-down of oil and natural gas properties                 616,947,000    
General and administrative expenses                 39,009,000 46,513,000 44,040,000
Derivative (gain) loss                 (14,375,000) (3,965,000) 8,470,000
Total costs and expenses                 992,722,000 520,806,000 521,807,000
Operating income (loss)                 (702,510,000) 50,559,000 109,460,000
Earnings (loss) of affiliates                 (464,931,000) 8,320,000 24,400,000
Interest expense:                      
Incurred                 101,542,000 84,460,000 82,570,000
Capitalized                 (4,206,000) (6,064,000) (6,989,000)
Other (income) expense, net                 4,663,000 (208,000) (8,946,000)
Income (loss) before income tax expense (benefit)                 (1,269,440,000) (19,309,000) 67,225,000
Income tax expense (benefit)                 (77,133,000) (7,648,000) 15,903,000
Net income (loss)                 (1,192,307,000) (11,661,000) 51,322,000
Guarantor Subsidiaries                      
Condensed Income Statements Captions [Line Items]                      
Revenues                 217,053,000 377,343,000 352,821,000
Operating costs and expenses:                      
Lease operating expenses                 66,576,000 84,602,000 68,743,000
Gathering and transportation                 7,948,000 8,031,000 8,262,000
Depreciation, depletion and amortization                 172,214,000 223,063,000 194,011,000
Asset retirement obligations accretion                 9,116,000 9,652,000 6,700,000
Ceiling test write-down of oil and natural gas properties                 517,880,000    
General and administrative expenses                 34,101,000 40,486,000 37,834,000
Total costs and expenses                 807,835,000 365,834,000 315,550,000
Operating income (loss)                 (590,782,000) 11,509,000 37,271,000
Interest expense:                      
Incurred                 3,050,000 2,462,000 3,069,000
Capitalized                 (3,050,000) (2,462,000) (3,069,000)
Income (loss) before income tax expense (benefit)                 (590,782,000) 11,509,000 37,271,000
Income tax expense (benefit)                 (125,851,000) 3,189,000 12,871,000
Net income (loss)                 (464,931,000) 8,320,000 24,400,000
Eliminations                      
Operating costs and expenses:                      
Ceiling test write-down of oil and natural gas properties                 (147,589,000)    
Total costs and expenses                 (147,589,000)    
Operating income (loss)                 147,589,000    
Earnings (loss) of affiliates                 464,931,000 (8,320,000) (24,400,000)
Interest expense:                      
Income (loss) before income tax expense (benefit)                 612,520,000 (8,320,000) (24,400,000)
Net income (loss)                 $ 612,520,000 $ (8,320,000) $ (24,400,000)
[1] 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.