Quarterly report pursuant to Section 13 or 15(d)

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

v3.10.0.1
Supplemental Guarantor Information - Condensed Consolidating Statement of Operations (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Condensed Income Statements Captions [Line Items]        
Revenues $ 149,612 $ 123,323 $ 283,825 $ 247,716
Operating costs and expenses:        
Lease operating expenses 35,582 31,519 72,425 71,683
Production taxes 439 449 894 964
Depreciation, depletion, amortization and accretion 39,757 40,364 77,838 80,354
General and administrative expenses 14,220 16,474 29,258 29,748
Derivative (gain) loss 6,219 (3,689) 6,219 (7,644)
Total costs and expenses 101,145 90,435 196,619 186,632
Operating income 48,467 32,888 87,206 61,084
Interest expense 12,147 11,436 23,470 22,730
Gain on exchange of debt   8,056   7,811
Other (income) expense, net 125 5,168 (208) 5,114
Income before income tax expense (benefit) 36,195 24,340 63,944 41,051
Income tax expense (benefit) 112 (8,975) 221 (16,563)
Net income 36,083 33,315 63,723 57,614
Parent Company        
Condensed Income Statements Captions [Line Items]        
Revenues 77,270 57,417 141,056 111,124
Operating costs and expenses:        
Lease operating expenses 21,617 17,325 41,377 41,027
Production taxes 439 449 894 964
Depreciation, depletion, amortization and accretion 19,954 21,433 39,374 40,587
General and administrative expenses 6,854 7,662 14,057 13,438
Derivative (gain) loss 6,219 (3,689) 6,219 (7,644)
Total costs and expenses 57,917 45,758 107,458 93,516
Operating income 19,353 11,659 33,598 17,608
Earnings of affiliates 24,502 18,941 46,669 36,468
Interest expense 12,147 11,436 23,470 22,730
Gain on exchange of debt   8,056   7,811
Other (income) expense, net (121) 5,168 (457) 5,114
Income before income tax expense (benefit) 31,829 22,052 57,254 34,043
Income tax expense (benefit) (7,337) (12,051) (12,413) (25,090)
Net income 39,166 34,103 69,667 59,133
Guarantor Subsidiaries        
Condensed Income Statements Captions [Line Items]        
Revenues 71,873 65,906 142,300 136,592
Operating costs and expenses:        
Lease operating expenses 13,929 14,194 31,012 30,656
Depreciation, depletion, amortization and accretion 16,743 18,143 32,557 38,248
General and administrative expenses 7,166 8,812 14,990 16,310
Total costs and expenses 39,922 43,889 82,997 91,597
Operating income 31,951 22,017 59,303 44,995
Income before income tax expense (benefit) 31,951 22,017 59,303 44,995
Income tax expense (benefit) 7,449 3,076 12,634 8,527
Net income 24,502 18,941 46,669 36,468
Non-Guarantor Adjustments        
Condensed Income Statements Captions [Line Items]        
Revenues 469   469  
Operating costs and expenses:        
Lease operating expenses 36   36  
Depreciation, depletion, amortization and accretion 164   164  
General and administrative expenses 200   211  
Total costs and expenses 410   421  
Operating income 59   48  
Other (income) expense, net 246   249  
Income before income tax expense (benefit) (187)   (201)  
Net income (187)   (201)  
Gathering and transportation        
Operating costs and expenses:        
Operating costs and expenses 4,928 5,318 9,985 11,527
Gathering and transportation | Parent Company        
Operating costs and expenses:        
Operating costs and expenses 2,834 2,578 5,537 5,144
Gathering and transportation | Guarantor Subsidiaries        
Operating costs and expenses:        
Operating costs and expenses 2,084 2,740 4,438 6,383
Gathering and transportation | Non-Guarantor Adjustments        
Operating costs and expenses:        
Operating costs and expenses 10   10  
Eliminations        
Operating costs and expenses:        
Depreciation, depletion, amortization and accretion 2,896 788 5,743 1,519
Total costs and expenses 2,896 788 5,743 1,519
Operating income (2,896) (788) (5,743) (1,519)
Earnings of affiliates (24,502) (18,941) (46,669) (36,468)
Income before income tax expense (benefit) (27,398) (19,729) (52,412) (37,987)
Net income $ (27,398) $ (19,729) $ (52,412) $ (37,987)