Quarterly report pursuant to Section 13 or 15(d)

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

v3.8.0.1
Supplemental Guarantor Information - Condensed Consolidating Statement of Operations (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Condensed Income Statements Captions [Line Items]    
Revenues $ 134,213 $ 124,393
Operating costs and expenses:    
Lease operating expenses 36,843 40,164
Production taxes 455 515
Gathering and transportation 5,057 6,209
Depreciation, depletion, amortization and accretion 38,081 39,990
General and administrative expenses 15,038 13,274
Derivative gain   (3,955)
Total costs and expenses 95,474 96,197
Operating income 38,739 28,196
Interest expense incurred 11,323 11,294
Other (income) expense, net (333) 191
Income before income tax expense (benefit) 27,749 16,711
Income tax expense (benefit) 109 (7,588)
Net income 27,640 24,299
Parent Company    
Condensed Income Statements Captions [Line Items]    
Revenues 63,786 53,707
Operating costs and expenses:    
Lease operating expenses 19,760 23,702
Production taxes 455 515
Gathering and transportation 2,703 2,566
Depreciation, depletion, amortization and accretion 19,420 19,154
General and administrative expenses 7,203 5,776
Derivative gain   (3,955)
Total costs and expenses 49,541 47,758
Operating income 14,245 5,949
Earnings of affiliates 22,167 17,527
Interest expense incurred 11,323 11,294
Other (income) expense, net (336) 191
Income before income tax expense (benefit) 25,425 11,991
Income tax expense (benefit) (5,076) (13,039)
Net income 30,501 25,030
Guarantor Subsidiaries    
Condensed Income Statements Captions [Line Items]    
Revenues 70,427 70,686
Operating costs and expenses:    
Lease operating expenses 17,083 16,462
Gathering and transportation 2,354 3,643
Depreciation, depletion, amortization and accretion 15,814 20,105
General and administrative expenses 7,824 7,498
Total costs and expenses 43,075 47,708
Operating income 27,352 22,978
Income before income tax expense (benefit) 27,352 22,978
Income tax expense (benefit) 5,185 5,451
Net income 22,167 17,527
Non-Guarantor Adjustments    
Operating costs and expenses:    
General and administrative expenses 11  
Total costs and expenses 11  
Operating income (11)  
Other (income) expense, net 3  
Income before income tax expense (benefit) (14)  
Net income (14)  
Eliminations    
Operating costs and expenses:    
Depreciation, depletion, amortization and accretion 2,847 731
Total costs and expenses 2,847 731
Operating income (2,847) (731)
Earnings of affiliates (22,167) (17,527)
Income before income tax expense (benefit) (25,014) (18,258)
Net income $ (25,014) $ (18,258)