Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidating Financial Information (Condensed Consolidating Statements of Operations) (Details)

v3.8.0.1
Condensed Consolidating Financial Information (Condensed Consolidating Statements of Operations) (Details) - USD ($)
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Revenues:    
Total revenues $ 325,392,000 $ 333,004,000
Costs and expenses:    
Lease operating expenses 18,906,000 19,303,000
Production taxes 6,854,000 3,906,000
Midstream gathering and processing 64,193,000 47,941,000
Depreciation, depletion and amortization 111,018,000 65,991,000
Impairment of oil and natural gas properties 0 0
General and administrative 13,099,000 12,600,000
Accretion expense 1,004,000 282,000
Acquisition expense 0 1,298,000
Total costs and expenses 215,074,000 151,321,000
INCOME (LOSS) FROM OPERATIONS 110,318,000 181,683,000
OTHER (INCOME) EXPENSE:    
Interest expense 33,965,000 23,479,000
Interest income (37,000) (842,000)
(Income) loss from equity method investments and investments in subsidiaries (13,536,000) 4,907,000
Other (income) expense (95,000) (316,000)
Total other (income) expense 20,297,000 27,228,000
INCOME (LOSS) BEFORE INCOME TAXES 90,021,000 154,455,000
INCOME TAX BENEFIT (69,000) 0
NET INCOME (LOSS) 90,090,000 154,455,000
Reportable Legal Entities | Parent    
Revenues:    
Total revenues 213,561,000 272,441,000
Costs and expenses:    
Lease operating expenses 13,831,000 17,449,000
Production taxes 4,011,000 3,102,000
Midstream gathering and processing 45,666,000 37,724,000
Depreciation, depletion and amortization 111,017,000 65,990,000
General and administrative 13,811,000 12,874,000
Accretion expense 790,000 282,000
Acquisition expense 0 0
Total costs and expenses 189,126,000 137,421,000
INCOME (LOSS) FROM OPERATIONS 24,435,000 135,020,000
OTHER (INCOME) EXPENSE:    
Interest expense 34,393,000 25,048,000
Interest income (31,000) (842,000)
(Income) loss from equity method investments and investments in subsidiaries (99,864,000) (42,614,000)
Other (income) expense (84,000) (1,027,000)
Total other (income) expense (65,586,000) (19,435,000)
INCOME (LOSS) BEFORE INCOME TAXES 90,021,000 154,455,000
INCOME TAX BENEFIT (69,000) 0
NET INCOME (LOSS) 90,090,000 154,455,000
Reportable Legal Entities | Guarantors    
Revenues:    
Total revenues 111,831,000 60,563,000
Costs and expenses:    
Lease operating expenses 5,075,000 1,854,000
Production taxes 2,843,000 804,000
Midstream gathering and processing 18,527,000 10,217,000
Depreciation, depletion and amortization 1,000 1,000
General and administrative (713,000) (275,000)
Accretion expense 214,000 0
Acquisition expense 0 1,298,000
Total costs and expenses 25,947,000 13,899,000
INCOME (LOSS) FROM OPERATIONS 85,884,000 46,664,000
OTHER (INCOME) EXPENSE:    
Interest expense (428,000) (1,569,000)
Interest income (6,000) 0
(Income) loss from equity method investments and investments in subsidiaries (357,000) 2,541,000
Other (income) expense (11,000) (189,000)
Total other (income) expense (802,000) 783,000
INCOME (LOSS) BEFORE INCOME TAXES 86,686,000 45,881,000
INCOME TAX BENEFIT 0 0
NET INCOME (LOSS) 86,686,000 45,881,000
Reportable Legal Entities | Non-Guarantor    
Revenues:    
Total revenues 0 0
Costs and expenses:    
Lease operating expenses 0 0
Production taxes 0 0
Midstream gathering and processing 0 0
Depreciation, depletion and amortization 0 0
General and administrative 1,000 1,000
Accretion expense 0 0
Acquisition expense 0 0
Total costs and expenses 1,000 1,000
INCOME (LOSS) FROM OPERATIONS (1,000) (1,000)
OTHER (INCOME) EXPENSE:    
Interest expense 0 0
Interest income 0 0
(Income) loss from equity method investments and investments in subsidiaries 330,000 365,000
Other (income) expense 0 0
Total other (income) expense 330,000 365,000
INCOME (LOSS) BEFORE INCOME TAXES (331,000) (366,000)
INCOME TAX BENEFIT 0 0
NET INCOME (LOSS) (331,000) (366,000)
Eliminations    
Revenues:    
Total revenues 0 0
Costs and expenses:    
Lease operating expenses 0 0
Production taxes 0 0
Midstream gathering and processing 0 0
Depreciation, depletion and amortization 0 0
General and administrative 0 0
Accretion expense 0 0
Acquisition expense 0 0
Total costs and expenses 0 0
INCOME (LOSS) FROM OPERATIONS 0 0
OTHER (INCOME) EXPENSE:    
Interest expense 0 0
Interest income 0 0
(Income) loss from equity method investments and investments in subsidiaries 86,355,000 44,615,000
Other (income) expense 0 900,000
Total other (income) expense 86,355,000 45,515,000
INCOME (LOSS) BEFORE INCOME TAXES (86,355,000) (45,515,000)
INCOME TAX BENEFIT 0 0
NET INCOME (LOSS) $ (86,355,000) $ (45,515,000)