v3.3.1.900
Summary of Significant Accounting Policies - Additional Information (Detail)
12 Months Ended
Dec. 31, 2015
USD ($)
Wells
Segment
Dec. 31, 2014
USD ($)
Wells
Dec. 31, 2013
USD ($)
Summary Of Significant Accounting Policies [Line Items]      
Number of exploratory wells capitalized | Wells 0 0  
Capitalized interest cost $ 0    
Depreciation depletion and amortization for oil & gas 108,800,000 $ 106,200,000 $ 76,500,000
Impairment of oil and gas properties and equipment 220,197,000 0 0
Depreciation expense for other property and equipment 563,000 588,000 502,000
Equity method investments $ 0    
Tax benefit 50.00%    
Uncertain tax positions $ 0 0  
Number of days in which payment is to be made 30 days    
Realized gains on commodity derivatives $ 4,800,000 4,800,000  
Exploration expenses $ 4,439,000 3,831,000 $ 2,238,000
Number of operating segment | Segment 1    
Deferred tax assets current $ 0 14,200,000  
Deferred tax liabilities current $ 0 $ 14,242,000  
Customer Concentration Risk [Member] | Wildcat Permian Services, LLC [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Sales to customers     30.00%
Customer Concentration Risk [Member] | DCP Midstream, LLC [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Sales to customers 36.00% 30.00% 27.00%
Customer Concentration Risk [Member] | JP Energy Permian, LLC [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Sales to customers 63.00% 69.00% 23.00%
Minimum [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Estimated useful lives of furniture, fixtures and equipment 3 years    
Maximum [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Estimated useful lives of furniture, fixtures and equipment 15 years    
Oil and Gas [Member] | Minimum [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Number of days in which payment is to be made 30 days    
Oil and Gas [Member] | Maximum [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Number of days in which payment is to be made 60 days    
Drilling Contracts [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Exploration expenses $ 2,200,000    
Proved Property Impairment [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Impairment of oil and gas properties and equipment 214,700,000    
Unproved Property Impairment [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Impairment of oil and gas properties and equipment $ 5,500,000