v3.5.0.2
Derivative Instruments and Fair Value Measurements - Additional Information (Detail)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Nov. 04, 2016
MMBTU
$ / MMBTU
Sep. 30, 2016
USD ($)
Sep. 30, 2015
USD ($)
Sep. 30, 2016
USD ($)
MMBTU
Sep. 30, 2015
USD ($)
Derivative Instruments And Hedging Activities Disclosures [Line Items]          
Impairment of oil and gas properties and equipment | $     $ 220,197   $ 220,197
Proved oil and gas property fair value | $     22,000   22,000
Proved Property Impairment [Member]          
Derivative Instruments And Hedging Activities Disclosures [Line Items]          
Impairment of oil and gas properties and equipment | $   $ 0 214,700 $ 0 214,700
Unproved Property Impairment [Member]          
Derivative Instruments And Hedging Activities Disclosures [Line Items]          
Impairment of oil and gas properties and equipment | $     $ 5,500   $ 5,500
Collars [Member] | Natural Gas January 2017 through December 2017 Contract [Member] | Subsequent Event [Member]          
Derivative Instruments And Hedging Activities Disclosures [Line Items]          
Volume Transacted | MMBTU 100,000        
Floor Price | $ / MMBTU 3.00        
Ceiling Price | $ / MMBTU 3.65        
Collars [Member] | Natural Gas April 2017 - December 2017 Contract [Member]          
Derivative Instruments And Hedging Activities Disclosures [Line Items]          
Volume Transacted | MMBTU       200,000  
Collars [Member] | Natural Gas April 2017 - December 2017 Contract [Member] | Subsequent Event [Member]          
Derivative Instruments And Hedging Activities Disclosures [Line Items]          
Volume Transacted | MMBTU 400,000        
Floor Price | $ / MMBTU 3.00        
Ceiling Price | $ / MMBTU 3.47