Annual report pursuant to Section 13 and 15(d)

Derivative Instruments - Additional Information (Detail)

v3.19.3.a.u2
Derivative Instruments - Additional Information (Detail)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
bbl
Entity
$ / bbl
Feb. 21, 2020
USD ($)
$ / bbl
Jan. 31, 2020
bbl
Dec. 31, 2018
USD ($)
Derivative Instruments and Hedging Activities Disclosure [Line Items]        
Derivative Asset | $ $ 6,881     $ 45,032
Commodity contracts        
Derivative Instruments and Hedging Activities Disclosure [Line Items]        
Derivative Asset | $ $ 20,000      
Number Of Derivative Counterparty | Entity 9      
Commodity contracts | Crude Oil        
Derivative Instruments and Hedging Activities Disclosure [Line Items]        
Derivative, Underlying Basis WTI      
Commodity contracts | Louisiana Light Sweet [Member]        
Derivative Instruments and Hedging Activities Disclosure [Line Items]        
Derivative, Underlying Basis LLS      
Commodity contracts | MEH [Member]        
Derivative Instruments and Hedging Activities Disclosure [Line Items]        
Derivative, Underlying Basis MEH      
Subsequent Event [Member] | Costless collar [Domain] | Natural Gas [Member]        
Derivative Instruments and Hedging Activities Disclosure [Line Items]        
Derivative, Nonmonetary Notional Amount   270,000    
Derivative, Floor Price   2.00    
Derivative, Cap Price   2.18    
Subsequent Event [Member] | Interest Rate Contract [Member]        
Derivative Instruments and Hedging Activities Disclosure [Line Items]        
Derivative, Notional Amount | $   $ 300,000    
Derivative, Average Fixed Interest Rate   136.00%    
First Quarter 2020 [Member] | Swap [Member] | Crude Oil        
Derivative Instruments and Hedging Activities Disclosure [Line Items]        
Derivative, Nonmonetary Notional Amount | bbl 15,648      
Derivative, Floor Price 48.00      
Derivative, Cap Price 57.10      
First Quarter 2020 [Member] | Swap [Member] | MEH [Member]        
Derivative Instruments and Hedging Activities Disclosure [Line Items]        
Derivative, Nonmonetary Notional Amount | bbl 2,000      
First Quarter 2020 [Member] | Subsequent Event [Member] | Swap [Member] | Crude Oil        
Derivative Instruments and Hedging Activities Disclosure [Line Items]        
Derivative, Nonmonetary Notional Amount | bbl     2,000