Annual report pursuant to Section 13 and 15(d)

Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail)

v3.20.4
Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Assets:    
Commodity derivative assets – current $ 78,793 $ 4,131
Derivative assets 25,449 2,750
Liabilities:    
Derivative liabilities, current 85,427 23,450
Derivative liabilities, noncurrent (28,434) (3,385)
Fair Value, Measurements, Recurring | Commodity contracts    
Assets:    
Commodity derivative assets – current 78,793 4,131
Derivative assets 25,449 2,750
Liabilities:    
Derivative liabilities, current (81,772) (23,450)
Derivative liabilities, noncurrent (26,789) (3,385)
Fair Value, Measurements, Recurring | Commodity contracts | Level 1    
Assets:    
Commodity derivative assets – current 0 0
Derivative assets 0 0
Liabilities:    
Derivative liabilities, current 0 0
Derivative liabilities, noncurrent 0 0
Fair Value, Measurements, Recurring | Commodity contracts | Level 2    
Assets:    
Commodity derivative assets – current 78,793 4,131
Derivative assets 25,449 2,750
Liabilities:    
Derivative liabilities, current (81,772) (23,450)
Derivative liabilities, noncurrent (26,789) (3,385)
Fair Value, Measurements, Recurring | Commodity contracts | Level 3    
Assets:    
Commodity derivative assets – current 0 0
Derivative assets 0 0
Liabilities:    
Derivative liabilities, current 0 0
Derivative liabilities, noncurrent 0 $ 0
Fair Value, Measurements, Recurring | Interest Rate Swap    
Liabilities:    
Derivative liabilities, current (3,655)  
Derivative liabilities, noncurrent (1,645)  
Fair Value, Measurements, Recurring | Interest Rate Swap | Level 1    
Liabilities:    
Derivative liabilities, current 0  
Derivative liabilities, noncurrent 0  
Fair Value, Measurements, Recurring | Interest Rate Swap | Level 2    
Liabilities:    
Derivative liabilities, current (3,655)  
Derivative liabilities, noncurrent (1,645)  
Fair Value, Measurements, Recurring | Interest Rate Swap | Level 3    
Liabilities:    
Derivative liabilities, current 0  
Derivative liabilities, noncurrent $ 0  
Crude Oil | Commodity contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative, Underlying Basis WTI  
MEH [Domain] | Commodity contracts    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative, Underlying Basis MEH