Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments - Additional Information (Detail)

v3.20.2
Derivative Instruments - Additional Information (Detail)
$ in Thousands
9 Months Ended
Sep. 30, 2020
USD ($)
Customer
Dec. 31, 2019
USD ($)
Derivative Instruments and Hedging Activities Disclosure [Line Items]    
Derivative assets $ 28,403 $ 26,835
Derivative Asset 53,033 $ 6,881
Interest Rate Swap    
Derivative Instruments and Hedging Activities Disclosure [Line Items]    
Derivative assets $ 6,200  
Number of derivative counterparties | Customer 4  
Derivative, Notional Amount $ 300,000  
Derivative, Average Fixed Interest Rate 136.00%  
Commodity contracts    
Derivative Instruments and Hedging Activities Disclosure [Line Items]    
Number of derivative counterparties | Customer 7  
Derivative Asset $ 30,900  
Commodity contracts | Crude Oil    
Derivative Instruments and Hedging Activities Disclosure [Line Items]    
Third-party quoted forward prices NYMEX WTI  
Commodity contracts | MEH [Domain]    
Derivative Instruments and Hedging Activities Disclosure [Line Items]    
Third-party quoted forward prices MEH  
Commodity contracts | Natural Gas [Member]    
Derivative Instruments and Hedging Activities Disclosure [Line Items]    
Third-party quoted forward prices NYMEX HH