Derivative Instruments - Additional Information (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) Customer Entity	Dec. 31, 2019 USD ($)
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative Asset	$ 104,242	$ 6,881
Commodity contracts
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative Asset	$ 4,300
Number Of Derivative Counterparty | Entity	8
Commodity contracts | Crude Oil
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative, Underlying Basis	WTI
Commodity contracts | MEH [Member]
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative, Underlying Basis	MEH
Interest Rate Swap
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Number Of Derivative Counterparty | Customer	4
Derivative, Notional Amount	$ 300,000
Derivative, Average Fixed Interest Rate	136.00%