Derivative Instruments - Additional Information (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($) Entity	Dec. 31, 2018 USD ($)
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative assets	$ 4,320	$ 991
Commodity contracts
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Derivative assets	$ 18,200
Number of derivative counterparties | Entity	8
Commodity contracts | Crude Oil
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Third-party quoted forward prices	WTI
Commodity contracts | Louisiana Light Sweet [Member]
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Third-party quoted forward prices	LLS
Commodity contracts | MEH [Member]
Derivative Instruments and Hedging Activities Disclosure [Line Items]
Third-party quoted forward prices	MEH