Derivatives - Narrative (Details) bbl in Thousands	9 Months Ended
	Sep. 30, 2021 $ / bbl bbl	Dec. 31, 2020
Credit Derivatives [Line Items]
Derivative contracts, barrels | bbl	1,150
Average fixed interest rate		3.91%
Option Collars | December 2021
Credit Derivatives [Line Items]
Derivative contracts, barrels | bbl	25
Option Collars | December 2022
Credit Derivatives [Line Items]
Derivative contracts, barrels | bbl	35
Option Collar - Floor | December 2021
Credit Derivatives [Line Items]
Derivative, average price risk option strike price	36.50
Option Collar - Floor | December 2022
Credit Derivatives [Line Items]
Derivative, average price risk option strike price	56.29
Option Collar - Ceiling | December 2021
Credit Derivatives [Line Items]
Derivative, average price risk option strike price	60.00
Option Collar - Ceiling | December 2022
Credit Derivatives [Line Items]
Derivative, average price risk option strike price	72.86