Financial Instruments and Hedging Activities - Crude Oil Derivative Contracts (Details) barrels_per_day in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021 barrels_per_day $ / bbl	Dec. 31, 2021 barrels_per_day $ / bbl
Commodity derivative contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Delivery Commitments and Contracts, Daily Production | barrels_per_day	45
Average forward price (in dollars per barrel)	42.77
Commodity derivative contracts | Forecast
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Delivery Commitments and Contracts, Daily Production | barrels_per_day		20
Average forward price (in dollars per barrel)		44.88
Commodity collars
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Delivery Commitments and Contracts, Daily Production | barrels_per_day	0
Commodity collars | Minimum
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Average forward price (in dollars per barrel)	0
Commodity collars | Maximum
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Average forward price (in dollars per barrel)	0
Commodity collars | Forecast
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Oil and Gas Delivery Commitments and Contracts, Daily Production | barrels_per_day		16
Commodity collars | Forecast | Minimum
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Average forward price (in dollars per barrel)		60.38
Commodity collars | Forecast | Maximum
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Average forward price (in dollars per barrel)		71.83