Commodity Derivative Financial Instruments - Summary of Fair Values and Classifications of Derivative Instruments (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Derivative [Line Items]
Derivative Assets, Gross Fair Value	$ 342
Derivative Assets, Effect of Netting	(342)
Derivative Liabilities, Gross Fair Value	1,286
Derivative Liabilities, Effect of Netting	(342)
Derivative Liabilities, Net Carrying Value	944
Other Current Assets [Member]
Derivative [Line Items]
Derivative Assets, Gross Fair Value	342
Derivative Assets, Effect of Netting	(342)
Other Current Liabilities [Member]
Derivative [Line Items]
Derivative Liabilities, Gross Fair Value	1,286
Derivative Liabilities, Effect of Netting	(342)
Derivative Liabilities, Net Carrying Value	$ 944

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