Derivative Instruments - Summary of Outstanding Financial Commodity Derivatives (Details) - Natural gas (NYMEX)	1 Months Ended	12 Months Ended
	Feb. 26, 2021 MMBTU $ / MMBTU	Dec. 31, 2020 MMBTU $ / MMBTU
Derivative [Line Items]
Volume (Mmbtu) | MMBTU		18,250,000
Swaps, Weighted Average Price (in dollars per Mmbtu)		2.74
Volume (Mmbtu) | MMBTU		164,250,000
Collars, Weighted-Average Floor Price (in dollars per Mmbtu)		2.68
Collars, Weighted- Average Ceiling Price (in dollars per Mmbtu)		3.09
Volume (Mmbtu) | MMBTU		10,700,000
Collars, Floor Price (in dollars per Mmbtu)		0
Collars, Weighted-Average Floor Price (in dollars per Mmbtu)		2.50
Collars, Ceiling Price (in dollars per Mmbtu)		0
Collars, Weighted- Average Ceiling Price (in dollars per Mmbtu)		2.80
Volume (Mmbtu) | MMBTU		10,700,000
Swaps, Weighted Average Price (in dollars per Mmbtu)		2.75
Subsequent Event
Derivative [Line Items]
Volume (Mmbtu) | MMBTU	10,700,000
Swaps, Weighted Average Price (in dollars per Mmbtu)	2.81
Minimum
Derivative [Line Items]
Collars, Floor Price (in dollars per Mmbtu)		2.50
Minimum
Derivative [Line Items]
Collars, Ceiling Price (in dollars per Mmbtu)		2.83
Maximum
Derivative [Line Items]
Collars, Floor Price (in dollars per Mmbtu)		2.85
Maximum
Derivative [Line Items]
Collars, Ceiling Price (in dollars per Mmbtu)		3.94