Derivative Financial Instruments Additional Information (Details) - Natural Gas [Member] MMBTU in Thousands	3 Months Ended
	Mar. 31, 2021 MMBTU
Collars
Derivatives in Place for Anticipated Production
Derivative, Nonmonetary Notional Amount, Energy Measure	72,300
Fixed Price Swaps
Derivatives in Place for Anticipated Production
Derivative, Nonmonetary Notional Amount, Energy Measure	48,750
2021 | Collars
Derivatives in Place for Anticipated Production
Derivative, Nonmonetary Notional Amount, Energy Measure	54,900
2021 | Fixed Price Swaps
Derivatives in Place for Anticipated Production
Derivative, Nonmonetary Notional Amount, Energy Measure	23,850
2021 | Basis Protection - CIG [Member] | Fixed Price Swaps
Derivatives in Place for Anticipated Production
Derivative, Nonmonetary Notional Amount, Energy Measure	78,750
2022 | Collars
Derivatives in Place for Anticipated Production
Derivative, Nonmonetary Notional Amount, Energy Measure	17,400
2022 | Fixed Price Swaps
Derivatives in Place for Anticipated Production
Derivative, Nonmonetary Notional Amount, Energy Measure	14,700
2022 | Basis Protection - CIG [Member] | Fixed Price Swaps
Derivatives in Place for Anticipated Production
Derivative, Nonmonetary Notional Amount, Energy Measure	32,100