Derivatives and Risk Management - Schedule of Energy Commodity Derivative Volumes (Details) MWh in Thousands, MMBTU in Thousands	12 Months Ended
	Dec. 31, 2021 MWh MMBTU	Dec. 31, 2020 MMBTU MWh
Purchase [Member] | Physical [Member] | Electric Derivative [Member]
Energy Commodity Derivative Volumes [Line Items]
Year one | MWh	129	1
Year two | MWh	0	0
Year three | MWh	0	0
Year four | MWh	0	0
Year five | MWh		0
Purchase [Member] | Physical [Member] | Gas Derivative [Member]
Energy Commodity Derivative Volumes [Line Items]
Year one | MMBTU	7,114	10,353
Year two | MMBTU	378	450
Year three | MMBTU	228	0
Year four | MMBTU	0	0
Year five | MMBTU		0
Purchase [Member] | Financial [Member] | Electric Derivative [Member]
Energy Commodity Derivative Volumes [Line Items]
Year one | MWh	0	224
Year two | MWh	0	0
Year three | MWh	0	0
Year four | MWh	0	0
Year five | MWh		0
Purchase [Member] | Financial [Member] | Gas Derivative [Member]
Energy Commodity Derivative Volumes [Line Items]
Year one | MMBTU	61,405	65,188
Year two | MMBTU	23,218	25,525
Year three | MMBTU	3,413	4,950
Year four | MMBTU	0	0
Year five | MMBTU		0
Sales [Member] | Physical [Member] | Electric Derivative [Member]
Energy Commodity Derivative Volumes [Line Items]
Year one | MWh	234	17
Year two | MWh	0	0
Year three | MWh	0	0
Year four | MWh	0	0
Year five | MWh		0
Sales [Member] | Physical [Member] | Gas Derivative [Member]
Energy Commodity Derivative Volumes [Line Items]
Year one | MMBTU	3,933	5,448
Year two | MMBTU	1,360	1,360
Year three | MMBTU	1,370	1,360
Year four | MMBTU	1,115	1,370
Year five | MMBTU		1,115
Sales [Member] | Financial [Member] | Electric Derivative [Member]
Energy Commodity Derivative Volumes [Line Items]
Year one | MWh	452	451
Year two | MWh	0	0
Year three | MWh	0	0
Year four | MWh	0	0
Year five | MWh		0
Sales [Member] | Financial [Member] | Gas Derivative [Member]
Energy Commodity Derivative Volumes [Line Items]
Year one | MMBTU	31,485	39,273
Year two | MMBTU	9,323	12,030
Year three | MMBTU	228	900
Year four | MMBTU	0	0
Year five | MMBTU		0