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Derivatives and Risk Management - Schedule of Energy Commodity Derivative Volumes (Details) MWh in Thousands, MMBTU in Thousands | 12 Months Ended
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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

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