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Derivatives and Risk Management - Schedule of Energy Commodity Derivative Volumes (Details) MWh in Thousands, MMBTU in Thousands | 3 Months Ended | 12 Months Ended
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Mar. 31, 2022 MWh MMBTU | Dec. 31, 2021 MWh MMBTU
Purchase [Member] | Physical [Member] | Electric Derivative [Member] |  |
Energy Commodity Derivative Volumes [Line Items] |  |
Year one | MWh | 93 | 129
Year two | MWh | 0 | 0
Year three | MWh | 0 | 0
Year four | MWh | 0 | 0
Purchase [Member] | Physical [Member] | Gas Derivative [Member] |  |
Energy Commodity Derivative Volumes [Line Items] |  |
Year one | MMBTU | 5,225 | 7,114
Year two | MMBTU | 603 | 378
Year three | MMBTU | 380 | 228
Year four | MMBTU | 225 | 0
Purchase [Member] | Financial [Member] | Electric Derivative [Member] |  |
Energy Commodity Derivative Volumes [Line Items] |  |
Year one | MWh | 0 | 0
Year two | MWh | 0 | 0
Year three | MWh | 0 | 0
Year four | MWh | 0 | 0
Purchase [Member] | Financial [Member] | Gas Derivative [Member] |  |
Energy Commodity Derivative Volumes [Line Items] |  |
Year one | MMBTU | 46,743 | 61,405
Year two | MMBTU | 37,935 | 23,218
Year three | MMBTU | 6,690 | 3,413
Year four | MMBTU | 0 | 0
Sales [Member] | Physical [Member] | Electric Derivative [Member] |  |
Energy Commodity Derivative Volumes [Line Items] |  |
Year one | MWh | 202 | 234
Year two | MWh | 0 | 0
Year three | MWh | 0 | 0
Year four | MWh | 0 | 0
Sales [Member] | Physical [Member] | Gas Derivative [Member] |  |
Energy Commodity Derivative Volumes [Line Items] |  |
Year one | MMBTU | 5,676 | 3,933
Year two | MMBTU | 1,360 | 1,360
Year three | MMBTU | 1,370 | 1,370
Year four | MMBTU | 1,115 | 1,115
Sales [Member] | Financial [Member] | Electric Derivative [Member] |  |
Energy Commodity Derivative Volumes [Line Items] |  |
Year one | MWh | 671 | 452
Year two | MWh | 216 | 0
Year three | MWh | 0 | 0
Year four | MWh | 0 | 0
Sales [Member] | Financial [Member] | Gas Derivative [Member] |  |
Energy Commodity Derivative Volumes [Line Items] |  |
Year one | MMBTU | 22,843 | 31,485
Year two | MMBTU | 13,920 | 9,323
Year three | MMBTU | 1,525 | 228
Year four | MMBTU | 0 | 0

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