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Derivatives and Risk Management - Schedule of Energy Commodity Derivative Volumes (Details) MWh in Thousands, MMBTU in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024 MMBTU MWh	Dec. 31, 2023 MWh MMBTU
Purchase [Member] \| Physical [Member] \| Electric Derivative [Member]
Energy Commodity Derivative Volumes [Line Items]
Year one \| MWh	6	9
Year two \| MWh	0	0
Year three \| MWh	0	0
Year four \| MWh	0
Purchase [Member] \| Physical [Member] \| Gas Derivative [Member]
Energy Commodity Derivative Volumes [Line Items]
Year one \| MMBTU	12,866	22,747
Year two \| MMBTU	24,248	12,505
Year three \| MMBTU	14,663	5,570
Year four \| MMBTU	3,910
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
Purchase [Member] \| Financial [Member] \| Gas Derivative [Member]
Energy Commodity Derivative Volumes [Line Items]
Year one \| MMBTU	19,734	74,596
Year two \| MMBTU	29,315	19,590
Year three \| MMBTU	10,765	3,940
Year four \| MMBTU	1,350
Sales [Member] \| Physical [Member] \| Electric Derivative [Member]
Energy Commodity Derivative Volumes [Line Items]
Year one \| MWh	194	472
Year two \| MWh	348	11
Year three \| MWh	0	0
Year four \| MWh	0
Sales [Member] \| Physical [Member] \| Gas Derivative [Member]
Energy Commodity Derivative Volumes [Line Items]
Year one \| MMBTU	581	1,723
Year two \| MMBTU	1,115	1,115
Year three \| MMBTU	0	0
Year four \| MMBTU	0
Sales [Member] \| Financial [Member] \| Electric Derivative [Member]
Energy Commodity Derivative Volumes [Line Items]
Year one \| MWh	408	510
Year two \| MWh	175	96
Year three \| MWh	0	0
Year four \| MWh	0
Sales [Member] \| Financial [Member] \| Gas Derivative [Member]
Energy Commodity Derivative Volumes [Line Items]
Year one \| MMBTU	2,690	12,038
Year two \| MMBTU	1,125	1,125
Year three \| MMBTU	0	0
Year four \| MMBTU	0