Derivative and Hedging Instruments (Details-1) $ in Thousands		12 Months Ended
		Dec. 31, 2025 USD ($) Dth1 MWh MW	Dec. 31, 2024 USD ($) Dth1 MWh MW
Commodity Contracts And Financial Transimission Rights [Member]
Derivative Fair Values [Abstract]
Derivative fair value, net		$ 1,400	$ (100)
Commodity Contract [Member]
Notional Disclosures [Abstract]
Notional amount, energy measure (in MWh) | MWh		224,360	307,640
Notional amount, decatherm measure (in Dth) | Dth1		8,230,000	6,285,000
Derivative Fair Values [Abstract]
Asset Derivatives, fair value, gross basis		$ 814	$ 1,213
Liability Derivatives, fair value, gross basis		2,565	1,261
Collateral posted against derivative positions		0	0
Commodity Contract [Member] | Other Current Liabilities [Member]
Derivative Fair Values [Abstract]
Asset Derivatives, fair value, gross basis	[1]	448	927
Liability Derivatives, fair value, gross basis	[1]	2,380	1,121
Commodity Contract [Member] | Other Deferred Liabilities and Other [Member]
Derivative Fair Values [Abstract]
Asset Derivatives, fair value, gross basis	[1]	366	286
Liability Derivatives, fair value, gross basis	[1]	185	140
Commodity Contract [Member] | Cash Flow Hedging [Member]
Derivative Fair Values [Abstract]
Derivative, right to reclaim collateral (receivable)		$ 1,800	$ 100
Financial Transmission Rights [Member]
Notional Disclosures [Abstract]
Notional amount, power measure (in MW) | MW		2,413	2,131
Derivative Fair Values [Abstract]
Asset Derivatives, fair value, gross basis		$ 337	$ 108
Collateral posted against derivative positions		0	0
Financial Transmission Rights [Member] | Other Current Assets [Member]
Derivative Fair Values [Abstract]
Asset Derivatives, fair value, gross basis		337	108
Liability Derivatives, fair value, gross basis		$ 0	$ 0
Energy Related Commodity Contract [Member] | Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Maximum term of derivative hedging contract		4 years

[1] As of December 31, 2025, and 2024, collateral of $1.8 million and less than $0.1 million, respectively, was posted against and netted with derivative liability positions. The fair value of the derivatives disclosed in this table has not been adjusted for the collateral posted.