Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

Derivative and Hedging Instruments (Details-5) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026 USD ($) Counterparty	Sep. 30, 2025 USD ($)	Sep. 30, 2026 USD ($) Counterparty	Sep. 30, 2025 USD ($)	Dec. 31, 2025 USD ($)
Counterparties in net liability position or default [Abstract]
Derivative, net liability position of counterparties	$ 0		$ 0		$ 0
Number of counterparties in default \| Counterparty	0		0
Commodity Contract [Member] \| Fuel For Electric Generation Purchased Power [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized losses (gains) on income statement	$ 174	$ 288	$ (392)	$ 884
Commodity Contract [Member] \| Cost Of Gas Sold Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized losses (gains) on income statement	0	0	(2,231)	(203)
Financial Transmission Rights [Member] \| Fuel For Electric Generation Purchased Power [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized losses (gains) on income statement	1,161	262	929	860
Financial Transmission Rights [Member] \| Cost Of Gas Sold Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized losses (gains) on income statement	$ 0	$ 0	$ 0	$ 0