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Pensions (Details) - Pension Plans [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Components of Net Periodic Pension Cost [Abstract]
Service cost	$ 132	$ 158	$ 265	$ 317
Interest cost	496	465	991	928
Expected return on plan assets	(767)	(792)	(1,534)	(1,583)
Amortization of prior service cost	(3)	(3)	(6)	(6)
Rate-regulated adjustment	142	(106)	284	455
Net periodic pension cost	0	$ (278)	0	$ 111
Employer Contributions [Abstract]
Estimated employer contributions in 2025					$ 0
Employer contributions made in 2025			0
Estimated remaining employer contributions in 2025	$ 0		$ 0

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