Retirement Plans, Components of Net Periodic Benefit Cost, Other Postretirement Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Recognition of actuarial gain	$ (51,149)	$ (22,438)	$ (58,147)
Other Postretirement Benefits [Member]
Components of net periodic benefit cost [Abstract]
Interest cost	20	22	17
Amortization of actuarial gain	(280)	(344)	(394)
Net periodic benefit cost	(260)	(322)	(377)
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss) [Abstract]
Current year actuarial loss (gain)	(3)	65	(58)
Recognition of actuarial gain	280	344	394
Total recognized in other comprehensive income	277	409	336
Total recognized in net periodic benefit cost and other comprehensive income	$ 17	$ 87	$ (41)