Retirement Plans and Other Postretirement Benefits - Components of Net Periodic Benefit Cost (Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 142	$ 135	$ 274	$ 283
Interest cost	604	600	1,208	1,192
Expected loss on plan assets	(899)	(869)	(1,790)	(1,740)
Amortization of net actuarial loss (gain)	61	176	124	351
Net periodic benefit (income) cost	(92)	42	(184)	86
Other Post Retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	11	14	22	28
Interest cost	27	27	54	54
Expected loss on plan assets	0	0	0	0
Amortization of net actuarial loss (gain)	(38)	(29)	(49)	(57)
Net periodic benefit (income) cost	$ 0	$ 12	$ 27	$ 25