Retirement Plans and Other Postretirement Benefits - Components of Net Periodic Benefit Cost (Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 141	$ 133	$ 424	$ 399
Interest cost	596	590	1,788	1,774
Expected loss on plan assets	(870)	(762)	(2,610)	(2,293)
Amortization of net actuarial loss (gain)	175	250	526	750
Net periodic benefit cost	42	211	128	630
Other Post Retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	14	19	42	57
Interest cost	27	32	81	96
Expected loss on plan assets	0	0	0	0
Amortization of net actuarial loss (gain)	(28)	(3)	(85)	(11)
Net periodic benefit cost	$ 13	$ 48	$ 38	$ 142