Retirement Plans and Other Postretirement Benefits - Components of Net Periodic Benefit Cost (Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 148	$ 130
Interest cost	592	597
Expected loss on plan assets	(871)	(770)
Amortization of net actuarial loss (gain)	175	250
Net periodic benefit cost	44	207
Other Post Retirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	14	19
Interest cost	27	32
Expected loss on plan assets	0	0
Amortization of net actuarial loss (gain)	(28)	(4)
Net periodic benefit cost	$ 13	$ 47