Retirement Plans and Other Postretirement Benefits - Components of Net Periodic Benefit Cost (Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 130	$ 137
Interest cost	597	390
Expected loss on plan assets	(770)	(933)
Amortization of net actuarial loss (gain)	250	204
Net periodic benefit cost (income)	207	(202)
Other Post Retirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	19	30
Interest cost	32	24
Expected loss on plan assets	0	0
Amortization of net actuarial loss (gain)	(4)	14
Net periodic benefit cost (income)	$ 47	$ 68