Retirement Plans - Net Pension Expense Domestic and Foreign (Details) - Pension Plans - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Net pension expense (income)
Total (income) expense, net	$ 66	$ 65	$ 133	$ 130
UNITED STATES
Net pension expense (income)
Service cost	0	0	0	0
Interest cost	10	5	19	10
Expected return on plan assets	0	0	0	0
Amortization of loss	5	8	11	16
Total (income) expense, net	15	13	30	26
Foreign Plan
Net pension expense (income)
Service cost	5	6	11	12
Interest cost	9	4	19	8
Expected return on plan assets	(6)	(3)	(13)	(6)
Amortization of loss	43	45	86	90
Total (income) expense, net	$ 51	$ 52	$ 103	$ 104