Pension and Postretirement Benefits - Components of Net Periodic Benefit Cost of Pension and Postretirement Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Pension Plans
Net periodic benefit cost:
Net periodic benefit cost	$ 261	$ 195	$ 729	$ 877
Total expenses	261	195	729	877
Postretirement Benefit Plans
Net periodic benefit cost:
Net periodic benefit cost	43	(106)	211	112
Total expenses	43	(106)	211	112
Domestic Plans | Pension Plans
Net periodic benefit cost:
Service cost	0	0	0	0
Interest cost	212	109	634	359
Expected return on plan assets	(15)	21	(95)	70
Amortization of prior service credit	(13)	0	(29)	0
Recognized net actuarial loss	77	65	219	333
Net periodic benefit cost	261	195	729	762
Settlement cost	0	0	0	115
Total expenses	261	195	729	762
Domestic Plans | Postretirement Benefit Plans
Net periodic benefit cost:
Service cost	4	5	16	25
Interest cost	74	26	260	134
Expected return on plan assets	0	0	0	0
Amortization of prior service credit	27	23	85	67
Recognized net actuarial loss	(62)	(160)	(150)	(114)
Net periodic benefit cost	43	(106)	211	112
Settlement cost	0	0	0	0
Total expenses	43	(106)	211	112
Foreign Pension Plans
Net periodic benefit cost:
Service cost	44	75	132	236
Interest cost	94	78	277	245
Expected return on plan assets	(87)	(97)	(259)	(320)
Amortization of prior service credit	0	0	0	0
Recognized net actuarial loss	35	34	102	105
Net periodic benefit cost	86	90	252	266
Settlement cost	0	0	0	533
Total expenses	86	90	252	266
Foreign Pension Plans | Pension Plans
Net periodic benefit cost:
Net periodic benefit cost	86	90	252	799
Total expenses	$ 86	$ 90	$ 252	$ 799