Pension and Postretirement Benefits - Components of Net Periodic Benefit Cost of Pension and Postretirement Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Pension Plans
Net periodic benefit cost:
Net periodic benefit cost	$ 213	$ 234
Total expenses	213	234
Postretirement Benefit Plans
Net periodic benefit cost:
Net periodic benefit cost	78	84
Total expenses	78	84
Domestic Plans | Pension Plans
Net periodic benefit cost:
Service cost	0	0
Interest cost	201	211
Expected return on plan assets	(57)	(40)
Amortization of prior service credit	(10)	(8)
Recognized net actuarial (gain) loss	79	71
Net periodic benefit cost	213	234
Settlement cost	0	0
Total expenses	213	234
Domestic Plans | Postretirement Benefit Plans
Net periodic benefit cost:
Service cost	6	6
Interest cost	91	93
Expected return on plan assets	0	0
Amortization of prior service credit	19	29
Recognized net actuarial (gain) loss	(38)	(44)
Net periodic benefit cost	78	84
Settlement cost	0	0
Total expenses	78	84
Foreign Pension Plans
Net periodic benefit cost:
Service cost	51	44
Interest cost	85	92
Expected return on plan assets	(84)	(86)
Amortization of prior service credit	0	0
Recognized net actuarial (gain) loss	32	33
Net periodic benefit cost	84	83
Settlement cost	0	0
Total expenses	84	83
Foreign Pension Plans | Pension Plans
Net periodic benefit cost:
Net periodic benefit cost	84	83
Total expenses	$ 84	$ 83