Employee Benefit Plans - Net periodic pension costs (Details) - Foreign Plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Service cost (gross)	$ 1,107	$ 1,587	$ 1,549
Interest cost	138	53	106
Expected return on plan assets	(288)	(302)	(271)
Amortization of unrecognized actuarial gain	(90)	(12)	(40)
Net periodic pension cost	$ 867	$ 1,326	$ 1,344