Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Consolidated Statements of Comprehensive Income
Net income	$ 98,650	$ 49,982	$ 17,034
Other comprehensive (loss) income:
Foreign currency translation adjustments	(1,881)	3,427	(444)
Amortization of actuarial gain (loss) and other adjustments from pension plan, net of tax	211	266	(262)
Total other comprehensive (loss) income	(1,670)	3,693	(706)
Comprehensive income	$ 96,980	$ 53,675	$ 16,328