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	$ (62,348)	$ 15,983	$ 7,457
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(1,984)	2,825	(664)
Benefit pension plan adjustments			(6)
Total other comprehensive income (loss), net of tax	(1,984)	2,825	(670)
Comprehensive income	$ (64,332)	$ 18,808	$ 6,787