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Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 24,844	$ 9,990	$ (9,570)
Other comprehensive income (loss), net of tax:
Foreign currency translation	(3,083)	4,884	401
Net change in market value of interest rate swap	609	(717)	(104)
Net change in market value of investments	(25)	0	0
Other comprehensive income (loss)	(2,499)	4,167	297
Comprehensive income (loss)	$ 22,345	$ 14,157	$ (9,273)

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