Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 3,956	$ (513)
Other comprehensive loss net of tax:
Foreign currency translation	(2,301)	(1,920)
Net change in market value of interest rate swap	190	(1,181)
Other comprehensive loss	(2,111)	(3,101)
Comprehensive income (loss)	$ 1,845	$ (3,614)