Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 8,343	$ 11,837	$ 12,299	$ 11,324
Other comprehensive Income (loss) net of tax:
Foreign currency translation	723	885	(1,578)	(1,035)
Net change in market value of interest rate swap	139	45	329	(1,136)
Other comprehensive Income (loss)	862	930	1,249	(2,171)
Comprehensive income	$ 9,205	$ 12,767	$ 11,050	$ 9,153