Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 5,515	$ (901)	$ 7,379	$ 4,862
Other comprehensive (loss) income, net of tax:
Interest rate swap	(293)	55	(506)	248
Foreign currency translation	(744)	(3,292)	234	(1,282)
Comprehensive (loss) income	$ 4,478	$ (4,138)	$ 7,107	$ 3,828