Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 22,549	$ 19,488	$ 42,708	$ 37,937
Other comprehensive income (loss):
Foreign currency translation adjustment	(52)	(6)	158	(40)
Tax benefit (provision)	15		(37)	7
Comprehensive income	$ 22,512	$ 19,482	$ 42,829	$ 37,904