Condensed Consolidated Statements of Comprehensive Income (Unaudited) - 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	$ 20,608	$ 22,549	$ 38,006	$ 42,708
Other comprehensive income (loss):
Foreign currency translation adjustment	(4)	(52)	48	158
Tax benefit (provision)	1	15	(13)	(37)
Comprehensive income	$ 20,605	$ 22,512	$ 38,041	$ 42,829