Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 95,894	$ 77,491	$ 81,800
Other comprehensive (loss) income:
Cumulative translation adjustment	(1,078)	(1,399)	(24,898)
Unrealized gains (losses) on marketable securities, net of tax expense (benefit) of $65, $0, and ($15), respectively	192	(35)	47
Total other comprehensive loss	(886)	(1,434)	(24,851)
Comprehensive income	$ 95,008	$ 76,057	$ 56,949