Condensed Consolidated Statements of Comprehensive Income (Loss) (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 42,467	$ 22,663	$ 161,205	$ 95,645
Unrealized gains (losses) on marketable securities, net of taxes	112	(176)	(130)	131
Foreign currency translation adjustments	(956)	982	(1,954)	966
Other comprehensive income (loss)	(844)	806	(2,084)	1,097
Comprehensive income	$ 41,623	$ 23,469	$ 159,121	$ 96,742