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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - 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	$ 21,809	$ 39,362	$ 92,858	$ 61,004
Other comprehensive income (loss):
Foreign currency translation adjustments	(1,792)	797	(302)	567
Marketable securities
Change in net unrealized loss	(284)	0	(284)	0
Less: reclassification adjustment for net losses included in net income	0	0	0	0
Net change, net of income tax benefit of $97	(284)	0	(284)	0
Comprehensive income	$ 19,733	$ 40,159	$ 92,272	$ 61,571

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