CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income, as reported	$ 403,762	$ 311,369	$ 718,956	$ 590,204
Other comprehensive income (loss):
Change in foreign currency translation adjustment, net of tax	8,235	9,044	(19,696)	(21,555)
Available-for-sale investments:
Change in net unrealized (losses) gains	(183)	200	(160)	504
Net change in available-for-sale investments	(183)	200	(160)	504
Other comprehensive income (loss)	8,052	9,244	(19,856)	(21,051)
Comprehensive income	$ 411,814	$ 320,613	$ 699,100	$ 569,153