CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 199,744	$ 152,400
Foreign currency translation	(5,253)
Unrealized gain on available for sale debt securities, net of tax	263
Comprehensive income	$ 194,754	$ 152,400