Consolidated Statements Of Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income		$ 192,376	$ 120,527	$ 563,468	$ 315,003
Other comprehensive income/(loss), net of tax
Changes in unrealized gains/(losses) on available-for-sale securities	[1]	2,971	19,123	(2,147)	22,467
Changes in unrealized losses on cash flow hedging instruments	[2]		(2,968)		(651)
Foreign currency translation adjustment		(8,652)	7,946	(3,907)	(2,032)
Total other comprehensive income/(loss), net of tax		(5,681)	24,101	(6,054)	19,784
Comprehensive income		$ 186,695	$ 144,628	$ 557,414	$ 334,787

[1] There were no reclassifications to earnings for the three and nine months ended September 30, 2021. Reclassifications to earnings were immaterial for the three and nine months ended September 30, 2020.

[2] Reclassifications to earnings were immaterial for the three and nine months ended September 30, 2021 and 2020.