Consolidated Statements Of Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income		$ 198,077	$ 107,887	$ 371,092	$ 194,476
Other comprehensive income/(loss), net of tax
Changes in unrealized losses on available-for-sale securities	[1]	17,552	76,571	(5,118)	3,344
Changes in unrealized gains/(losses) on cash flow hedging instruments	[2]		4,023		2,317
Foreign currency translation adjustment		2,409	(156)	4,745	(9,978)
Total other comprehensive income/(loss), net of tax		19,961	80,438	(373)	(4,317)
Comprehensive income		$ 218,038	$ 188,325	$ 370,719	$ 190,159

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

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