Consolidated Statements Of Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Statement Of Income And Comprehensive Income [Abstract]
Net income		$ 173,549	$ 173,015
Other comprehensive income/(loss), net of tax
Changes in unrealized losses on available-for-sale securities	[1],[2]	(77,831)	(22,670)
Changes in unrealized gains on cash flow hedging instruments	[1]	13,593	0
Foreign currency translation adjustment	[1]	(3,084)	2,336
Total other comprehensive loss, net of tax	[1]	(67,322)	(20,334)
Comprehensive income		$ 106,227	$ 152,681

[1] Net of tax benefit of $20.8 million and tax benefit of $6.4 million for the three months ended March 31, 2022 and 2021, respectively.

[2] There were no reclassifications to earnings for the three months ended March 31, 2022 and 2021.