Consolidated Statements Of Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income		$ 68,161	$ 151,169	$ 360,052	$ 485,534
Other comprehensive income/(loss), net of tax:
Changes in unrealized losses on available-for-sale securities	[1],[2]	(26,172)	(54,290)	(17,113)	(189,820)
Foreign currency translation adjustment	[1]	(3,472)	20,692	914	41,461
Total other comprehensive loss, net of tax		(29,644)	(33,598)	(16,199)	(148,359)
Comprehensive income		$ 38,517	$ 117,571	$ 343,853	$ 337,175

[1] Net of tax benefit of $17.9 million and $12.1 million for the three months ended September 30, 2023 and 2022, respectively. Net of tax benefit of $6.3 million and $50.7 million for the nine months ended September 30, 2023 and 2022, respectively.

[2] There were no reclassifications to earnings for the three months ended September 30, 2023. Net of reclassifications to earnings of realized losses of $5.6 million for the nine months ended September 30, 2023. There were no reclassifications to earnings for the three and nine months ended September 30, 2022.