Consolidated Statements Of Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income		$ 134,352	$ 160,816	$ 291,891	$ 334,365
Other comprehensive income/(loss), net of tax:
Changes in unrealized gains/(losses) on available-for-sale securities	[1],[2]	(13,651)	(57,699)	9,059	(135,530)
Foreign currency translation adjustment	[1]	957	10,260	4,386	20,769
Total other comprehensive income/(loss), net of tax		(12,694)	(47,439)	13,445	(114,761)
Comprehensive income		$ 121,658	$ 113,377	$ 305,336	$ 219,604

[1] Net of tax benefit of $4.4 million and $17.0 million for the three months ended June 30, 2023 and 2022, respectively. Net of tax expense of $4.6 million and tax benefit of $38.2 million for the six months ended June 30, 2023 and 2022, respectively.

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