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	$ 115,661	$ 61,659	$ 341,527	$ 363,243
Other comprehensive loss, net of tax:
Foreign currency translation adjustments	(8,502)	(17,909)	249	(37,090)
Unrealized loss on investments:
Unrealized losses during the period, net of income taxes of $624, $1,194, $581 and $3,303	(2,089)	(4,000)	(1,945)	(11,057)
Reclassification adjustment for losses realized in net income, net of income taxes of $(10), $(24), $(39) and $(120)	35	83	128	401
Total other comprehensive loss, net of tax	(10,556)	(21,826)	(1,568)	(47,746)
Comprehensive income	$ 105,105	$ 39,833	$ 339,959	$ 315,497