Condensed Consolidated Statements of Comprehensive Income - 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	$ 545,327	$ 353,999	$ 1,473,685	$ 925,357
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(1,378)	(2,574)	(1,045)	(5,306)
Available-for-sale investments:
Change in net unrealized gains (losses) on available-for-sale securities	3,446	(3,236)	7,955	(33,523)
Reclassification adjustment included in net income	(26)	0	3,832	0
Other comprehensive income (loss)	2,042	(5,810)	10,742	(38,829)
Comprehensive income	$ 547,369	$ 348,189	$ 1,484,427	$ 886,528