Condensed Consolidated Statements of Comprehensive Income - 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	$ 491,885	$ 299,099	$ 928,358	$ 571,358
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	41	(2,359)	333	(2,732)
Available-for-sale investments:
Change in net unrealized gains (losses) on available-for-sale securities	(3,744)	(8,459)	4,509	(30,287)
Reclassification adjustment included in net income	0	0	3,858	0
Other comprehensive income (loss)	(3,703)	(10,818)	8,700	(33,019)
Comprehensive income	$ 488,182	$ 288,281	$ 937,058	$ 538,339