Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 1,352,446	$ 840,854	$ 634,557
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(3,215)	(1,381)	1,514
Available-for-sale investments:
Changes in net unrealized gains (losses) on available-for-sale securities	(23,025)	(7,157)	8,013
Less: reclassification adjustment for net (gains) losses included in net income	632	0	(9,432)
Other comprehensive income (loss)	(25,608)	(8,538)	95
Comprehensive income	$ 1,326,838	$ 832,316	$ 634,652