Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 872,981	$ 567,797	$ 674,035
Other comprehensive income, net of tax:
Net changes in unrealized (losses) gains on AFS debt securities	(137,950)	54,666	43,402
Net changes in unrealized gains (losses) on cash flow hedges	1,487	(1,230)	0
Foreign currency translation adjustments	1,757	9,297	(3,636)
Other comprehensive (loss) income	(134,706)	62,733	39,766
COMPREHENSIVE INCOME	$ 738,275	$ 630,530	$ 713,801