CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 75,172	$ 72,840	$ 546,057	$ 854,248
Other comprehensive income (loss):
Unrealized losses on investments	(68,701)	(2,539)	(197,930)	(10,256)
Unrealized gains on cash flow hedges	29,823	5,095	98,248	29,374
Total unrealized gains (losses)	(38,878)	2,556	(99,682)	19,118
Income tax (expense) benefit	9,400	(619)	24,102	(4,621)
Other comprehensive income (loss), net of tax (expense) benefit	(29,478)	1,937	(75,580)	14,497
Total comprehensive income	$ 45,694	$ 74,777	$ 470,477	$ 868,745