CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - 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	$ 265,065	$ 342,073	$ 383,583	$ 470,885
Other comprehensive income (loss):
Unrealized gains (losses) on investments	(14,512)	(48,188)	21,044	(129,229)
Unrealized gains (losses) on cash flow hedges	7,575	15,895	(7,424)	68,425
Total unrealized gains (losses)	(6,937)	(32,293)	13,620	(60,804)
Income tax (expense) benefit	1,706	7,808	(3,314)	14,702
Other comprehensive income (loss), net of tax (expense) benefit	(5,231)	(24,485)	10,306	(46,102)
Total comprehensive income	$ 259,834	$ 317,588	$ 393,889	$ 424,783