CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 581,391	$ 469,014	$ 1,160,513
Other comprehensive income (loss):
Unrealized gains (losses) on investments	59,205	(194,157)	(26,606)
Unrealized gains (losses) on cash flow hedges	(34,457)	93,731	48,111
Total unrealized gains (losses)	24,748	(100,426)	21,505
Income tax (expense) benefit	(5,982)	24,453	(5,202)
Other comprehensive income (loss), net of tax (expense) benefit	18,766	(75,973)	16,303
Total comprehensive income	$ 600,157	$ 393,041	$ 1,176,816