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	$ 469,014	$ 1,160,513	$ 880,690
Other comprehensive income (loss):
Unrealized gains (losses) on investments	(194,157)	(26,606)	7,764
Unrealized gains (losses) on cash flow hedges	93,731	48,111	(36,511)
Total unrealized gains (losses)	(100,426)	21,505	(28,747)
Income tax (expense) benefit	24,453	(5,202)	6,914
Other comprehensive income (loss), net of tax (expense) benefit	(75,973)	16,303	(21,833)
Total comprehensive income	$ 393,041	$ 1,176,816	$ 858,857