Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 152,354	$ 157,757
Other comprehensive income (loss), net of tax (Note 15)
Unrealized holding gains (losses) on investments arising during the period for which an allowance for expected losses has not been recognized	(34,487)	65,854
Less: Reclassification adjustment for net gains (losses) on investments included in net income
Net realized gains (losses) on disposals and non-credit related impairment losses	(2,910)	(4,133)
Net unrealized gains (losses) on investments	(31,577)	69,987
Other adjustments to comprehensive income (loss), net	(68)	179
Other comprehensive income (loss), net of tax	(31,645)	70,166
Comprehensive income (loss)	$ 120,709	$ 227,923