Accumulated Other Comprehensive Income (Loss) - Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Before-Tax
Net change	$ 119,894	$ (432,490)
Tax Effect
Net change	(34,259)	127,946
Net-of-Tax
Other comprehensive income (loss)	85,635	(304,544)
Debt Securities
Before-Tax
Net unrealized gains (losses) arising during the period	62,860	(399,462)
Net realized gains reclassified into net income	10,000	(1,278)
Amortization of unrealized losses on transferred securities	3,921	3,281
Net change	76,781	(397,459)
Tax Effect
Net unrealized losses arising during the period	(18,585)	118,101
Net realized gains reclassified into net income	(2,956)	378
Amortization of unrealized losses on transferred securities	(1,159)	(970)
Net change	(22,700)	117,509
Net-of-Tax
Net unrealized gains (losses) arising during the period	44,275	(281,361)
Net realized gains reclassified into net income	7,044	(900)
Amortization of unrealized losses on transferred securities	2,762	2,311
Net realized losses (gains) reclassified into net income	9,806	1,411
Other comprehensive income (loss)	54,081	(279,950)
Cash Flow Hedges
Before-Tax
Net unrealized gains (losses) arising during the period	29,843	(32,609)
Net realized losses (gains) reclassified into net income	10,644	(2,100)
Net change	40,487	(34,709)
Tax Effect
Net unrealized losses arising during the period	(8,757)	9,382
Net realized losses (gains) reclassified into net income	(3,117)	604
Net change	(11,874)	9,986
Net-of-Tax
Net unrealized gains (losses) arising during the period	21,086	(23,227)
Net realized losses (gains) reclassified into net income	7,527	(1,496)
Other comprehensive income (loss)	28,613	(24,723)
Foreign Currency Translation Adjustments
Before-Tax
Net unrealized gains (losses) arising during the period	2,626	(322)
Net change	2,626	(322)
Tax Effect
Net unrealized losses arising during the period	315	451
Net change	315	451
Net-of-Tax
Net unrealized gains (losses) arising during the period	2,941	129
Net realized losses (gains) reclassified into net income	0	0
Other comprehensive income (loss)	$ 2,941	$ 129