Accumulated Other Comprehensive Income (Loss) - Schedule Of The Changes In Components Of Accumulated Other Comprehensive Income (Loss) Balances (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 7,929,465	$ 7,023,232	$ 7,723,054	$ 6,950,834
Net unrealized gains (losses) arising during the period	27,868	(10,216)	110,558	(72,338)
Amounts reclassified from AOCI	4,767	18,776	12,322	38,761
Other comprehensive income (loss)	32,635	8,560	122,880	(33,577)
Ending balance	8,201,767	7,215,114	8,201,767	7,215,114
Debt Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(482,175)	(601,510)	(542,152)	(601,881)
Net unrealized gains (losses) arising during the period	14,926	8,773	72,303	6,491
Amounts reclassified from AOCI	683	1,451	3,283	4,104
Other comprehensive income (loss)	15,609	10,224	75,586	10,595
Ending balance	(466,566)	(591,286)	(466,566)	(591,286)
Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	10,493	(43,706)	(20,787)	2,624
Net unrealized gains (losses) arising during the period	14,045	(17,678)	40,370	(81,340)
Amounts reclassified from AOCI	4,084	17,325	9,039	34,657
Other comprehensive income (loss)	18,129	(353)	49,409	(46,683)
Ending balance	28,622	(44,059)	28,622	(44,059)
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(23,333)	(17,517)	(22,321)	(21,339)
Net unrealized gains (losses) arising during the period	(1,103)	(1,311)	(2,115)	2,511
Amounts reclassified from AOCI	0	0	0	0
Other comprehensive income (loss)	(1,103)	(1,311)	(2,115)	2,511
Ending balance	(24,436)	(18,828)	(24,436)	(18,828)
AOCI, Net of Tax
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(495,015)	(662,733)	(585,260)	(620,596)
Other comprehensive income (loss)	32,635	8,560	122,880	(33,577)
Ending balance	$ (462,380)	$ (654,173)	$ (462,380)	$ (654,173)