Other Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 3,611,967	$ 2,974,855
Other comprehensive income (loss) before reclassifications	(26,378)	(56,158)
Less: Amounts reclassified from accumulated other comprehensive loss	(286,928)	(9,636)
Net current-period other comprehensive income (loss)	260,550	(46,522)
Ending balance	3,582,934	2,952,831
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(584,329)	(608,352)
Ending balance	(323,779)	(654,874)
Unrealized Losses on Available for Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(583,875)	(584,243)
Other comprehensive income (loss) before reclassifications	(31,009)	(27,559)
Less: Amounts reclassified from accumulated other comprehensive loss	(282,327)	0
Net current-period other comprehensive income (loss)	251,318	(27,559)
Ending balance	(332,557)	(611,802)
Unrealized Losses on Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(26,470)	(31,571)
Other comprehensive income (loss) before reclassifications	4,631	(28,599)
Less: Amounts reclassified from accumulated other comprehensive loss	(5,736)	(10,152)
Net current-period other comprehensive income (loss)	10,367	(18,447)
Ending balance	(16,103)	(50,018)
Defined Benefit Pension Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	26,016	7,462
Other comprehensive income (loss) before reclassifications	0	0
Less: Amounts reclassified from accumulated other comprehensive loss	1,135	516
Net current-period other comprehensive income (loss)	(1,135)	(516)
Ending balance	$ 24,881	$ 6,946