Other Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive (Loss) Income (Loss) (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	$ 3,582,934	$ 2,952,831	$ 3,611,967	$ 2,974,855
Other comprehensive income (loss) before reclassifications			13,131	(70,688)
Less: Amounts reclassified from accumulated other comprehensive loss			(271,671)	(24,750)
Net current-period other comprehensive income (loss)	24,252	584	284,802	(45,938)
Ending balance	3,683,891	2,967,473	3,683,891	2,967,473
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(323,779)	(654,874)	(584,329)	(608,352)
Net current-period other comprehensive income (loss)	24,252	584	284,802	(45,938)
Ending balance	(299,527)	(654,290)	(299,527)	(654,290)
Unrealized Gains and (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	39,821	(5,857)	8,812	(33,416)
Less: Amounts reclassified from accumulated other comprehensive loss	19,936	(5,463)	(262,391)	(5,463)
Net current-period other comprehensive income (loss)	19,885	(394)	271,203	(27,953)
Ending balance	(312,672)	(612,196)	(312,672)	(612,196)
Unrealized Gains and (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	(312)	(8,673)	4,319	(37,272)
Less: Amounts reclassified from accumulated other comprehensive loss	(5,770)	(10,167)	(11,506)	(20,319)
Net current-period other comprehensive income (loss)	5,458	1,494	15,825	(16,953)
Ending balance	(10,645)	(48,524)	(10,645)	(48,524)
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			2,226	1,032
Net current-period other comprehensive income (loss)	(1,091)	(516)	(2,226)	(1,032)
Ending balance	$ 23,790	$ 6,430	$ 23,790	$ 6,430