Investment Securities - Unrealized Losses on Securities Available-for-Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 564,892	$ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(3,247)	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,365,958	2,298,565
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(277,257)	(352,454)
Debt Securities, Available-for-sale, Unrealized Loss Position	1,930,850	2,298,565
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(280,504)	(352,454)
Residential Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	861,840	1,187,609
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(189,761)	(201,192)
Debt Securities, Available-for-sale, Unrealized Loss Position	861,840	1,187,609
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(189,761)	(201,192)
Commercial Mortgage Backed Securities [Member]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	40,291	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(87)	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	11,273	253,306
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(959)	(15,333)
Debt Securities, Available-for-sale, Unrealized Loss Position	51,564	253,306
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(1,046)	(15,333)
Government agency and government-sponsored enterprise collateralized mortgage obligations [Member]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	273,347	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(1,994)	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	104,757	284,334
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(18,917)	(36,650)
Debt Securities, Available-for-sale, Unrealized Loss Position	378,104	284,334
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(20,911)	(36,650)
US States and Political Subdivisions Debt Securities [Member]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	594	28,083
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(8)	(1,109)
Debt Securities, Available-for-sale, Unrealized Loss Position	594	28,083
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(8)	(1,109)
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	15,968	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(32)	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	241,744	265,431
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(31,354)	(60,254)
Debt Securities, Available-for-sale, Unrealized Loss Position	257,712	265,431
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(31,386)	(60,254)
Private Label Collateralized Mortgage Obligations [Member]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	180,915	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(1,031)	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	129,178	158,412
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(34,681)	(34,659)
Debt Securities, Available-for-sale, Unrealized Loss Position	310,093	158,412
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(35,712)	(34,659)
Collateralized Loan Obligations [Member]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	38,771	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(29)	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	66,886
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	(752)
Debt Securities, Available-for-sale, Unrealized Loss Position	38,771	66,886
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(29)	(752)
Mortgage-backed Securities, Issued by Private Enterprises
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	12,372	20,813
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(1,213)	(1,313)
Debt Securities, Available-for-sale, Unrealized Loss Position	12,372	20,813
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(1,213)	(1,313)
Asset-backed Securities [Member]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	15,600	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(74)	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	19,952
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	(289)
Debt Securities, Available-for-sale, Unrealized Loss Position	15,600	19,952
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(74)	(289)
SBA asset-backed securities [Member]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	4,200	13,739
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(364)	(903)
Debt Securities, Available-for-sale, Unrealized Loss Position	4,200	13,739
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ (364)	$ (903)

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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