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Investment Securities - Unrealized Losses on Securities Available-for-Sale (Details) - USD ($)	3 Months Ended
	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]
Gain (Loss) on Investments	$ 0	$ (454,000)	$ 0
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	370,580,000	564,892,000
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(1,065,000)	(3,247,000)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,369,638,000	1,365,958,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(243,419,000)	(277,257,000)
Debt Securities, Available-for-sale, Unrealized Loss Position	1,740,218,000	1,930,850,000
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(244,484,000)	(280,504,000)
Agency residential MBS
Debt Securities, Available-for-sale [Line Items]
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	867,042,000	861,840,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(166,632,000)	(189,761,000)
Debt Securities, Available-for-sale, Unrealized Loss Position	867,042,000	861,840,000
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(166,632,000)	(189,761,000)
Agency commercial MBS
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	49,911,000	40,291,000
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(41,000)	(87,000)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	11,293,000	11,273,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(881,000)	(959,000)
Debt Securities, Available-for-sale, Unrealized Loss Position	61,204,000	51,564,000
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(922,000)	(1,046,000)
Agency residential CMOs
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	27,981,000	273,347,000
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(66,000)	(1,994,000)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	104,865,000	104,757,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(17,083,000)	(18,917,000)
Debt Securities, Available-for-sale, Unrealized Loss Position	132,846,000	378,104,000
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(17,149,000)	(20,911,000)
Municipal securities
Debt Securities, Available-for-sale [Line Items]
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	597,000	594,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(5,000)	(8,000)
Debt Securities, Available-for-sale, Unrealized Loss Position	597,000	594,000
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(5,000)	(8,000)
Corporate Debt Securities
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	0	15,968,000
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	(32,000)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	240,730,000	241,744,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(26,097,000)	(31,354,000)
Debt Securities, Available-for-sale, Unrealized Loss Position	240,730,000	257,712,000
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(26,097,000)	(31,386,000)
Private Label Collateralized Mortgage Obligations
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	97,388,000	180,915,000
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(285,000)	(1,031,000)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	129,803,000	129,178,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(31,373,000)	(34,681,000)
Debt Securities, Available-for-sale, Unrealized Loss Position	227,191,000	310,093,000
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(31,658,000)	(35,712,000)
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	180,076,000	38,771,000
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(659,000)	(29,000)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Unrealized Loss Position	180,076,000	38,771,000
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(659,000)	(29,000)
Private label commercial MBS
Debt Securities, Available-for-sale [Line Items]
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	11,446,000	12,372,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(1,087,000)	(1,213,000)
Debt Securities, Available-for-sale, Unrealized Loss Position	11,446,000	12,372,000
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(1,087,000)	(1,213,000)
Asset-backed Securities
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	15,224,000	15,600,000
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(14,000)	(74,000)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Debt Securities, Available-for-sale, Unrealized Loss Position	15,224,000	15,600,000
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(14,000)	(74,000)
SBA securities
Debt Securities, Available-for-sale [Line Items]
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	3,862,000	4,200,000
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(261,000)	(364,000)
Debt Securities, Available-for-sale, Unrealized Loss Position	3,862,000	4,200,000
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	$ (261,000)	$ (364,000)

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