Investment Securities - Unrealized Losses on Securities Available-for-Sale (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 851,135	$ 94,936
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(6,294)	(131)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	1,252,323	1,295,898
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(197,141)	(196,759)
Debt Securities, Available-for-sale, Unrealized Loss Position	2,103,458	1,390,834
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(203,435)	(196,890)
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	811,661	834,085
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(139,989)	(138,076)
Debt Securities, Available-for-sale, Unrealized Loss Position	811,661	834,085
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(139,989)	(138,076)
Agency commercial MBS
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	18,951	4,994
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(51)	(6)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	32,030	32,006
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(998)	(1,094)
Debt Securities, Available-for-sale, Unrealized Loss Position	50,981	37,000
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(1,049)	(1,100)
Agency residential CMOs
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	748,392	70,270
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(5,689)	(117)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	83,847	101,501
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(14,409)	(15,183)
Debt Securities, Available-for-sale, Unrealized Loss Position	832,239	171,771
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(20,098)	(15,300)
Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	16,319	0
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(181)	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	189,534	188,545
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(14,441)	(15,441)
Debt Securities, Available-for-sale, Unrealized Loss Position	205,853	188,545
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(14,622)	(15,441)
Private label residential CMOs
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	42,560	19,672
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(286)	(8)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	123,921	127,020
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(26,671)	(26,326)
Debt Securities, Available-for-sale, Unrealized Loss Position	166,481	146,692
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(26,957)	(26,334)
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	24,913
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	(87)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0
Debt Securities, Available-for-sale, Unrealized Loss Position	24,913
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(87)
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	8,270	9,279
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(472)	(467)
Debt Securities, Available-for-sale, Unrealized Loss Position	8,270	9,279
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	(472)	(467)
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	3,060	3,462
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(161)	(172)
Debt Securities, Available-for-sale, Unrealized Loss Position	3,060	3,462
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax	$ (161)	$ (172)