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INVESTMENT SECURITIES (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]
Money market investments	$ 7,107	$ 4,674	$ 6,670
Accrued interest receivable	70,029		71,667
Accrued interest receivable on modified loans	0		127
Securitized GNMA pools retained, amortized cost	$ 19,700	$ 17,400
Securitized GNMA pool retained, yield	4.63%	5.05%
Proceeds from sale of available for sale securities	$ 0
US Treasury securities
Debt Securities, Available-for-sale [Line Items]
Proceeds from sale of available for sale securities		$ 149,413
Gross Losses		$ 7
OIB
Debt Securities, Available-for-sale [Line Items]
Restricted cash	775		525
Oriental Overseas
Debt Securities, Available-for-sale [Line Items]
Restricted cash	525		525
Asset Pledged as Collateral
Debt Securities, Available-for-sale [Line Items]
Pledged assets	1,567,000		1,564,000
Asset Pledged as Collateral | Public Funds
Debt Securities, Available-for-sale [Line Items]
Pledged assets	1,524,000		1,440,000
Debt Securities
Debt Securities, Available-for-sale [Line Items]
Accrued interest receivable	$ 11,100		$ 10,800

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Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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The aggregate fair value as of the balance sheet date of financial instruments and other positions owned by the entity including: (1) mortgages, mortgage-backed and asset backed securities; (2) US government and agency obligations; (3) state and municipal government obligations; (4) other sovereign government debt; (5) corporate obligations; (6) corporate equities; (7) principal investments; (8) derivative contracts; and (9) physical commodities. Includes both pledged and unpledged holdings.

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