INVESTMENT SECURITIES (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Money market investments	$ 4,674	$ 3,172	$ 4,623
Restricted cash	0	142
Securitized GNMA pools retained, amortized cost	$ 17,400	$ 16,500
Securitized GNMA pool retained, yield	5.05%	5.19%
Retained FNMA pools	$ 0	$ 4,900
FNMA pools retained, yield		5.30%
Investment securities \| US Treasury securities
Debt Securities, Available-for-sale [Line Items]
Proceeds from sale of available for sale securities	149,400
OIB
Debt Securities, Available-for-sale [Line Items]
Restricted cash	525		325
Oriental Overseas
Debt Securities, Available-for-sale [Line Items]
Restricted cash	325		325
Asset Pledged as Collateral
Debt Securities, Available-for-sale [Line Items]
Pledged assets	1,617,000		1,624,000
Asset Pledged as Collateral \| Public Funds
Debt Securities, Available-for-sale [Line Items]
Pledged assets	$ 1,570,000		$ 1,575,000

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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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Investment in short-term money-market instruments (such as commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and so forth) which are highly liquid (that is, readily convertible to known amounts of cash) and so near their maturity that they present an insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify as cash equivalents by definition. Original maturity means an original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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