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INVESTMENT SECURITIES (Narrative) (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Mar. 31, 2021
Debt Securities, Available-for-sale [Line Items]      
Money market investments $ 5,648 $ 8,952 $ 11,401
Restricted cash 175 175 $ 1,050
Securitized GNMA pools retained, amortized cost $ 24,000 $ 30,000  
Securitized GNMA pool retained, yield 2.37% 2.22%  
12 months or more $ 85,355 $ 0  
Held to maturity securities in continuous loss position for 12 months or more   0  
Asset Pledged as Collateral      
Debt Securities, Available-for-sale [Line Items]      
Pledged assets 200,400 145,600  
OIB      
Debt Securities, Available-for-sale [Line Items]      
Restricted cash 305 305  
Oriental Overseas      
Debt Securities, Available-for-sale [Line Items]      
Restricted cash 325 325  
Public Funds | Asset Pledged as Collateral      
Debt Securities, Available-for-sale [Line Items]      
Pledged assets $ 199,700 $ 143,800