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INVESTMENT SECURITIES - Amortized cost and estimated fair value of available-for-sale securities excluding SBIC (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2022
USD ($)
security
Dec. 31, 2021
USD ($)
security
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost $ 61,022 $ 55,266
Fair Value 58,727 55,562
Debt available for sale securities pledged as collateral $ 15,200 $ 17,300
Threshold Percentage Of Shareholders Equity Amount Held As Securities By One Issuer 10.00% 10.00%
Unrealized loss $ 2,444 $ 182
Available for sale securities, excluding SBIC    
Debt Securities, Available-for-sale [Line Items]    
Due within one year amortized cost 254  
Due between one year and five years amortized cost 374  
Due between five years and ten years amortized cost 18,207  
Due after ten years, amortized cost 1,484  
Securities (CMO and MBS), amortized cost 40,703  
Amortized Cost 61,022  
Due within one year fair value 252  
Due between one year and five years fair value 361  
Due between five years and ten years fair value 18,146  
Due after ten years, fair value 1,430  
Securities (CMO and MBS), fair value 38,538  
Fair Value $ 58,727  
Number of securities in unrealized loss position | security 90 10
Number of securities in continuous unrealized loss position for more than twelve months | security 2