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INVESTMENT SECURITIES - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Gross sales of available-for-sale securities $ 38,239 $ 12,091
Gross gains on sale of available-for-sale securities 646 157
Gross losses on sale of available-for-sale securities 73 1
Federal Reserve Bank    
Debt Instrument [Line Items]    
Long-term line of credit 0 0
Line of Credit | Mortgage-backed securities    
Debt Instrument [Line Items]    
Available-for-sale security, restricted 863 1,209
Specific Municipal Deposits | Mortgage-backed securities    
Debt Instrument [Line Items]    
Available-for-sale security, restricted 2,879 3,028
Specific Municipal Deposits | U.S. government agency obligations    
Debt Instrument [Line Items]    
Available-for-sale security, restricted 3,934 576
MPF Credit Enhancement Fee | Mortgage-backed securities    
Debt Instrument [Line Items]    
Available-for-sale security, restricted $ 267 $ 468