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SECURITIES - Additional Information (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2024
USD ($)
security
Mar. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
security
Dec. 31, 2023
USD ($)
security
Debt and Equity Securities, FV-NI [Line Items]        
Number of securities transferred | security     74  
Transfer of debt securities, fair value     $ 213,700  
Net unrealized holding gain (loss)     $ 5,600  
Reclassification adjustment for realized gains included in net income, tax $ 0 $ 5    
Number of securities holdings | security 0     0
Shareholders equity, percentage 10.00%     10.00%
Collateral Pledged        
Debt and Equity Securities, FV-NI [Line Items]        
Securities pledged to public deposits $ 492,400     $ 489,000