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INVESTMENT SECURITIES - Narrative (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
USD ($)
Jun. 30, 2022
USD ($)
Jun. 30, 2023
USD ($)
Jun. 30, 2022
USD ($)
security
Dec. 31, 2022
USD ($)
Debt Securities, Available-for-sale [Line Items]          
Investment securities $ 508,612   $ 508,612   $ 513,728
Number of investments securities, partially sold | security       1  
Proceeds from sale of investment securities 0 $ 0 0 $ 3,075  
Collateral Pledged          
Debt Securities, Available-for-sale [Line Items]          
Investment securities pledged to secure public funds, fair value 400,500   400,500   396,800
Equity Securities          
Debt Securities, Available-for-sale [Line Items]          
(Losses) gain on investments (2) (3) (10) 22  
Debt Securities          
Debt Securities, Available-for-sale [Line Items]          
(Losses) gain on investments       22  
Investment securities   $ 3,100   3,100  
Proceeds from sale of investment securities       3,100  
Non-agency CMOs          
Debt Securities, Available-for-sale [Line Items]          
(Losses) gain on investments       $ 171  
Investment securities $ 40,353   $ 40,353   $ 39,758