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INVESTMENT SECURITIES - Narrative (Details)
12 Months Ended
Dec. 31, 2022
USD ($)
security
Dec. 31, 2021
USD ($)
security
Dec. 31, 2020
USD ($)
Debt Securities, Available-for-sale [Line Items]      
Cumulative OTTI $ 0 $ 0 $ 0
Gain (loss) on investments 10,000 638,000  
Investment securities 513,728,000 472,438,000  
Proceeds from sale of investment securities 31,330,000 149,038,000 0
Collateral Pledged      
Debt Securities, Available-for-sale [Line Items]      
Investment securities pledged to secure public funds 396,800,000 295,600,000  
Non-agency CMOs      
Debt Securities, Available-for-sale [Line Items]      
Gain (loss) on investments (171,000)    
Investment securities 39,758,000 29,698,000  
Non-agency Collateralized Mortgage Obligations-Called      
Debt Securities, Available-for-sale [Line Items]      
Investment securities 14,700,000    
Equity securities      
Debt Securities, Available-for-sale [Line Items]      
Gain (loss) on investments     $ (16,000)
Investment securities      
Debt Securities, Available-for-sale [Line Items]      
Investment securities $ 31,300,000 $ 148,400,000  
Number of Investments Securities Sold | security 19 18  
Proceeds from sale of investment securities $ 31,300,000 $ 149,000,000