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LOANS - Additional Information (Details)
 12 Months Ended
Dec. 31, 2022
USD ($)
Contract
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Financing Receivable Recorded Investment Past Due [Line Items]      
Loans held for sale, at lower of cost or fair value $ 15,626,000 $ 34,051,000  
Gain (loss) on loans held for sale at lower of cost or fair value   1,142,000 $ 7,426,000
Loan receivable, validate risk ratings performed for large sample or new lending to existing relationships 1,000,000    
Loan receivable, validate risk ratings performed for criticized and classified rated borrowers with relationship exposure, value 500,000    
Loan receivable, validate risk ratings performed for new regulation "O" loan commitments, value 1,000,000    
Loan receivable validate risk ratings performed for leveraged loans, value 1,000,000    
Loan receivable validate risk ratings performed for no borrower with commitments, value 500,000    
Loan modifications 947,000,000.0    
Troubled debt restructurings specific reserves to customers $ 1,200,000 0  
Deferral [Member]      
Financing Receivable Recorded Investment Past Due [Line Items]      
Bank modified loans and contracts | Contract 542    
Substandard [Member]      
Financing Receivable Recorded Investment Past Due [Line Items]      
Financing receivable individually evaluated loan $ 14,700,000 15,700,000  
Minimum [Member]      
Financing Receivable Recorded Investment Past Due [Line Items]      
Loan receivable, validate risk ratings performed for large sample of borrowers with relationship, value 1,000,000    
Maximum [Member]      
Financing Receivable Recorded Investment Past Due [Line Items]      
Loan receivable, validate risk ratings performed for small sample of borrowers with relationship, value $ 1,000,000    
Potential Problem Loans      
Financing Receivable Recorded Investment Past Due [Line Items]      
Loans held for sale, at lower of cost or fair value   6,700,000  
Gain (loss) on loans held for sale at lower of cost or fair value   282,000  
Residential Mortgage [Member]      
Financing Receivable Recorded Investment Past Due [Line Items]      
Loans held for sale, at lower of cost or fair value   12,200,000  
Gain (loss) on loans held for sale at lower of cost or fair value   362,000  
Paycheck Protection Program [Member]      
Financing Receivable Recorded Investment Past Due [Line Items]      
Loans held for sale, at lower of cost or fair value   56,500,000 355,000,000.0
Gain (loss) on loans held for sale at lower of cost or fair value   $ 1,100,000 $ 7,400,000