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LOANS AND ALLOWANCE FOR LOAN LOSSES - Narrative (Details) - USD ($)
3 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Allowance for loan losses $ 0 $ 0
Number of days past due after which a retail loan is rated 90 days  
Commercial and industrial    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Payroll protection program loans $ 17,900,000 $ 43,200,000