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LOANS AND ALLOWANCE FOR CREDIT LOSSES - TDR, Recorded Investment and Number of Modifications (Details)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2022
loan
Sep. 30, 2021
loan
Sep. 30, 2022
USD ($)
loan
Sep. 30, 2021
loan
Dec. 31, 2021
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Borrower's sustained repayment performance period     6 months    
Number of Modifications | loan 0 0 0 0  
Total residential real estate | Residential mortgages          
Accounts, Notes, Loans and Financing Receivable [Line Items]          
Residential mortgage loans collateralized by real estate property in the process of foreclosure | $     $ 249   $ 574