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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
 6 Months Ended
Jun. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Financing Receivable Portfolio Segments
Loan SegmentHistorical Lifetime Loss MethodHistorical
Lookback
Period		Economic
Forecast
Length		Reversion Method
ConstructionProbability of Default/Loss Given Default ("PD/LGD")2008-PresentOne YearOne Year (straight-line basis)
Commercial real estatePD/LGD2008-Present
Multi-family mortgagePD/LGD2008-Present
Commercial, financial and agriculturalPD/LGD2008-Present
Home equity lines of creditLoss-Rate Migration2008-Present
Residential mortgageLoss-Rate Migration2008-Present
Consumer - other revolvingLoss-Rate Migration2008-Present
Consumer - non-revolvingLoss-Rate Migration2008-Present
Purchased consumer portfolios (Dealer, Other consumer)Weighted-Average Remaining Maturity ("WARM")2008-Present