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LOANS - Concentrations (Details) - Product Line - Loan concentration - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Percentage of loan portfolio 11.00% 8.60%
Total notes balances $ 276.4 $ 227.0