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ALLOWANCE FOR LOAN LOSSES Financing Receivables (Details) - USD ($)
Dec. 31, 2018
Mar. 31, 2018
Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and Leases Receivable, Gross $ 1,258,907,905 $ 1,004,233,159 $ 1,127,419,381
Small loans [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and Leases Receivable, Gross 857,945,959 670,189,211 774,416,024
Large loans [Member] [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and Leases Receivable, Gross 400,961,429 334,041,731 352,999,300
Sales finance loans [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and Leases Receivable, Gross $ 517 $ 2,217 $ 4,057