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ALLOWANCE FOR LOAN LOSSES (Assessment of Credit Quality) (Details) - USD ($)
9 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Mar. 31, 2018
Financing Receivable, Recorded Investment [Line Items]      
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment $ 46,300,000 $ 42,100,000  
Gross loan balance 1,258,907,905 1,127,419,381 $ 1,004,233,159
Consumer loans- non-bankrupt accounts [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Gross loan balance 1,252,645,902 1,121,591,353 998,299,051
Consumer loans- bankrupt accounts [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Gross loan balance 6,262,003 5,828,028 5,934,108
Performing Financing Receivable [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Gross loan balance 1,164,459,600 1,044,690,133 929,400,862
Nonperforming Financial Instruments [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest 94,448,305 82,729,248 74,832,297
New borrower [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Gross loan balance 175,727,060 126,446,949  
New borrower [Member] | New borrower [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Gross loan balance     104,762,628
Former borrower [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Gross loan balance 144,840,392 131,195,579  
Former borrower [Member] | Former borrower [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Gross loan balance     104,281,551
Refinance [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Gross loan balance 917,868,854 850,626,372  
Refinance [Member] | Refinance [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Gross loan balance     778,115,097
Delinquent refinance [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Gross loan balance $ 20,471,599 $ 19,150,481  
Delinquent refinance [Member] | Delinquent refinance [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Gross loan balance     $ 17,073,883