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ALLOWANCE FOR LOAN LOSSES (Assessment of Credit Quality) (Details) - USD ($)
9 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Mar. 31, 2017
Financing Receivable, Recorded Investment [Line Items]      
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment $ 48,500,000 $ 41,800,000  
Gross loan balance 1,229,304,362 1,165,009,015 $ 1,059,804,132
Consumer loans- non-bankrupt accounts [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Gross loan balance 1,223,476,334 1,159,145,977 1,053,769,654
Consumer loans- bankrupt accounts [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Gross loan balance 5,828,028 5,863,038 6,034,478
Performing Financing Receivable [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Gross loan balance 1,124,326,839 1,076,292,159 977,171,570
Nonperforming Financial Instruments [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest 104,977,523 88,716,856 82,632,562
New borrower [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Gross loan balance 185,408,524 169,425,813  
New borrower [Member] | New borrower [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Gross loan balance     168,656,845
Former borrower [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Gross loan balance 142,002,375 136,401,410  
Former borrower [Member] | Former borrower [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Gross loan balance     108,100,688
Refinance [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Gross loan balance 882,354,941 839,846,451  
Refinance [Member] | Refinance [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Gross loan balance     765,373,325
Delinquent refinance [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Gross loan balance $ 19,538,522 $ 19,335,341  
Delinquent refinance [Member] | Delinquent refinance [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Gross loan balance     $ 17,673,274