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Finance Receivables (Details 3) (USD $)
Dec. 31, 2012
Mar. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financing Receivable, Gross $ 389,380,493 $ 388,988,355
Finance receivables | Contracts
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financing Receivable, Gross 380,519,395 382,766,667
Finance receivables | Contracts | Non-bankrupt accounts
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financing Receivable, Gross 379,983,971 382,358,608
Finance receivables | Contracts | Bankrupt accounts
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financing Receivable, Gross 535,424 408,059
Finance receivables | Contracts | Performing accounts
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financing Receivable, Gross 373,735,506 380,213,503
Finance receivables | Contracts | Non-performing accounts
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financing Receivable, Gross 6,783,889 2,553,164
Finance receivables | Direct Loans
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financing Receivable, Gross 8,861,098 6,221,688
Finance receivables | Direct Loans | Non-bankrupt accounts
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financing Receivable, Gross 8,841,768 6,221,688
Finance receivables | Direct Loans | Bankrupt accounts
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financing Receivable, Gross 19,330   
Finance receivables | Direct Loans | Performing accounts
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financing Receivable, Gross 8,809,302 6,202,498
Finance receivables | Direct Loans | Non-performing accounts
   
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Financing Receivable, Gross $ 51,796 $ 19,190