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Finance Receivables (Details 3) (USD $)
Sep. 30, 2012
Mar. 31, 2012
Sep. 30, 2012
Finance receivables
Direct Loans
Sep. 30, 2011
Finance receivables
Direct Loans
Sep. 30, 2012
Finance receivables
Direct Loans
Non-bankrupt accounts
Sep. 30, 2011
Finance receivables
Direct Loans
Non-bankrupt accounts
Sep. 30, 2012
Finance receivables
Direct Loans
Bankrupt accounts
Sep. 30, 2011
Finance receivables
Direct Loans
Bankrupt accounts
Sep. 30, 2012
Finance receivables
Direct Loans
Performing accounts
Sep. 30, 2011
Finance receivables
Direct Loans
Performing accounts
Sep. 30, 2012
Finance receivables
Direct Loans
Non-performing accounts
Sep. 30, 2011
Finance receivables
Direct Loans
Non-performing accounts
Sep. 30, 2012
Finance receivables
Contracts
Sep. 30, 2011
Finance receivables
Contracts
Sep. 30, 2012
Finance receivables
Contracts
Non-bankrupt accounts
Sep. 30, 2011
Finance receivables
Contracts
Non-bankrupt accounts
Sep. 30, 2012
Finance receivables
Contracts
Bankrupt accounts
Sep. 30, 2011
Finance receivables
Contracts
Bankrupt accounts
Sep. 30, 2012
Finance receivables
Contracts
Performing accounts
Sep. 30, 2011
Finance receivables
Contracts
Performing accounts
Sep. 30, 2012
Finance receivables
Contracts
Non-performing accounts
Sep. 30, 2011
Finance receivables
Contracts
Non-performing accounts
Accounts, Notes, Loans and Financing Receivable [Line Items]                                            
Financing Receivable, Gross $ 396,859,826 $ 388,988,355 $ 8,075,902 $ 5,721,768 $ 8,069,213 $ 5,721,768 $ 6,689    $ 8,058,056 $ 5,685,981 $ 17,846 $ 35,787 $ 388,783,924 $ 377,297,796 $ 388,182,955 $ 376,895,455 $ 600,969 $ 402,341 $ 383,165,822 $ 373,068,536 $ 5,618,102 $ 4,229,260