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Finance Receivables (Details Textuals 2)	6 Months Ended
Finance Receivables (Details Textuals 2)	Sep. 30, 2012	Sep. 30, 2012 Finance receivables Direct Loans	Sep. 30, 2011 Finance receivables Direct Loans	Sep. 30, 2012 Finance receivables Contracts	Sep. 30, 2011 Finance receivables Contracts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maximum criteria for receivable to be a performing account	61 days
Minimum criteria for receivable to be a non-performing account	61 days
Criteria for receivable to be delinquent account	120 days
Delinquency rate for more than thirty days past due		1.39%	1.01%	5.38%	4.02%