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Fair Value Disclosures (Details Textuals)
 3 Months Ended
Dec. 31, 2012
Contracts | Maximum
  
Financial Instruments Not Measured At Fair Value [Line Items]  
Initial term of the indirect finance receivables 72 months
Contracts | Minimum
  
Financial Instruments Not Measured At Fair Value [Line Items]  
Initial term of the indirect finance receivables 12 months
Direct Loans | Maximum
  
Financial Instruments Not Measured At Fair Value [Line Items]  
Initial term of the direct finance receivables 48 months
Direct Loans | Minimum
  
Financial Instruments Not Measured At Fair Value [Line Items]  
Initial term of the direct finance receivables 6 months