Fair Value Disclosures (Details Textuals)	3 Months Ended
	Jun. 30, 2012
Maximum
Financial Instruments Not Measured At Fair Value [Line Items]
Initial term of the indirect finance receivables	72 months
Initial term of the direct finance receivables	48 months
Minimum
Financial Instruments Not Measured At Fair Value [Line Items]
Initial term of the indirect finance receivables	12 months
Initial term of the direct finance receivables	6 months