Concentration of Credit Risk (Details Textual)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Concentration of Credit Risk (Textual) [Abstract]
Number of states	50
Concentration risk benchmark percentage	5.00%
Finance Leases Portfolio Segment [Member]
Concentration Risk [Line Items]
Percentage accounted for top product	25.00%
Finance Leases Portfolio Segment [Member] | Maximum [Member]
Concentration Risk [Line Items]
Percentage accounted for top product	20.00%
Dealer Concentration Risk [Member]
Concentration Risk [Line Items]
Percentage accounted for top product	4.40%	3.30%	3.20%
Geographic Concentration Risk [Member] | California [Member]
Concentration Risk [Line Items]
Percentage accounted for top product	12.00%	11.00%
Geographic Concentration Risk [Member] | Florida [Member]
Concentration Risk [Line Items]
Percentage accounted for top product	13.00%	13.00%
Geographic Concentration Risk [Member] | Texas [Member]
Concentration Risk [Line Items]
Percentage accounted for top product	8.00%	8.00%
Geographic Concentration Risk [Member] | New York [Member]
Concentration Risk [Line Items]
Percentage accounted for top product	8.00%	9.00%