Allowance for Credit Losses (Details Textuals) (USD $) In Thousands, unless otherwise specified			3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Minimum [Member]	Mar. 31, 2013 Maximum [Member]
Allowance for credit losses (Textuals)
Period required for considering financing receivable as non accrual status			60 days	89 days
Period for placing financing receivables on non-accrual status			89 days
The recorded investment in past-due finance lease receivables on nonaccrual status	$ 2,271	$ 2,060
Past Due Period Of Financing Receivable Accruing Interest			90 days
Interest accrued in the recorded investment in finance lease receivable	0	0
The recorded investment in impaired notes receivable	1,621	2,047
The recorded investment in impaired notes related allowance	$ 1,621	$ 2,047