Guarantees (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Maximum determinable exposure of each type of guarantee and the corresponding liability
Maximum Exposure of Guarantee	$ 30,293	$ 30,792
Carrying Amount of Liability	6,234	6,245
Vehicle Residual Value Guarnatees Operating Lease Programs [Member]
Maximum determinable exposure of each type of guarantee and the corresponding liability
Maximum Exposure of Guarantee		24,558
Carrying Amount of Liability	0	11
Standby letters of credit [Member]
Maximum determinable exposure of each type of guarantee and the corresponding liability
Maximum Exposure of Guarantee	6,234	6,234
Carrying Amount of Liability	$ 6,234	$ 6,234