Acquisitions (Details Textuals) (USD $)	3 Months Ended	6 Months Ended		3 Months Ended	12 Months Ended			6 Months Ended
	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012 Euroway Ltd. [Member]	Dec. 31, 2012 Euroway Ltd. [Member]	Jun. 30, 2013 Euroway Ltd. [Member]	Aug. 01, 2012 Euroway Ltd. [Member] Vehicle	Jun. 30, 2013 Other Acquisitions Completed in Prior Years [Member]	Jun. 30, 2012 Other Acquisitions Completed in Prior Years [Member]
Acquisitions (Textuals) [Abstract]
Purchase Price							$ 2,400,000
Noncash or Part Noncash Acquisition, Debt Assumed					20,300,000
Number of full service lease vehicles							560
Business Acquisition Number Of Contract Maintenance Vehicles Acquired							800
Payments to Acquire Businesses	350,000	1,420,000	2,426,000	1,200,000				1,420,000	2,426,000
Business Acquisition, Contingent Consideration, Potential Cash Payment							500,000
Goodwill						6,500,000
Customer relationship intangibles						$ 2,800,000