Description of Business and Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2012
Leasehold and Land Improvements [Member] | Maximum [Member]
Range of Estimated useful lives
Estimated useful lives	30 years
Leasehold and Land Improvements [Member] | Minimum [Member]
Range of Estimated useful lives
Estimated useful lives	10 years
Buildings [Member] | Maximum [Member]
Range of Estimated useful lives
Estimated useful lives	30 years
Buildings [Member] | Minimum [Member]
Range of Estimated useful lives
Estimated useful lives	10 years
Parts and service equipment [Member] | Maximum [Member]
Range of Estimated useful lives
Estimated useful lives	10 years
Parts and service equipment [Member] | Minimum [Member]
Range of Estimated useful lives
Estimated useful lives	7 years
Office Equipment and Fixtures [Member] | Maximum [Member]
Range of Estimated useful lives
Estimated useful lives	10 years
Office Equipment and Fixtures [Member] | Minimum [Member]
Range of Estimated useful lives
Estimated useful lives	3 years
Company vehicles [Member] | Maximum [Member]
Range of Estimated useful lives
Estimated useful lives	5 years
Company vehicles [Member] | Minimum [Member]
Range of Estimated useful lives
Estimated useful lives	3 years