Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

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Subsequent Events (Details) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Dealership
Subsequent Events (Textual) [Abstract]    
Number of dealership disposed   2
Cash generated from dealership disposition $ 21.0