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Shareholders' Equity (Restricted Stock Grants And Shares Surrendered To Satisfy Tax Withholdings) (Details)
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Stockholders' Equity Note [Abstract]    
Shares issued 145,188 137,144
Shares surrendered to AutoNation to satisfy tax withholding obligations in connection with the vesting of restricted stock 11,203 6,131