Shareholders' Equity (Restricted Stock Grants And Shares Surrendered to Satisfy Tax Withholdings) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Stockholders' Equity Note [Abstract]
Shares issued	0	5,000	137,144	160,740
Shares surrendered to AutoNation to satisfy tax withholding obligations in connection with the vesting of restricted stock	516	43,459	42,822	80,394