Shareholders' Equity (Restricted Stock Grants And Shares Surrendered to Satisfy Tax Withholdings) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Stockholders' Equity Note [Abstract]
Shares issued	0	0	137,144	155,740
Shares surrendered to AutoNation to satisfy tax withholding obligations in connection with the vesting of restricted stock	36,175	28,303	42,306	36,935