Shareholders' Equity (Restricted Stock Grants And Shares Surrendered to Satisfy Tax Withholdings) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Stockholders' Equity Note [Abstract]
Shares issued	0	0	155,740	163,892
Shares surrendered to AutoNation to satisfy tax withholding obligations in connection with the vesting of restricted stock	28,303	23,008	36,935	31,297