Shareholders' Equity (Restricted Stock Grants And Shares Surrendered to Satisfy Tax Withholdings) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Stockholders' Equity Note [Abstract]
Shares issued	0	0	163,892	188,740
Shares surrendered to AutoNation to satisfy tax withholding obligations in connection with the vesting of restricted stock	11,688	12,796	42,985	33,485