Shareholders' Equity (Restricted Stock Grants And Shares Surrendered To Satisfy Tax Withholdings) (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Stockholders' Equity Note [Abstract]
Shares issued	2,360	4,020	159,442	153,900
Shares surrendered to AutoNation to satisfy tax withholding obligations in connection with the vesting of restricted stock	500	1,788	36,427	46,265