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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Feb. 29, 2016
Feb. 28, 2015
Feb. 29, 2016
Feb. 28, 2015
Income Taxes [Abstract]        
Provision for income taxes 28.00% 29.60% 28.30% 30.10%
Tax benefit $ 0.1      
Unrecognized tax benefits affected by the resolution of tax examinations or expiring statutes of limitation $ 0.4   $ 0.4