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Basis Of Presentation (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended
Basis Of Presentation (Narrative) (Details) $ in Thousands	Feb. 28, 2017 USD ($) country	Feb. 27, 2016 USD ($)	Feb. 28, 2017 USD ($) country item	Feb. 27, 2016 USD ($)
Basis Of Presentation [Abstract]
Number of areas of expertise \| item			7
Number of important distinguishing characteristics from competitors \| item			4
Number of countries in which entity operates \| country	150		150
Fair value of other long-term liabilities \| $	$ 0		$ 0
Increase (decrease) in business combination contingent consideration liability \| $	$ (900)	$ 1,200	$ (1,900)	$ 1,600