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Business And Summary Of Significant Accounting Policies (Components Of Other Intangible Assets) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Sep. 02, 2017 | Sep. 03, 2016
Intangible Assets By Major Class [Line Items] |  |
Gross Carrying Amount, Total | $ 228,968 | $ 216,005
Accumulated Amortization | (118,539) | (110,698)
Customer Relationships [Member] |  |
Intangible Assets By Major Class [Line Items] |  |
Gross Carrying Amount | 187,260 | 175,160
Accumulated Amortization | $ (92,381) | (85,316)
Customer Relationships [Member] | Minimum [Member] |  |
Intangible Assets By Major Class [Line Items] |  |
Weighted Average Useful Life (in years) | 5 years |
Customer Relationships [Member] | Maximum [Member] |  |
Intangible Assets By Major Class [Line Items] |  |
Weighted Average Useful Life (in years) | 18 years |
Contract Rights [Member] |  |
Intangible Assets By Major Class [Line Items] |  |
Weighted Average Useful Life (in years) | 10 years |
Gross Carrying Amount | $ 23,100 | 23,100
Accumulated Amortization | (23,100) | (23,100)
Trademark [Member] |  |
Intangible Assets By Major Class [Line Items] |  |
Gross Carrying Amount | 4,403 | 3,613
Accumulated Amortization | $ (3,058) | (2,282)
Trademark [Member] | Minimum [Member] |  |
Intangible Assets By Major Class [Line Items] |  |
Weighted Average Useful Life (in years) | 1 year |
Trademark [Member] | Maximum [Member] |  |
Intangible Assets By Major Class [Line Items] |  |
Weighted Average Useful Life (in years) | 5 years |
Trademarks [Member] |  |
Intangible Assets By Major Class [Line Items] |  |
Gross Carrying Amount, Indefinite | $ 14,205 | $ 14,132

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