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Revenue (Schedule Of Disaggregation Of Revenue) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Nov. 27, 2021 | Nov. 28, 2020
Disaggregation of Revenue [Line Items] |  |
Net sales | $ 848,547 | $ 771,904
Net Sales [Member] | Customer Concentration Risk [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Concentration risk, percentage | 100.00% | 100.00%
Net Sales [Member] | Geographic Concentration Risk [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | $ 848,547 | $ 771,904
Concentration risk, percentage | 100.00% | 100.00%
Manufacturing Heavy [Member] | Net Sales [Member] | Customer Concentration Risk [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Concentration risk, percentage | 48.00% | 45.00%
Manufacturing Light [Member] | Net Sales [Member] | Customer Concentration Risk [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Concentration risk, percentage | 20.00% | 20.00%
Retail/Wholesale [Member] | Net Sales [Member] | Customer Concentration Risk [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Concentration risk, percentage | 8.00% | 7.00%
Government [Member] | Net Sales [Member] | Customer Concentration Risk [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Concentration risk, percentage | 7.00% | 11.00%
Commercial Services [Member] | Net Sales [Member] | Customer Concentration Risk [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Concentration risk, percentage | 4.00% | 4.00%
Other Customers [Member] | Net Sales [Member] | Customer Concentration Risk [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Concentration risk, percentage | 13.00% | 13.00%
United States [Member] | Net Sales [Member] | Geographic Concentration Risk [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | $ 799,075 | $ 726,893
Concentration risk, percentage | 94.00% | 94.00%
Mexico [Member] | Net Sales [Member] | Geographic Concentration Risk [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | $ 22,615 | $ 20,365
Concentration risk, percentage | 3.00% | 3.00%
United Kingdom [Member] | Net Sales [Member] | Geographic Concentration Risk [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | $ 14,595 | $ 12,991
Concentration risk, percentage | 2.00% | 2.00%
Canada [Member] | Net Sales [Member] | Geographic Concentration Risk [Member] |  |
Disaggregation of Revenue [Line Items] |  |
Net sales | $ 12,262 | $ 11,655
Concentration risk, percentage | 1.00% | 1.00%

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