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Business Combinations (Summary Of Purchase Price Allocation) (Details) - USD ($)
$ in Thousands
Sep. 02, 2017
Sep. 03, 2016
Aug. 29, 2015
Business Acquisition [Line Items]      
Goodwill $ 633,728 $ 624,081 $ 623,626
DECO Tool Supply Co. [Member]      
Business Acquisition [Line Items]      
Accounts receivable 15,452    
Inventories 4,802    
Prepaid expenses and other current assets 26    
Property, plant and equipment 6,609    
Goodwill 8,318    
Identifiable intangibles 12,870    
Total assets acquired 48,077    
Total liabilities assumed (5,732)    
Net assets acquired $ 42,345