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Property, Plant and Equipment (Property, Plant and Equipment) (Details) - USD ($)
$ in Thousands
Feb. 24, 2018
Aug. 26, 2017
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross $ 213,839 $ 204,534
Less accumulated depreciation (135,041) (132,974)
Total property, plant and equipment, net 78,798 71,560
Land [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 3,936 3,914
Buildings and building improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 81,367 73,831
Machinery and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 99,577 99,952
Software [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 20,601 17,844
Transportation [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross $ 8,358 $ 8,993