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Property, Plant and Equipment (Property, Plant and Equipment) (Details) - USD ($)
$ in Thousands
May 26, 2018
Aug. 26, 2017
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross $ 219,573 $ 204,534
Less accumulated depreciation (137,092) (132,974)
Total property, plant and equipment, net 82,481 71,560
Land [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 4,647 3,914
Buildings and building improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 82,780 73,831
Machinery and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 101,525 99,952
Software [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 22,078 17,844
Transportation [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross $ 8,543 $ 8,993