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Property, Plant and Equipment (Property, Plant and Equipment) (Details) - USD ($)
$ in Thousands
Nov. 25, 2017
Aug. 26, 2017
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross $ 208,496 $ 204,534
Less accumulated depreciation (134,383) (132,974)
Total property, plant and equipment, net 74,113 71,560
Land [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 3,934 3,914
Buildings and building improvements [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 76,528 73,831
Machinery and equipment [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 100,065 99,952
Software [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross 19,352 17,844
Transportation [Member]    
Property, Plant and Equipment [Line Items]    
Total property, plant and equipment, gross $ 8,617 $ 8,993