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Property, Plant, and Equipment Property, Plant, and Equipment (Details) - USD ($)
$ in Thousands
3 Months Ended
Nov. 24, 2018
Nov. 25, 2017
Aug. 25, 2018
Property, Plant and Equipment [Line Items]      
Property, plant, and equipment, gross $ 250,829   $ 239,257
Less accumulated depreciation 140,617   138,064
Property, plant, and equipment, net 110,212   101,193
Depreciation 3,169 $ 2,130  
Land [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant, and equipment, gross 6,747   6,747
Buildings and building improvements [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant, and equipment, gross 102,478   94,622
Machinery and equipment [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant, and equipment, gross 107,839   105,663
Software [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant, and equipment, gross 24,920   23,388
Transportation [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant, and equipment, gross $ 8,845   $ 8,837