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Property, Plant and Equipment and Assets Held for Sale Property, Plant, and Equipment (Narrative) (Details) - USD ($)
3 Months Ended 12 Months Ended
May. 30, 2015
Mar. 01, 2014
Aug. 29, 2015
Aug. 30, 2014
Aug. 31, 2013
Property, Plant and Equipment [Line Items]          
Purchases of property and equipment     $ 16,573,000 $ 10,476,000 $ 4,422,000
Proceeds from sale   $ 2,300,000      
Gain on sale   $ (629,000)      
Middlebury, IN [Member]          
Property, Plant and Equipment [Line Items]          
Purchases of property and equipment $ 5,400,000        
Waverly, IA [Member]          
Property, Plant and Equipment [Line Items]          
Purchases of property and equipment $ 850,000