Property, Plant and Equipment (Property, Plant and Equipment) (Details) - USD ($) $ in Thousands	Aug. 26, 2017	Aug. 27, 2016
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 204,534	$ 185,858
Less accumulated depreciation	(132,974)	(129,927)
Total property, plant and equipment, net	71,560	55,931
Land [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	3,914	3,864
Building and building improvements [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	73,831	62,073
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	99,952	95,087
Software [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	17,844	15,878
Transportation [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 8,993	$ 8,956