Property, Plant and Equipment (Property, Plant and Equipment) (Details) - USD ($) $ in Thousands	Aug. 25, 2018	Aug. 26, 2017
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 239,257	$ 204,534
Less accumulated depreciation	(138,064)	(132,974)
Total property, plant and equipment, net	101,193	71,560
Land [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	6,747	3,914
Building and building improvements [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	94,622	73,831
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	105,663	99,952
Software [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	23,388	17,844
Transportation [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 8,837	$ 8,993