Property, Plant and Equipment (Property, Plant and Equipment) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 01, 2014	Aug. 31, 2013
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 149,670	$ 151,322
Less accumulated depreciation	(129,259)	(131,056)
Total property, plant and equipment, net	20,411	20,266
Land [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	707	757
Buildings and building improvements [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	47,067	50,297
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	92,954	91,224
Transportation [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment, gross	$ 8,942	$ 9,044