Capital Assets (Property and Equipment) (Details) - USD ($) $ in Thousands	Apr. 01, 2017	Oct. 01, 2016
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 257,364	$ 251,621
Less accumulated depreciation	(158,233)	(150,832)
Property and equipment, net	99,131	100,789
Land and improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,863	2,865
Building and improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	59,329	59,350
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 195,172	$ 189,406