Capital Assets (Property and Equipment) (Details) - USD ($) $ in Thousands	Jul. 01, 2017	Oct. 01, 2016
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 262,797	$ 251,621
Less: Accumulated depreciation	(161,714)	(150,832)
Total property and equipment, net	101,083	100,789
Land and improvements
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	2,866	2,865
Buildings and improvements
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	59,764	59,350
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	197,715	189,406
Assets held under capital leases
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 2,452	$ 0