Property, Plant and Equipment (Schedule of Property, Plant and Equipment) (Details) - USD ($) $ in Thousands	Oct. 01, 2016	Jan. 02, 2016
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 649,587	$ 636,191
Accumulated depreciation	(440,877)	(425,613)
Property, plant and equipment, net	208,710	210,578
Land and land improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	8,537	9,194
Building and building improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	79,443	82,206
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	536,224	525,914
Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	9,463	8,696
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 15,920	$ 10,181