Property, Plant and Equipment (Schedule of Property, Plant, and Equipment) (Details) - USD ($) $ in Thousands	Jan. 02, 2016	Dec. 27, 2014
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 636,191	$ 628,846
Accumulated depreciation	(425,613)	(401,023)
Property, plant and equipment, net	210,578	227,823
Land and land improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	9,194	10,585
Building and building improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	82,206	82,142
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	525,914	516,443
Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	8,696	8,570
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 10,181	$ 11,106