Property, Plant and Equipment, Net (Details) (USD $) In Thousands, unless otherwise specified	Jun. 28, 2014	Dec. 28, 2013
Property, Plant and Equipment [Line Items]
Land and improvements	$ 7,231	$ 7,231
Buildings and improvements	51,088	50,627
Machinery and equipment	163,424	149,040
Property, plant and equipment, gross	221,743	206,898
Accumulated depreciation	(138,363)	(132,413)
Property, plant and equipment, net	$ 83,380	$ 74,485