Property, Plant and Equipment (Details) (USD $)	12 Months Ended
	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Property, Plant and Equipment [Abstract]
Land	$ 13,461,000	$ 14,487,000
Buildings	39,674,000	40,090,000
Machinery and equipment	120,945,000	107,983,000
Construction in process	3,934,000	7,725,000
Property, plant and equipment, gross	178,014,000	170,285,000
Less accumulated depreciation	84,114,000	69,340,000
Property, plant and equipment, net	93,900,000	100,945,000
Depreciation	17,100,000	17,000,000	23,200,000
Construction in Progress Expenditures Incurred but Not yet Paid	$ 700,000	$ 600,000