Property, Plant, and Equipment (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 30, 2011
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 277,150,000	$ 270,756,000
Less accumulated depreciation	(147,036,000)	(129,548,000)
Property, plant and equipment, net	130,114,000	141,208,000
Property Plant and Equipment Income Statement Disclosures [Abstract]
Depreciation	19,900,000	18,600,000	19,100,000
Capitalized computer software, gross	6,700,000	9,600,000
Capitalized computer software, amortization	4,300,000	3,500,000	3,400,000
Land and Land Improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	22,868,000	23,324,000
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	57,555,000	61,410,000
Machinery and Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	192,779,000	181,081,000
Construction in Progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 3,948,000	$ 4,941,000