Property, Plant, and Equipment, Net (Details) (USD $) In Thousands, unless otherwise specified	Dec. 27, 2014	Dec. 28, 2013
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 738,113	$ 732,180
Less accumulated depreciation	(492,203)	(487,723)
Property, plant and equipment, net	245,910	244,457
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	12,198	13,153
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	120,035	132,331
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	561,093	561,005
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 44,787	$ 25,691