Property, Plant and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2016	Sep. 27, 2015	Sep. 25, 2016	Dec. 27, 2015
Property, Plant and Equipment [Line Items]
Deferred Revenue, Revenue Recognized	$ 6,200	$ 1,300
Property, plant and equipment, gross	587,437		$ 587,437	$ 585,074
Accumulated depreciation	(359,851)		(359,851)	(350,428)
Property, plant and equipment, net	227,586		227,586	234,646
Depreciation expense		$ 25,700	25,900
Land and buildings [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	68,317		68,317	73,803
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	483,724		483,724	486,612
Leasehold improvements and others [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	4,618		4,618	4,204
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 30,778		$ 30,778	$ 20,455