Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 26, 2015		Dec. 27, 2014		Dec. 28, 2013
Allowance for Doubtful Accounts [Member]
Balance	$ 179		$ 330		$ 12
Additions (Reductions) Not Charged to Expense	1	[1]	(1)	[1]	353	[2]
Additions (Reductions) Charged (Credited) to Expense	19		(126)		172
Deductions/ Write-offs	128		24		207
Balance	71		179		330
Inventory Valuation Reserve [Member]
Balance	27,851		35,221		25,261
Additions (Reductions) Not Charged to Expense	(648)	[1]	(762)	[1]	7,398	[3]
Additions (Reductions) Charged (Credited) to Expense	2,409		2,624		7,068
Deductions/ Write-offs	2,959		9,232		4,506
Balance	$ 26,653		$ 27,851		$ 35,221

[1] Changes in reserve balances resulting from foreign currency impact.

[2] Includes $0.4 million resulting from Ismeca Acquisition on December 31, 2012 and foreign currency impact.

[3] Includes $6.8 million resulting from Ismeca Acquisition on December 31, 2012, foreign currency impact and reclass from other reserves.