Financial Statement Components - Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 26, 2016	Mar. 28, 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period	$ (5,202)
Current period change	987	$ (1,698)
End of period	(4,215)
Foreign Currency Translations [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period	(4,948)
Current period change	952
End of period	(3,996)
Defined Benefit Pension Plans [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period	(210)
End of period	(210)
Unrealized Income (Loss) on Investment [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period	(44)
Current period change	35
End of period	$ (9)