Financial Statement Components - Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2017	Mar. 26, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period	$ (6,046)
Current period change	1,936	$ 987
End of period	(4,110)
Foreign Currency Translations [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period	(5,817)
Current period change	1,945
End of period	(3,872)
Defined Benefit Pension Plans [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period	(227)
End of period	(227)
Unrealized Income (Loss) on Investment [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of period	(2)
Current period change	(9)
End of period	$ (11)