Financial Statement Components - Components of Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 28, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning of period	$ (2,769)
Current period change	(1,698)
End of period	(4,467)
Foreign Currency Translations [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning of period	(2,604)
Current period change	(1,727)
End of period	(4,331)
Defined Benefit Pension Plans [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning of period	(134)
Current period change	0
End of period	(134)
Unrealized Income (Loss) on Investment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning of period	(31)
Current period change	29
End of period	$ (2)