Segment and Geographic Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 03, 2015 USD ($)	Sep. 27, 2014 USD ($)	Oct. 03, 2015 USD ($) segment	Sep. 27, 2014 USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of operating segments | segment			2
Total revenue	$ 109,715	$ 86,570	$ 304,772	$ 282,527
Total revenue as percentage	100.00%	100.00%	100.00%	100.00%
Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 86,443	$ 63,364	$ 232,372	$ 209,567
Total revenue as percentage	79.00%	73.00%	76.00%	74.00%
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 13,061	$ 14,909	$ 43,005	$ 45,337
Total revenue as percentage	12.00%	17.00%	14.00%	16.00%
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 10,211	$ 8,297	$ 29,395	$ 27,623
Total revenue as percentage	9.00%	10.00%	10.00%	10.00%
Qterics [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Percent	0.30%		0.30%
Net Loss, Percent	5.50%		2.40%
Assets, Percent	3.60%		3.60%