Segment Information - Long-lived assets (Details) (USD $) In Thousands, unless otherwise specified	Jan. 03, 2015		Dec. 28, 2013		Dec. 31, 2010
Segment Reporting Information [Line Items]
Long-lived assets	$ 151,478	[1]	$ 137,573	[1]	$ 72,326	[1]
United States And Canada [Member]
Segment Reporting Information [Line Items]
Long-lived assets					48,516	[1]
Asia [Member]
Segment Reporting Information [Line Items]
Long-lived assets					3,391	[1]
Europe And Middle East [Member]
Segment Reporting Information [Line Items]
Long-lived assets					19,198	[1]
Latin America [Member]
Segment Reporting Information [Line Items]
Long-lived assets					1,221	[1]
Total International [Member]
Segment Reporting Information [Line Items]
Long-lived assets	24,170	[1]	22,411	[1]	23,810	[1]
Asia [Member]
Segment Reporting Information [Line Items]
Long-lived assets	5,714		5,133
United States And Canada [Member]
Segment Reporting Information [Line Items]
Long-lived assets	127,308		115,162
Latin America [Member]
Segment Reporting Information [Line Items]
Long-lived assets	1,717		1,516
Europe And Middle East [Member]
Segment Reporting Information [Line Items]
Long-lived assets	$ 16,739		$ 15,762

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