Reporting Segment And Geographic Information (Schedule Of Long-Lived Assets) (Details) (USD $) In Thousands, unless otherwise specified	Jan. 02, 2015	Jan. 03, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, Net	$ 157,355	$ 142,975
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, Net	124,491	112,034
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, Net	21,195	20,159
Asia Pacific And Other Non-US Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, Net	$ 11,669	$ 10,782