Segment Information Long-lived Assets by Region (Details) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 25, 2015
Geographic Information And Concentration Of Risk [Line Items]
Long-lived assets	$ 101,005	$ 115,471
United States
Geographic Information And Concentration Of Risk [Line Items]
Long-lived assets	56,212	63,449
Rest of North America [Member]
Geographic Information And Concentration Of Risk [Line Items]
Long-lived assets	21,618	25,139
Europe
Geographic Information And Concentration Of Risk [Line Items]
Long-lived assets	7,109	9,119
Asia and All Others
Geographic Information And Concentration Of Risk [Line Items]
Long-lived assets	$ 16,066	$ 17,764