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Interest Income and Other (Expense) Income, Net (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Jan. 26, 2014
Oct. 27, 2013
Jul. 28, 2013
Apr. 28, 2013
Jan. 27, 2013
Oct. 28, 2012
Jul. 29, 2012
Apr. 29, 2012
Jan. 26, 2014
Jan. 27, 2013
Jan. 29, 2012
Interest Income and Other Expense Disclosure [Abstract]                      
Interest income                 $ 342 $ 404 $ 1,213
Non-recoverable VAT tax                 (598) (217) (156)
Foreign currency transaction loss                 (648) (354) (504)
Miscellaneous (expense) income                 (486) (810) 40
Interest income and other (expense) income, net $ (126) $ (259) $ (198) $ (807) $ (282) $ (1,071) $ 162 $ 214 $ (1,390) $ (977) $ 593