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Derivative Financial Instruments (Details 4)
 3 Months Ended 9 Months Ended
Oct. 27, 2012
Other income/expense
USD ($)
Oct. 29, 2011
Other income/expense
USD ($)
Oct. 27, 2012
Other income/expense
USD ($)
Oct. 29, 2011
Other income/expense
USD ($)
Oct. 27, 2012
Derivatives not designated as hedging instruments:
Euro
USD ($)
Jan. 28, 2012
Derivatives not designated as hedging instruments:
Euro
USD ($)
Oct. 27, 2012
Derivatives not designated as hedging instruments:
Canadian dollar
USD ($)
Jan. 28, 2012
Derivatives not designated as hedging instruments:
Canadian dollar
USD ($)
Jan. 28, 2012
Derivatives not designated as hedging instruments:
Swiss franc
USD ($)
Oct. 27, 2012
Derivatives not designated as hedging instruments:
Sale of GBP to purchase euros
GBP (£)
Jan. 28, 2012
Derivatives not designated as hedging instruments:
Sale of GBP to purchase euros
GBP (£)
Forward contracts not designated as cash flow hedges                      
Notional amount of foreign exchange currency sales contracts         $ 59,600,000 $ 88,000,000 $ 42,500,000 $ 50,500,000 $ 14,000,000    
Notional amount of foreign exchange currency contracts                   3,100,000 5,000,000
Foreign currency forward contracts, maximum remaining maturity period         6 months   8 months     3 months  
Gain/(loss) on foreign exchange currency contracts recognized in other income/expense (before taxes) (3,359,000) 6,401,000 2,861,000 (6,005,000)              
Derivatives not designated as hedging instruments                      
Gain/(loss) on interest rate swaps recognized in other income/expense (before taxes) $ 37,000 $ (89,000) $ 42,000 $ (89,000)