Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details)

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Commitments and Contingencies (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Apr. 30, 2011
May 01, 2010
Commitments and contingencies (Textuals) [Abstract]    
Non-cancelable operating lease terms, minimum 3  
Non-cancelable operating lease terms, maximum 10  
Total rent expense under operating leases $ 21,857 $ 19,459