Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details Textual)

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Commitments and Contingencies (Details Textual) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jul. 28, 2012
Jul. 30, 2011
Jul. 28, 2012
Jul. 30, 2011
Commitments and Contingencies (Textual) [Abstract]        
Non-cancelable operating lease terms, minimum     3 years  
Non-cancelable operating lease terms, maximum     10 years  
Total rent expense under operating leases $ 27,640 $ 23,127 $ 53,708 $ 44,984