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Related Party Transactions (Details) (USD $)
In Millions, unless otherwise specified
6 Months Ended
Jul. 30, 2011
Marciano Trusts
Jul. 31, 2010
Marciano Trusts
Jul. 30, 2011
MPM Financial
Jul. 31, 2010
MPM Financial
Disclosure of related party transactions        
Number of leases under lease agreement 4      
Number of leases amended 1      
Increase in the annual lease rent amount $ 0.1      
Increased annual lease rent amount 1.1      
Lease rent expense and property tax 2.4 2.3    
Fees paid for aircraft facility     $ 0.5 $ 0.4