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Leases - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Jan. 31, 2015
Feb. 01, 2014
Feb. 02, 2013
Leases [Abstract]      
Remaining term under operating leases, excluding renewals 11 years    
Rent expense under operating leases $ 16,161us-gaap_OperatingLeasesRentExpenseNet $ 10,467us-gaap_OperatingLeasesRentExpenseNet $ 7,448us-gaap_OperatingLeasesRentExpenseNet