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Earnings Per Share - Additional Information (Detail) (Equity Option [Member])
3 Months Ended
May 02, 2015
Equity Option [Member]
 
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]  
Number of anti-dilutive securities 543,530us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_StockOptionMember