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Significant Accounting Policies (Detail) - Accounting Standards Update 2015-17 [Member] - USD ($)
May. 03, 2015
Feb. 01, 2015
Summary Of Significant Accounting Policies [Line Items]    
Increased noncurrent deferred income taxes $ 4,700,000 $ 4,500,000
Decreased noncurrent deferred tax liabilities $ (68,000) $ (2,500,000)