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Debt - Additional Information (Detail) - Line of Credit [Member] - Credit Agreement [Member] - USD ($)
$ in Millions
Jul. 15, 2015
Oct. 28, 2017
Jan. 28, 2017
Debt Instrument [Line Items]      
Maximum borrowing capacity $ 125.0    
Available borrowings   $ 125.0 $ 125.0
Base Rate, Federal Funds Rate [Member]      
Debt Instrument [Line Items]      
Basis spread on variable rate 0.50%    
Base Rate, LIBOR [Member]      
Debt Instrument [Line Items]      
Basis spread on variable rate 1.00%    
Minimum [Member] | Alternate Base Rate [Member]      
Debt Instrument [Line Items]      
Basis spread on variable rate 0.00%    
Minimum [Member] | Adjusted LIBOR [Member]      
Debt Instrument [Line Items]      
Basis spread on variable rate 1.00%    
Maximum [Member] | Alternate Base Rate [Member]      
Debt Instrument [Line Items]      
Basis spread on variable rate 0.70%    
Maximum [Member] | Adjusted LIBOR [Member]      
Debt Instrument [Line Items]      
Basis spread on variable rate 1.70%