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Derivatives and Hedging Activities - Summary of Open Foreign Currency Contracts (Details)
$ in Thousands, $ in Thousands
Jul. 29, 2018
USD ($)
Jul. 29, 2018
CAD ($)
Derivative [Line Items]    
Number of Instruments 6 6
Sell USD/Buy CAD Forward Contract [Member]    
Derivative [Line Items]    
Number of Instruments 6 6
Short [Member] | Sell USD/Buy CAD Forward Contract [Member]    
Derivative [Line Items]    
Notional Value $ 8,560  
Long [Member] | Sell USD/Buy CAD Forward Contract [Member]    
Derivative [Line Items]    
Notional Value   $ 11,000