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Derivatives and Hedging Activities - Summary of Open Foreign Currency Contracts (Details) $ in Thousands, $ in Thousands | Apr. 29, 2018 CAD ($) | Apr. 29, 2018 USD ($)
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Derivative [Line Items] |  |
Number of Instruments | 9 | 9
Sell USD/Buy CAD Forward Contract [Member] |  |
Derivative [Line Items] |  |
Number of Instruments | 9 | 9
Short [Member] | Sell USD/Buy CAD Forward Contract [Member] |  |
Derivative [Line Items] |  |
Notional Value |  | $ 12,829
Long [Member] | Sell USD/Buy CAD Forward Contract [Member] |  |
Derivative [Line Items] |  |
Notional Value | $ 16,500 |

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