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Derivatives and Hedging Activities - Summary of Open Foreign Currency Contracts (Details) £ in Thousands, $ in Thousands, $ in Thousands | Jul. 26, 2020 USD ($) instrument | Jul. 26, 2020 CAD ($) instrument | Jul. 26, 2020 GBP (£) instrument | Jan. 26, 2020 USD ($) instrument | Jan. 26, 2020 CAD ($) instrument | Jan. 26, 2020 GBP (£) instrument
--- | --- | --- | --- | --- | --- | ---
Derivative [Line Items] |  |  |  |  |  |
Number of instruments | instrument | 12 | 12 | 12 | 0 | 0 | 0
Sell USD/Buy CAD Forward Contract |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Number of instruments | instrument | 6 | 6 | 6 | 0 | 0 | 0
Sell USD/Buy GBP Forward Contract |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Number of instruments | instrument | 6 | 6 | 6 | 0 | 0 | 0
Sell Notional Value | Sell USD/Buy CAD Forward Contract |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notional value | $ | $ 8,571 |  |  | $ 0 |  |
Sell Notional Value | Sell USD/Buy GBP Forward Contract |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notional value | $ | $ 4,508 |  |  | $ 0 |  |
Buy Notional Value | Sell USD/Buy CAD Forward Contract |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notional value | $ |  | $ 12,000 |  |  | $ 0 |
Buy Notional Value | Sell USD/Buy GBP Forward Contract |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Notional value | £ |  |  | £ 3,600 |  |  | £ 0

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