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Derivatives and Hedging Activities - Summary of Outstanding Foreign Currency Contracts (Details) £ in Thousands, $ in Thousands | Jan. 27, 2019 USD ($) instrument | Jan. 27, 2019 GBP (£) instrument
--- | --- | ---
Derivative [Line Items] |  |
Number of Instruments | 6 | 6
Sell USD/Buy GBP Forward Contract |  |
Derivative [Line Items] |  |
Number of Instruments | 6 | 6
Sell USD/Buy GBP Forward Contract | Sell |  |
Derivative [Line Items] |  |
Derivative Asset, Notional Amount | $ | $ 3,910 |
Sell USD/Buy GBP Forward Contract | Buy |  |
Derivative [Line Items] |  |
Derivative Asset, Notional Amount | £ |  | £ 3,000

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