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Derivative Financial Instruments (Details) € in Thousands, £ in Thousands, SFr in Thousands, RM in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands | Oct. 27, 2018 USD ($) | Oct. 27, 2018 CAD ($) | Oct. 27, 2018 AUD ($) | Oct. 27, 2018 GBP (£) | Oct. 27, 2018 CHF (SFr) | Oct. 27, 2018 EUR (€) | Oct. 27, 2018 SGD ($) | Oct. 27, 2018 MYR (RM) | Apr. 28, 2018 USD ($) | Apr. 28, 2018 CAD ($) | Apr. 28, 2018 AUD ($) | Apr. 28, 2018 GBP (£) | Apr. 28, 2018 CHF (SFr) | Apr. 28, 2018 EUR (€) | Apr. 28, 2018 SGD ($) | Apr. 28, 2018 MYR (RM)
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U.S. Dollars/Australian Dollars | Not Designated as Hedging Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency exchange forward contracts | $ 3,857 |  | $ 5,304 |  |  |  |  |  | $ 1,081 |  | $ 1,400 |  |  |  |  |
U.S. Dollars/Canadian Dollars | Not Designated as Hedging Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency exchange forward contracts | 1,288 | $ 1,682 |  |  |  |  |  |  | 2,165 | $ 2,819 |  |  |  |  |  |
U.S. Dollars/British Pounds | Not Designated as Hedging Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency exchange forward contracts | 2,849 |  |  | £ 2,151 |  |  |  |  | 5,856 |  |  | £ 4,368 |  |  |  |
U.S. Dollars/Singapore Dollars | Not Designated as Hedging Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency exchange forward contracts | 0 |  |  |  |  |  | $ 0 |  | 236 |  |  |  |  |  | $ 312 |
U.S. Dollars/Euros | Not Designated as Hedging Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency exchange forward contracts | 0 |  |  |  |  | € 0 |  |  | (854) |  |  |  |  | € (708) |  |
U.S. Dollars/Swiss Franc | Not Designated as Hedging Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency exchange forward contracts | 0 |  |  |  | SFr 0 |  |  |  | 41 |  |  |  | SFr 40 |  |  |
U.S. Dollars/Malaysian Ringgit | Not Designated as Hedging Instrument |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency exchange forward contracts | 827 |  |  |  |  |  |  | RM 3,440 | 0 |  |  |  |  |  |  | RM 0
Estimate of Fair Value Measurement [Member] | Recurring Basis | Level 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives - currency forward contract, asset | 187 |  |  |  |  |  |  |  | 41 |  |  |  |  |  |  |
Derivatives - currency forward contracts, liability | $ (7) |  |  |  |  |  |  |  | $ (236) |  |  |  |  |  |  |

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