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Derivative Financial Instruments - (Details) € in Thousands, SGD in Thousands, CAD in Thousands, AUD in Thousands, $ in Thousands | May. 02, 2015 USD ($) | May. 02, 2015 CAD | May. 02, 2015 EUR (€) | May. 02, 2015 AUD | May. 02, 2015 SGD | Apr. 26, 2014 USD ($) | Apr. 26, 2014 CAD | Apr. 26, 2014 EUR (€) | Apr. 26, 2014 AUD | Apr. 26, 2014 SGD
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Recurring Basis | Level 2 |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |
Fair value of foreign currency exchange forward contracts | $ (283) |  |  |  |  | $ (85) |  |  |  |
Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member] | U.S. Dollars/Australian Dollars |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |
Foreign Currency Exchange Forward Contracts: | 1,487 |  |  | AUD 1,918 |  | 455 |  |  | AUD 512 |
Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member] | U.S. Dollars/Canadian Dollars |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |
Foreign Currency Exchange Forward Contracts: | 4,129 | CAD 4,923 |  |  |  | 0 | CAD 0 |  |  |
Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member] | U.S. Dollars/British Pounds |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |
Foreign Currency Exchange Forward Contracts: | 1,679 | CAD 1,123 |  |  |  | 2,484 | CAD 1,500 |  |  |
Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member] | U.S. Dollars/Singapore |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |
Foreign Currency Exchange Forward Contracts: | 1,176 |  |  |  | SGD 1,601 | 1,035 |  |  |  | SGD 1,300
Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member] | U.S. Dollars/Euros |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |
Foreign Currency Exchange Forward Contracts: | (229) |  | € 174 |  |  | 1,314 |  | € 973 |  |
Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member] | U.S. Dollars/Swiss Franc |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |
Foreign Currency Exchange Forward Contracts: | 5,662 |  | 5,500 |  |  | 0 |  | 0 |  |
Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member] | U.S. Dollars/Japanese Yen |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |
Foreign Currency Exchange Forward Contracts: | $ 764 |  | € 91,282 |  |  | $ 0 |  | € 0 |  |

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