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Derivative Financial Instruments (Tables) | 6 Months Ended
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Oct. 28, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Notional Amounts of Outstanding Derivative Positions | The foreign currency exchange contracts in aggregated notional amounts in place to exchange U.S. dollars at October 28, 2017 and April 29, 2017 were as follows:
| October 28, 2017 |  | April 29, 2017
| U.S. Dollars |  | Foreign Currency |  | U.S. Dollars |  | Foreign Currency
Foreign Currency Exchange Forward Contracts: |  |  |  |  |  |  |
U.S. Dollars/Australian Dollars | 3,993 |  |  | 5,219 |  |  | 7,984 |  |  | 10,669 |
U.S. Dollars/Canadian Dollars | 1,127 |  |  | 1,481 |  |  | 256 |  |  | 345 |
U.S. Dollars/British Pounds | (140 | ) |  | — |  |  | 4,936 |  |  | 3,959 |
U.S. Dollars/Singapore Dollars | — |  |  | — |  |  | 605 |  |  | 844 |
U.S. Dollars/Euros | 2,271 |  |  | 1,982 |  |  | 528 |  |  | 491 |
U.S. Dollars/Swiss Franc | 419 |  |  | 400 |  |  | — |  |  | — |

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- Definition Tabular disclosure of the notional amounts of outstanding derivative positions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959 + Details
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