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Derivative Financial Instruments (Tables) | 9 Months Ended
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Jan. 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 January 28, 2017 and April 30, 2016 were as follows:
| January 28, 2017 |  | April 30, 2016
| U.S. Dollars |  | Foreign Currency |  | U.S. Dollars |  | Foreign Currency
Foreign Currency Exchange Forward Contracts: |  |  |  |  |  |  |
U.S. Dollars/Australian Dollars | 6,734 |  |  | 9,062 |  |  | 7,216 |  |  | 10,027 |
U.S. Dollars/Japanese Yen | 198 |  |  | 22,345 |  |  | — |  |  | — |
U.S. Dollars/Canadian Dollars | 557 |  |  | 740 |  |  | 563 |  |  | 771 |
U.S. Dollars/British Pounds | 4,836 |  |  | 3,866 |  |  | 1,795 |  |  | 1,263 |
U.S. Dollars/Singapore Dollars | 581 |  |  | 844 |  |  | 261 |  |  | 356 |
U.S. Dollars/Euros | 1,621 |  |  | 1,510 |  |  | 147 |  |  | 132 |

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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=64837297&loc=SL5579245-113959 + Details
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