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Derivative Financial Instruments (Details) In Thousands, unless otherwise specified	Jul. 27, 2013 Recurring Basis Level 2 USD ($)	Apr. 27, 2013 Recurring Basis Level 2 USD ($)	Jul. 27, 2013 U.S. Dollars/Australian Dollars USD ($)	Jul. 27, 2013 U.S. Dollars/Australian Dollars AUD	Apr. 27, 2013 U.S. Dollars/Australian Dollars USD ($)	Apr. 27, 2013 U.S. Dollars/Australian Dollars AUD	Jul. 27, 2013 U.S. Dollars/Canadian Dollars USD ($)	Jul. 27, 2013 U.S. Dollars/Canadian Dollars CAD	Apr. 27, 2013 U.S. Dollars/Canadian Dollars USD ($)	Apr. 27, 2013 U.S. Dollars/Canadian Dollars CAD	Jul. 27, 2013 U.S. Dollars/British Pounds USD ($)	Jul. 27, 2013 U.S. Dollars/British Pounds GBP (£)	Apr. 27, 2013 U.S. Dollars/British Pounds USD ($)	Apr. 27, 2013 U.S. Dollars/British Pounds GBP (£)	Jul. 27, 2013 U.S. Dollars/Euros USD ($)	Jul. 27, 2013 U.S. Dollars/Euros EUR (€)	Apr. 27, 2013 U.S. Dollars/Euros USD ($)	Apr. 27, 2013 U.S. Dollars/Euros EUR (€)
Derivative
Foreign Currency Exchange Forward Contracts:			$ 4,307	4,653	$ 2,944	2,873	$ 0	0	$ 492	492	$ 694	£ 447	$ 1,554	£ 1,005	$ 756	€ 574	$ 153	€ 114
Fair value of foreign currency exchange forward contracts	$ 59	$ 7

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents contracts related to the exchange of different currencies, including foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into and existing as of the balance sheet date.

+ References

No definition available.

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- Definition

Aggregate notional amount of all foreign currency derivatives not designated as hedging instruments. Notional amount refers to the number of currency units specified in the foreign currency derivative contract.

+ 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=7476318&loc=SL5579245-113959



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Notional Amount

-URI http://asc.fasb.org/extlink&oid=6519104



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 1B

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5580258-113959

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