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Derivative Financial Instruments - (Details) € in Thousands, ¥ in Thousands, £ in Thousands, SGD in Thousands, SFr in Thousands, CAD in Thousands, AUD in Thousands, $ in Thousands	Apr. 30, 2016 USD ($)	Apr. 30, 2016 CAD	Apr. 30, 2016 AUD	Apr. 30, 2016 CHF (SFr)	Apr. 30, 2016 JPY (¥)	Apr. 30, 2016 EUR (€)	Apr. 30, 2016 SGD	Apr. 30, 2016 GBP (£)	May 02, 2015 USD ($)	May 02, 2015 CAD	May 02, 2015 AUD	May 02, 2015 CHF (SFr)	May 02, 2015 JPY (¥)	May 02, 2015 EUR (€)	May 02, 2015 SGD	May 02, 2015 GBP (£)
Recurring Basis
Derivative
Fair value of foreign currency exchange forward contracts	$ (453)								$ (283)
Recurring Basis | Level 2
Derivative
Fair value of foreign currency exchange forward contracts	(453)								(283)
U.S. Dollars/Australian Dollars | Not Designated as Hedging Instrument [Member]
Derivative
Foreign Currency Exchange Forward Contracts:	7,216		AUD 10,027						1,487		AUD 1,918
U.S. Dollars/Canadian Dollars | Not Designated as Hedging Instrument [Member]
Derivative
Foreign Currency Exchange Forward Contracts:	563	CAD 771							4,129	CAD 4,923
U.S. Dollars/British Pounds | Not Designated as Hedging Instrument [Member]
Derivative
Foreign Currency Exchange Forward Contracts:	1,795							£ 1,263	1,679							£ 1,123
U.S. Dollars/Singapore Dollars | Not Designated as Hedging Instrument [Member]
Derivative
Foreign Currency Exchange Forward Contracts:	261						SGD 356		1,176						SGD 1,601
U.S. Dollars/Euros | Not Designated as Hedging Instrument [Member]
Derivative
Foreign Currency Exchange Forward Contracts:	147					€ 132			(229)					€ 174
U.S. Dollars/Swiss Franc | Not Designated as Hedging Instrument [Member]
Derivative
Foreign Currency Exchange Forward Contracts:	0			SFr 0					5,662			SFr 5,500
U.S. Dollars/Japanese Yen | Not Designated as Hedging Instrument [Member]
Derivative
Foreign Currency Exchange Forward Contracts:	$ 0				¥ 0				$ 764				¥ 91,282

X

- Definition

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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- Definition

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+ References

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- Definition

Fair value portion of liability contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into.

+ References

No definition available.

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