Derivative Financial Instruments - (Details) In Thousands, unless otherwise specified	Apr. 26, 2014 Recurring Basis Level 2 USD ($)	Apr. 27, 2013 Recurring Basis Level 2 USD ($)	Apr. 26, 2014 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member] U.S. Dollars/Australian Dollars USD ($)	Apr. 26, 2014 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member] U.S. Dollars/Australian Dollars AUD	Apr. 27, 2013 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member] U.S. Dollars/Australian Dollars USD ($)	Apr. 27, 2013 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member] U.S. Dollars/Australian Dollars AUD	Apr. 26, 2014 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member] U.S. Dollars/Canadian Dollars USD ($)	Apr. 26, 2014 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member] U.S. Dollars/Canadian Dollars CAD	Apr. 27, 2013 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member] U.S. Dollars/Canadian Dollars USD ($)	Apr. 27, 2013 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member] U.S. Dollars/Canadian Dollars CAD	Apr. 26, 2014 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member] U.S. Dollars/British Pounds USD ($)	Apr. 26, 2014 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member] U.S. Dollars/British Pounds CAD	Apr. 27, 2013 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member] U.S. Dollars/British Pounds USD ($)	Apr. 27, 2013 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member] U.S. Dollars/British Pounds CAD	Apr. 26, 2014 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member] U.S. Dollars/Euros USD ($)	Apr. 26, 2014 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member] U.S. Dollars/Euros EUR (€)	Apr. 27, 2013 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member] U.S. Dollars/Euros USD ($)	Apr. 27, 2013 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member] U.S. Dollars/Euros EUR (€)	Apr. 26, 2014 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member] U.S. Dollars/Singapore Dollars USD ($)	Apr. 26, 2014 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member] U.S. Dollars/Singapore Dollars SGD	Apr. 27, 2013 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member] U.S. Dollars/Singapore Dollars USD ($)	Apr. 27, 2013 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member] U.S. Dollars/Singapore Dollars SGD	Apr. 26, 2014 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member] U.S. Dollars/Brazilian Reais USD ($)	Apr. 26, 2014 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member] U.S. Dollars/Brazilian Reais BRL	Apr. 27, 2013 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member] U.S. Dollars/Brazilian Reais USD ($)	Apr. 27, 2013 Foreign Exchange Forward [Member] Not Designated as Hedging Instrument [Member] U.S. Dollars/Brazilian Reais BRL
Derivative
Foreign Currency Exchange Forward Contracts:			$ 455	512	$ 2,944	2,873	$ 0	0	$ 492	492	$ 2,484	1,500	$ 1,554	1,005	$ 1,314	€ 973	$ 1,155	€ 866	$ 1,035	1,300	$ 0	0	$ 0	0	$ 0	0
Fair value of foreign currency exchange forward contracts	$ (85)	$ 7