Derivatives (Table 1 & 2) (Details) (USD $) In Thousands, unless otherwise specified	Apr. 28, 2012
Canadian Dollar [Member]
Outstanding foreign exchange forward contracts
Notional Amount of outstanding foreign exchange forward contracts	$ 15,927	[1]
Notional Amount of outstanding foreign exchange forward contracts to hedge foreign currency denominated net monetary assets/liabilities	9,061
British Pound [Member]
Outstanding foreign exchange forward contracts
Notional Amount of outstanding foreign exchange forward contracts	47,077	[1]
Notional Amount of outstanding foreign exchange forward contracts to hedge foreign currency denominated net monetary assets/liabilities	7,980
Euro [Member]
Outstanding foreign exchange forward contracts
Notional Amount of outstanding foreign exchange forward contracts	151,838	[1]
Notional Amount of outstanding foreign exchange forward contracts to hedge foreign currency denominated net monetary assets/liabilities	13,191
Japanese Yen [Member]
Outstanding foreign exchange forward contracts
Notional Amount of outstanding foreign exchange forward contracts	0	[1]
Notional Amount of outstanding foreign exchange forward contracts to hedge foreign currency denominated net monetary assets/liabilities	$ 19,559

[1] Amounts are reported in thousands and in U.S. Dollars equivalent as of April 28, 2012.