Derivatives (Table 1 & 2) (Details) (USD $) In Thousands, unless otherwise specified	Jul. 28, 2012
Canadian Dollar [Member]
Outstanding foreign exchange forward contracts
Notional Amount of outstanding foreign exchange forward contracts	$ 11,094	[1]
Notional Amount of outstanding foreign exchange forward contracts to hedge foreign currency denominated net monetary assets/liabilities	3,958	[1]
British Pound [Member]
Outstanding foreign exchange forward contracts
Notional Amount of outstanding foreign exchange forward contracts	65,003	[1]
Notional Amount of outstanding foreign exchange forward contracts to hedge foreign currency denominated net monetary assets/liabilities	6,259	[1]
Euro [Member]
Outstanding foreign exchange forward contracts
Notional Amount of outstanding foreign exchange forward contracts	127,060	[1]
Notional Amount of outstanding foreign exchange forward contracts to hedge foreign currency denominated net monetary assets/liabilities	9,820	[1]
Japanese Yen [Member]
Outstanding foreign exchange forward contracts
Notional Amount of outstanding foreign exchange forward contracts to hedge foreign currency denominated net monetary assets/liabilities	2,856	[1]
Swiss Franc [Member]
Outstanding foreign exchange forward contracts
Notional Amount of outstanding foreign exchange forward contracts to hedge foreign currency denominated net monetary assets/liabilities	$ 10,086	[1]

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