Derivatives (Details) (USD $) In Thousands	Jul. 30, 2011
Canadian Dollar [Member]
Outstanding foreign exchange forward contracts
Notional Amount of outstanding foreign exchange forward contracts	$ 15,998
British Pound [Member]
Outstanding foreign exchange forward contracts
Notional Amount of outstanding foreign exchange forward contracts	42,984
Euro [Member]
Outstanding foreign exchange forward contracts
Notional Amount of outstanding foreign exchange forward contracts	48,614
Notional Amount of outstanding foreign exchange forward contracts to hedge foreign currency denominated net monetary assets/liabilities	8,586
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	$ 7,449