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Fair Value Measurements (Details 2) (USD $) In Thousands	Oct. 29, 2011
Quoted Prices in Active Markets for Identical Assets or Liabilities Level 1
ASSETS
Money market funds	$ 139,576
Derivative assets	0
LIABILITIES
Derivative liabilities	0
Significant Other Observable Inputs Level 2
ASSETS
Money market funds	0
Derivative assets	8,125
LIABILITIES
Derivative liabilities	(21,505)
Unobservable Inputs Level 3
ASSETS
Money market funds	0
Derivative assets	0
LIABILITIES
Derivative liabilities	$ 0

Fair values as of the balance sheet date of all assets resulting from contracts that meet the criteria of being accounted for as derivative instruments, net of the effects of master netting arrangements.

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