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Fair Value Measurements (Details) (Fair Value, Measurements, Recurring [Member], USD $)
In Thousands
Oct. 02, 2011
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
 
Assets: 
Money market instruments$ 2,137
Municipal bonds0
Corporate bonds0
Agency bonds0
Sovereign bonds0
Covered bonds0
Currency forward contracts13
Liabilities: 
Currency forward contracts370
Significant Other Observable Inputs (Level 2) [Member]
 
Assets: 
Money market instruments0
Municipal bonds120,209
Corporate bonds125,329
Agency bonds45,170
Sovereign bonds12,971
Covered bonds6,318
Currency forward contracts0
Liabilities: 
Currency forward contracts$ 0