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Accrued Expenses (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 29, 2012
Dec. 31, 2011
Accrued Expenses    
Compensation and related expenses $ 34,609 $ 53,438
Income taxes payable 825 2,602
Other 4,875 4,462
Total $ 40,309 $ 60,502