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Restructuring and Excess Facilities (Details) (Excess Facilities [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 30, 2012
Excess Facilities [Member]
 
Activities in the restructuring accrual  
Balance at December 31, 2011 $ 2,593
Provisions 0
Cash payments (432)
Balance at March 30, 2012 $ 2,161