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Restructuring Reserve Rollforward (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 28, 2013
Sep. 29, 2012
Summary of components of accrued liability with respect to Company's business restructuring activities    
Beginning balance $ 6,278 $ 1,100
Additions 1,746 11,811
Cash payments (6,386) (9,210)
Adjustments (71) (33)
Ending balance $ 1,567 $ 3,668