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Other Comprehensive Income (Details 1) (USD $)
In Thousands, unless otherwise specified
Sep. 29, 2012
Dec. 31, 2011
Accumulated other comprehensive income    
Foreign currency translation gain $ 50,182 $ 53,990
Changes in defined benefit plan liabilities (4,348) (4,468)
Unrealized holding gains on available-for-sale securities 290 1,431
Total accumulated other comprehensive income $ 46,124 $ 50,953