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Other Comprehensive Income (Details 1) (USD $)
In Thousands, unless otherwise specified
Jun. 28, 2014
Dec. 28, 2013
Accumulated other comprehensive income    
Foreign currency translation gain $ 34,011 $ 27,183
Changes in defined benefit plan liabilities (2,831) (3,218)
Unrealized holding gains on available-for-sale securities 941 346
Total accumulated other comprehensive income $ 32,121 $ 24,311