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Other Comprehensive Income (Loss) (Details 2) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Jan. 01, 2011
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]    
Foreign currency translation gain $ 53,990 $ 51,259
Changes in defined benefit plan liabilities (4,468) (4,774)
Unrealized holding gains on available-for-sale securities 1,431 6,571
Accumulated other comprehensive income $ 50,953 $ 53,056