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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Apr. 01, 2012
Statement Of Partners Capital [Abstract]    
Net Income (Loss) $ 6,997 $ (5,934)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment (6,159) 7,874
Other Comprehensive Income (Loss), Pension Liability Adjustment 1,885 (891)
Comprehensive Income $ 2,723 $ 1,049