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Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 30, 2014
Mar. 31, 2013
Statement of Other Comprehensive Income [Abstract]    
Amortization of pension plan actuarial losses, tax $ 110 $ 108
Change in realized and unrealized losses on derivative hedges, tax $ 0 $ 0