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Consolidated Statements Of Comprehensive Income (Loss) Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 29, 2013
Sep. 23, 2012
Sep. 29, 2013
Sep. 23, 2012
Statement of Other Comprehensive Income [Abstract]        
Amortization of pension plan actuarial losses, tax $ 122 $ 0 $ 343 $ 0
Change in realized and unrealized losses on derivative hedges, tax $ 139 $ 42 $ 139 $ 37