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Benefit Plans (Details 6) (Pension Plans [Member], USD $)
In Thousands, unless otherwise specified
Dec. 30, 2012
Pension Plans [Member]
 
Anticipated future pension benefit payments  
2013 $ 7,972
2014 8,400
2015 8,887
2016 9,371
2017 9,989
2018 - 2022 $ 61,009