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Employee Benefit Plans (Details 4) (USD $)
In Thousands, unless otherwise specified
Dec. 28, 2012
Dec. 30, 2011
Defined Benefit Plan, Assets for Plan Benefits $ 3,053 $ 3,058
Bonds and Loans [Member]
   
Defined Benefit Plan, Assets for Plan Benefits 2,259 2,186
Real estate (including real estate funds) [Member]
   
Defined Benefit Plan, Assets for Plan Benefits 684 765
Equity Securities [Member]
   
Defined Benefit Plan, Assets for Plan Benefits 76 73
Liquid Assets [Member]
   
Defined Benefit Plan, Assets for Plan Benefits $ 34 $ 34