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Significant Accounting Policies (Details 5) (USD $)
6 Months Ended
Jun. 29, 2014
Jun. 29, 2014
Measured on Recurring Basis
Level 1
Dec. 29, 2013
Measured on Recurring Basis
Level 1
Jun. 29, 2014
Measured on Recurring Basis
Level 2
Dec. 29, 2013
Measured on Recurring Basis
Level 2
Jun. 29, 2014
Measured on Recurring Basis
Carrying Value
Dec. 29, 2013
Measured on Recurring Basis
Carrying Value
Measurement of financial assets and liabilities at fair value on a recurring basis              
Cash surrender value of life insurance policies   $ 17,613,000 $ 16,798,000     $ 17,613,000 $ 16,798,000
Interest rate swap assets       41,000   41,000  
Interest rate swap liabilities       584,000 76,000 584,000 76,000
Transfers among levels within the fair value hierarchy $ 0