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Significant Accounting Policies (Details 5) (USD $)
9 Months Ended
Sep. 28, 2014
Sep. 28, 2014
Measured on Recurring Basis
Level 1
Dec. 29, 2013
Measured on Recurring Basis
Level 1
Sep. 28, 2014
Measured on Recurring Basis
Level 2
Dec. 29, 2013
Measured on Recurring Basis
Level 2
Sep. 28, 2014
Measured on Recurring Basis
Carrying Value
Dec. 29, 2013
Measured on Recurring Basis
Carrying Value
Deferred Income Tax Accounts and Tax Reserves              
Net deferred tax liability $ 5,700,000            
Measurement of financial assets and liabilities at fair value on a recurring basis              
Cash surrender value of life insurance policies   17,814,000 16,798,000     17,814,000 16,798,000
Interest rate swap assets       218,000   218,000  
Interest rate swap liabilities       75,000 76,000 75,000 76,000
Transfers among levels within the fair value hierarchy $ 0