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General (Details Textual) - USD ($)
3 Months Ended
Mar. 30, 2017
Mar. 31, 2016
Dec. 29, 2016
Summary of Significant Accounting Policies [Line Items]      
Depreciation $ 12,172,000 $ 10,191,000  
Percentage Of Cash Dividends 110.00%    
Available-for-sale Securities, Fair Value Disclosure $ 70,000   $ 93,000
Interest Rate Fair Value Hedge Asset at Fair Value 46,000   6,000
Trading Securities 1,980,000   $ 1,927,000
Increase (Decrease) In Restricted Cash $ (1,274,000) $ (2,073,000)