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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Jun. 29, 2017
Dec. 29, 2016
Accounts and notes receivable, reserves $ 220 $ 204
Preferred Stock, par (in dollars per share) $ 1 $ 1
Preferred Stock, authorized 1,000,000 1,000,000
Preferred Stock, issued 0 0
Cost of Common Stock in treasury, shares 3,379,849 3,517,951
Common Stock [Member]    
Common Stock, par (in dollars per share) $ 1 $ 1
Common Stock, authorized 50,000,000 50,000,000
Common Stock, issued 22,593,212 22,489,976
Class B Common Stock [Member]    
Common Stock, par (in dollars per share) $ 1 $ 1
Common Stock, authorized 33,000,000 33,000,000
Common Stock, issued 8,596,301 8,699,540
Common Stock, outstanding 8,596,301 8,699,540