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CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Dec. 27, 2018
Dec. 28, 2017
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 2,839,079 3,335,745
Common Stock [Member]    
Common Stock, par (in dollars per share) $ 1 $ 1
Common Stock, authorized 50,000,000 50,000,000
Common Stock, issued 22,843,096 22,655,517
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 8,346,417 8,533,996
Common Stock, outstanding 8,346,417 8,533,996