CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 26, 2019	Dec. 27, 2018
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	242,853	2,839,079
Common Stock [Member]
Common Stock, par (in dollars per share)	$ 1	$ 1
Common Stock, authorized	50,000,000	50,000,000
Common Stock, issued	23,253,744	22,843,096
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	7,935,769	8,346,417
Common Stock, outstanding	7,935,769	8,346,417