CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 28, 2017	Dec. 29, 2016
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	3,335,745	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	22,655,517	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	8,533,996	8,699,540
Common Stock, outstanding	8,533,996	8,699,540