Consolidated Balance Sheets (Parenthetical) (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	Apr. 01, 2012	Jan. 01, 2012	Apr. 03, 2011
Allowance for doubtful accounts	$ 1,523	$ 1,521	$ 1,442
Common Stock
Common stock, par value	$ 1.00	$ 1.00	$ 1.00
Common stock, shares authorized	30,000,000	30,000,000	30,000,000
Common stock, shares issued	10,203,821	10,203,821	10,203,821
Treasury stock, shares	3,062,374	3,062,374	3,062,374
Class B Common Stock
Common stock, par value	$ 1.00	$ 1.00	$ 1.00
Common stock, shares authorized	10,000,000	10,000,000	10,000,000
Common stock, shares issued	2,716,956	2,694,636	2,694,636
Treasury stock, shares	628,114	628,114	628,114