Consolidated Balance Sheets (Parentheticals) - $ / shares shares in Thousands	Dec. 26, 2020	Dec. 28, 2019
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, shares authorized (in shares)	1,000	1,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	60,000	60,000
Common stock, shares issued (in shares)	42,190	41,395
Common stock, shares outstanding (in shares)	42,190	41,395