Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 24, 2011	Dec. 25, 2010
Consolidated Balance Sheets [Abstract]
Preferred stock - no par value
Preferred stock - shares authorized	10,000,000	10,000,000
Preferred stock - Series D ESOP, stated value	$ 0.01	$ 0.01
Preferred stock - shares outstanding	650,311	686,696
Common stock - par value	$ 2.5	$ 2.5
Common stock - shares authorized	200,000,000	200,000,000
Common stock - shares outstanding	86,089,903	85,057,710