Significant Accounting Policies (Reconciliation Of The Average Number Of Common Shares Outstanding To Average Number Of Diluted Shares Outstanding) (Details)	12 Months Ended
	Dec. 31, 2011	Dec. 25, 2010	Dec. 26, 2009
Significant Accounting Policies [Abstract]
Average number of common shares outstanding	47,444,000	49,523,000	51,095,000
Incremental shares from assumed exercises of stock options	80,000	57,000	185,000
Average number of common shares and common share equivalents outstanding	47,524,000	49,580,000	51,280,000