Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data	9 Months Ended	12 Months Ended
	Sep. 24, 2011	Dec. 25, 2010
Consolidated Balance Sheets
Common Stock, No Par Value
Common Stock, Shares Authorized	100,800,000	100,800,000
Common Stock, Shares, Issued	33,047,807	33,047,807
Deferred income taxes on available for sale securities unrealized gains (losses)	$ 3,503	$ 3,477
Treasury Stock, Shares	6,149,364	6,149,364