Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands	Oct. 02, 2011	Dec. 26, 2010
Consolidated Balance Sheets
Property and equipment, accumulated depreciation	$ 404,063	$ 379,580
Common stock, no par value
Common stock, shares authorized	50,000	50,000
Common stock, shares issued	21,969	21,713
Common stock, shares outstanding	21,969	21,713