Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 25, 2010
Consolidated Balance Sheets [Abstract]
Allowance for doubtful accounts and customer credits	$ 53,311	$ 46,726
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	25,000,000	25,000,000
Common stock, shares issued	18,078,261	17,887,344
Common stock, shares outstanding	18,078,261	17,887,344