Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 30, 2011	Dec. 31, 2010
Consolidated Balance Sheets [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 6,689	$ 3,442
Accounts receivable, sales return reserve	$ 1,767	$ 1,632
Preferred stock, no par value	$ 0	$ 0
Preferred stock, shares authorized	3,000	3,000
Preferred stock, shares outstanding	0	0
Common stock, no par value	$ 0	$ 0
Common stock, shares authorized	180,000	180,000
Common stock, shares issued	123,663	120,939
Common stock, shares outstanding	123,663	120,939