Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Jan. 01, 2011
Consolidated Balance Sheets [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 2,532	$ 2,587
Common stock, par value	$ 0.1167	$ 0.1167
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	37,634,403	36,909,317
Common stock, shares outstanding	37,634,403	36,909,317