Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Jul. 01, 2012	Dec. 31, 2011
Condensed Consolidated Balance Sheets [Abstract]
Allowances for accounts receivable	$ 7,375	$ 6,950
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	2,000	2,000
Preferred stock, shares outstanding
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	1,300,000	1,300,000
Common stock, shares outstanding	557,065	561,767