Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 29, 2012		Dec. 31, 2011
Preferred stock, shares authorized	100,000,000	[1]	100,000,000
Series A convertible preferred stock, shares authorized	10,896,250	[1]	10,896,250
Preferred stock, shares outstanding	0	[1]	0
Common stock, par value	$ 0.01	[1]	$ 0.01
Common stock, shares authorized	300,000,000	[1]	300,000,000
Common stock, shares issued	108,026,137	[1]	107,486,539
Common stock held in treasury, shares	11,128,883	[1]	6,799,597

[1] Unaudited.