Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 29, 2013		Dec. 31, 2012
Preferred stock, shares authorized	100,000,000	[1]	100,000,000
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	107,976,955	[1]	107,863,310
Common stock held in treasury, shares	27,338,652	[1]	11,921,235
Series A convertible preferred stock
Preferred stock, shares authorized	10,896,250	[1]	10,896,250

[1] Unaudited.