Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 27, 2014	Dec. 31, 2013
Preferred stock, shares authorized	100,000,000	100,000,000
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	88,169,235	88,062,341
Common stock held in treasury, shares	8,920,774	7,311,037
Series A convertible preferred stock
Preferred stock, shares authorized	10,896,250	10,896,250