Stockholders' Equity (Details 2) (USD $)	3 Months Ended
	Mar. 31, 2012	Apr. 02, 2011
Stock option award activity under the Company's stock incentive plans
Outstanding as of December 31, 2011	1,886,925
Options, Granted	295,449	342,600
Options, Exercised	(479,112)
Options, Forfeited/Expired	(21,335)
Outstanding as of March 31, 2012	1,681,927
Options Exercisable as of March 31, 2012	1,009,827
Weighted Average Exercise Price, Outstanding as of December 31, 2011	$ 38.35
Weighted Average Exercise Price, Granted	$ 56.53
Weighted Average Exercise Price, Exercised	$ 27.39
Weighted Average Exercise Price, Forfeited/Expired	$ 49.63
Weighted Average Exercise Price, Outstanding as of March 31, 2012	$ 44.52
Weighted Average Exercise Price, Options Exercisable as of March 31, 2012	$ 38.82