Stockholders' Equity (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	Sep. 28, 2014
Stock option activity
Outstanding at period start (in shares)	5,724
Options, Exercised (in shares)	(2,071)
Options, Cancelled (in shares)	(35)
Outstanding at period end (in shares)	3,618
Weighted-Average Exercise Price, Outstanding at period start (in dollars per share)	$ 32.64
Weighted Average Exercise Price, Exercised (in dollars per share)	$ 30.72
Weighted Average Exercise Price, Cancelled (in dollars per share)	$ 31.74
Weighted-Average Exercise Price, Outstanding at period end (in dollars per share)	$ 33.74