Stock Plans (Weighted-Average Assumptions Used in the Black-Scholes Option Pricing Model) (Details)	6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Risk-free interest rate	0.90%	0.60%
Expected dividend yield	0.80%	1.20%
Expected lives, years	5 years	4 years
Expected stock volatility	38.50%	38.70%