Share-Based Compensation (Assumptions For Weighted Average Fair Value Of Stock Options) (Details)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Stock Incentive Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (years)	5 years 10 months 24 days	6 years 1 month 6 days
Risk-free interest rate	1.69%	0.76%
Expected volatility	55.98%	61.48%
Expected dividend yield	3.90%	3.10%
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (years)	3 months	3 months
Risk-free interest rate	0.04%	0.10%
Expected volatility	43.24%	46.34%
Expected dividend yield	4.44%	3.63%