Share-Based Compensation (Summary Of Stock Options Valuation Assumptions) (Details)	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Share-Based Compensation [Abstract]
Expected stock price volatility	46.40%	45.50%
Risk free interest rate	1.50%	1.60%
Expected life (years)	5 years	5 years