Stock-Based Compensation (Fair Value Of Grant On Date Of Grant Using The Black-Scholes Options Pricing Model) (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Risk-free interest rate (in hundredths)	0.00%	2.36%	1.86%
Expected volatility (in hundredths)	0.00%
Expected lives (years)	2 years
Minimum [Member]
Expected volatility (in hundredths)	49.71%	41.74%
Expected lives (years)		5 years 8 months 16 days	4 years 11 days
Maximum [Member]
Expected volatility (in hundredths)	55.65%
Expected lives (years)			4 years 2 months 19 days