Equity And Stock-Based Compensation (Schedule Of Fair Value Of Options, Weighted Average Assumptions) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Equity And Stock-Based Compensation [Abstract]
Stock option exercise price	$ 13.30	$ 8.56	$ 6.19
Risk-free interest rate	2.23%	2.51%	2.25%
Expected option life in years	4 years	5 years	5 years
Expected volatility	31.86%	31.33%	31.80%
Weighted average fair value	$ 3.82	$ 2.76	$ 1.98