Share-Based Payments (Schedule Of Information Regarding Stock Options Outstanding) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Share-based Compensation [Abstract]
Options outstanding, Number	105	128
Options outstanding, weighted average per share exercise price	$ 52.60	$ 52.59
Options outstanding, aggregate intrinsic value	$ 1,424
Options outstanding, weighted average remaining contractual term (in years)	4 years 11 months 15 days
Options exercisable, Number	81
Options exercisable, weighted average per share exercise price	$ 52.10
Options exercisable, aggregate intrinsic value	$ 1,138
Options exercisable, weighted average remaining contractual term (in years)	4 years 4 months 27 days