Share-Based Compensation (Schedule Of Stock Option Activity) (Details) - shares	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Options outstanding, January 1	541,679	741,676
Options outstanding, March 31	859,182	541,679
Options exercisable, March 31	465,831	188,331
2012 Plan [Member]
Options granted	495,000	470,000
Options exercised	(155,829)	(608,331)
Options forfeited	(6,668)	0
2005 Plan [Member]
Options exercised	(15,000)	(61,666)