Share-Based Compensation (Schedule Of Stock Option Activity) (Details) - shares	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Options outstanding, January 1	859,182	541,679
Options outstanding, March 31	1,140,844	859,182
Options exercisable, March 31	697,490	465,831
2012 Plan [Member]
Options granted	560,000	495,000
Options exercised	(241,669)	(155,829)
Options forfeited	(30,001)	(6,668)
2005 Plan [Member]
Options exercised	(6,668)	(15,000)