Share-Based Compensation (Schedule Of Stock Option Activity) (Details) - shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Options outstanding, January 1	859,182	541,679
Options outstanding, March 31	1,404,182	979,178
Options exercisable, March 31	949,160	585,827
2012 Plan [Member]
Options granted	560,000	485,000
Options exercised	0	(25,833)
Options forfeited	(15,000)	(6,668)
2005 Plan [Member]
Options exercised	0	(15,000)