Stock-based Compensation (Summary Of Status Of Company's Equity Compensation Plans) (Details) - Stock Options [Member] - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Shares [Roll Forward]
Granted (in shares)	65,104	0
Exercised (in shares)		(23,125)
Aggregate intrinsic value [Abstract]
Exercised	$ 4,300,000
Equity Compensations Plans [Member]
Shares [Roll Forward]
Outstanding, beginning of period (in shares)	1,276,500
Granted (in shares)	65,104
Outstanding, end of period (in shares)	1,341,604		1,276,500
Exercisable, end of period (in shares)	1,201,500
Weighted average exercise price [Roll Forward]
Outstanding, beginning of period (in dollars per share)	$ 8.23
Granted (in dollars per share)	8.57
Outstanding, end of period (in dollars per share)	8.25		$ 8.23
Exercisable, end of period (in dollars per share)	$ 8.32
Weighted-average remaining contractual term (years) [Abstract]
Granted	3 years 4 months 17 days
Outstanding, end of period	3 years 3 months 29 days		3 years 9 months 7 days
Exercisable, end of period	2 years 9 months 18 days
Aggregate intrinsic value [Abstract]
Outstanding, beginning of period	$ 511,200
Granted
Exercised
Expired
Forfeited
Outstanding, end of period	2,280,348		$ 511,200
Exercisable, end of period	$ 1,957,510