Stock Based Compensation (Summary of Stock Option Activity) (Details) - $ / shares	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Shares
Options outstanding, beginning of year (in shares)	355,218		355,218
Exercised (in shares)		(6,250)	(10,000)	(21,550)
Options outstanding, end of year (in shares)			345,218
Options Exercisable (in shares)			335,216
Weighted Average Exercise Price
Options outstanding, beginning of year (in dollars per share)	$ 16.63		$ 16.63
Exercised (in dollars per share)			9.57
Options outstanding, end of year (in dollars per share)			16.83
Options exercisable (in dollars per share)			$ 16.59
Weighted Average Remaining Contractual Term
Options outstanding	5 years		4 years 4 months 24 days
Options exercisable			4 years 3 months 18 days