Earnings Per Common Share (Schedule of earnings per share calculation) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Numerator:
Net income available to common shareholders	$ 2,217	$ 7,412	$ 9,727	$ 20,661
Denominator:
Weighted-average common shares outstanding - basic	7,732,293	7,548,184	7,711,181	7,501,337
Common stock equivalents	82,972	232,320	109,164	258,274
Weighted-average common shares outstanding - diluted	7,815,265	7,780,504	7,820,345	7,759,611
Earnings per common share:
Basic	$ 0.29	$ 0.98	$ 1.26	$ 2.75
Diluted	$ 0.28	$ 0.95	$ 1.24	$ 2.66