Summary of Significant Accounting Policies (Schedule of Earnings Per Share, Basic and Diluted) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Summary of Significant Accounting Policies [Abstract]
Net income	$ 5,124	$ 5,232	$ 5,227	$ 5,451	$ 5,224	$ 4,594	$ 2,313	$ 4,632	$ 21,034	$ 16,763
Basic earnings per share - Income available to Common stockholders	$ 4,782	$ 4,890	$ 4,885	$ 5,134	$ 4,962	$ 4,331	$ 2,051	$ 4,466	19,688	15,810
Effect of dilutive securities: Stock options
Diluted earnings per share- Income available to Common stockholders									$ 19,688	$ 15,810
Basic earnings per share- Income available to Common stockholders, Shares									16,367	15,567
Effect of dilutive securities: Stock options: Shares									56	94
Diluted earnings per share- Income available to Common stockholders, Shares									16,423	15,661
Net income per common share: Basic	$ 0.29	$ 0.30	$ 0.30	$ 0.32	$ 0.31	$ 0.27	$ 0.13	$ 0.30	$ 1.20	$ 1.02
Diluted earnings per share - Income available to Common stockholders	$ 0.29	$ 0.30	$ 0.30	$ 0.32	$ 0.31	$ 0.27	$ 0.13	$ 0.29	$ 1.20	$ 1.01