Earnings Per Common Share (Calculation of Basic and Diluted Earnings Per Share - Current Period) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income	$ 5,209	$ 4,409	$ 12,040	$ 11,431
Net income allocated to participating securities	40	45	140	110
Net income	$ 5,169	$ 4,364	$ 11,900	$ 11,321
Weighted average common shares outstanding - basic (in shares)	7,675	7,721	7,640	7,738
Effect of dilutive securities:
Weighted average common shares outstanding - diluted (in shares)	7,712	7,752	7,701	7,776
EPS available to common shareholders
Basic earnings per common share (in dollars per share)	$ 0.68	$ 0.57	$ 1.56	$ 1.48
Diluted earnings per common share (in dollars per share)	$ 0.67	$ 0.56	$ 1.55	$ 1.46
Earnings per share calculation under two-class method
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Weighted average common shares - issued (in shares)	7,734	7,721	7,730	7,738
Average unvested restricted share awards (in shares)	(59)	(80)	(90)	(76)
Weighted average common shares outstanding - basic (in shares)	7,675	7,641	7,640	7,662
Effect of dilutive securities:
Weighted average common stock equivalents (in shares)	37	111	61	114
Weighted average common shares outstanding - diluted (in shares)	7,712	7,752	7,701	7,776