Earnings Per Common Share (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
Numerator:
Net income - basic	$ 7,285	$ 6,847	$ 20,884	$ 18,081
Net income - diluted	$ 7,285	$ 6,847	$ 20,884	$ 18,081
Denominator:
Weighted average shares outstanding - basic (in shares)	7,327,395	7,304,273	7,321,092	6,993,990
Weighted average shares outstanding - diluted (in shares)	7,342,678	7,340,498	7,341,747	7,032,059
Earnings per common share:
Basic (in dollars per share)	$ 0.99	$ 0.94	$ 2.85	$ 2.59
Diluted (in dollars per share)	$ 0.99	$ 0.93	$ 2.84	$ 2.57
Plus: Effect of Director Stock Compensation Program
Denominator:
Effect of dilutive securities (in shares)	272	330	1,088	1,529
Plus: Effect of stock options and restricted stock
Denominator:
Effect of dilutive securities (in shares)	15,011	35,895	19,567	36,540