Earnings per Common Share - Computation of earnings per share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income available to common shareholders (in thousands):
Net income	$ 7,674	$ 5,074
Less: Income attributable to unvested restricted stock awards	(36)	(26)
Net income available to common shareholders	$ 7,638	$ 5,048
Weighted average shares outstanding:
Common shares outstanding, including unvested restricted stock	13,847,560	13,627,621
Less: Unvested restricted stock	(64,526)	(69,842)
Weighted-average common shares outstanding - basic	13,783,034	13,557,779
Earnings per common share - basic	$ 0.55	$ 0.37
Income available to common shareholders (in thousands):
Net income	$ 7,674	$ 5,074
Less: Income attributable to unvested restricted stock awards	(36)	(26)
Net income available to common shareholders	$ 7,638	$ 5,048
Weighted average shares outstanding:
Common shares outstanding, including unvested restricted stock	13,847,560	13,627,621
Less: Unvested restricted stock	(64,526)	(69,842)
Plus: Effect of dilutive options	208,658	251,972
Weighted-average common shares outstanding - diluted	13,991,692	13,809,751
Earnings per common share - diluted	$ 0.55	$ 0.37