Note 3 - Earnings Per Share - Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net income	$ 10,103	$ 5,360
Less: income allocated to participating securities	(16)	(20)
Net income allocated to common shareholders	$ 10,087	$ 5,340
Weighted average basic shares outstanding (in shares)	10,335,334	10,509,468
Basic earnings per common share (in dollars per share)	$ 0.98	$ 0.51
Net income allocated to common shareholders	$ 10,087	$ 5,340
Dilutive effect of securities (in shares)	70,449	57,705
Total weighted average diluted shares outstanding (in shares)	10,405,783	10,567,173
Diluted earnings per common share (in dollars per share)	$ 0.97	$ 0.51