Note 4 - Earnings Per Common Share - Basic and Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net Income	$ 8,731	$ 12,329
Weighted Average Common Shares Outstanding (in shares)	21,019,716	20,621,930
Dilutive Effect of Stock Options and RSAs (in shares)	142,766	116,083
Weighted Average Dilutive Common Shares (in shares)	21,162,482	20,738,013
Basic Earnings Per Common Share From Net Income Available to Common Shares (in dollars per share)	$ 0.42	$ 0.60
Diluted Earnings Per Common Share From Net Income Available to Common Shares (in dollars per share)	$ 0.41	$ 0.59