Note 12 - Earnings Per Share - Basic and Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Net income	$ 13,351	$ 12,608	$ 34,079	$ 40,613
Weighted average common shares outstanding, basic (in shares)	16,378,022	17,221,244	16,617,766	17,457,477
Total dilutive effect of potential common shares (in shares)	35,180	58,332	36,931	54,423
Weighted average common shares outstanding, diluted (in shares)	16,413,202	17,279,576	16,654,697	17,511,900
Basic earnings per common share (in dollars per share)	$ 0.82	$ 0.73	$ 2.05	$ 2.32
Diluted earnings per common share (in dollars per share)	$ 0.81	$ 0.73	$ 2.05	$ 2.32
Antidilutive potential common shares (in shares)	131,198	0	131,198	14,204
Share-Based Payment Arrangement, Option [Member]
Dilutive effect of potential common shares (in shares)	18,975	33,370	16,615	31,094
Antidilutive potential common shares (in shares)	131,198	0	131,198	13,990
Restricted Stock [Member]
Dilutive effect of potential common shares (in shares)	10,570	24,962	14,681	23,329
Antidilutive potential common shares (in shares)	0	0	0	214
Performance Shares [Member]
Dilutive effect of potential common shares (in shares)	5,635	0	5,635	0