Note 4 - Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Net income	$ 17,047	$ 14,101
Less preferred stock dividends	(225)	(225)
Basic earnings per share	$ 16,822	$ 13,876
Basic earnings per share (in shares)	14,683,596	12,783,851
Basic earnings per common share (in dollars per share)	$ 1.15	$ 1.09
Diluted earnings per share	$ 16,822	$ 13,876
Diluted earnings per share (in shares)	14,750,052	12,830,102
Diluted earnings per common share (in dollars per share)	$ 1.14	$ 1.08
Stock Appreciation Rights [Member]
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements (in shares)	65,017	43,287
Restricted Stock Units [Member]
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements (in shares)	1,439	2,964