Note 4 - Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (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	$ 14,423	$ 12,238	$ 38,130	$ 33,157
Less preferred stock dividends	(225)	(225)	(675)	(364)
Basic earnings per share	$ 14,198	$ 12,013	$ 37,455	$ 32,793
Basic earnings per share (in shares)	12,766,473	12,964,575	12,755,576	12,953,053
Basic earnings per common share (in dollars per share)	$ 1.11	$ 0.93	$ 2.94	$ 2.53
Stock options (in shares)		789		3,278
Diluted earnings per share	$ 14,198	$ 12,013	$ 37,455	$ 32,793
Diluted earnings per share (in shares)	12,835,760	13,018,672	12,815,982	13,011,526
Diluted earnings per common share (in dollars per share)	$ 1.11	$ 0.92	$ 2.92	$ 2.52
Stock Appreciation Rights [Member]
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements (in shares)	65,915	48,827	56,035	49,951
Restricted Stock Units [Member]
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements (in shares)	3,372	4,481	4,371	5,244