Note 9 - Earnings Per Share - Earnings Per Share of Common Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Net income	$ 26,382	$ 17,313
Basic (in shares)	24,862,367	24,969,703
Common Share equivalents (in shares)	606,197	473,198
Diluted (in shares)	25,468,564	25,442,902
Basic earnings per share (in dollars per share)	$ 1.06	$ 0.69
Diluted earnings per share (in dollars per share)	$ 1.04	$ 0.68