Note 17 - Net Income Per Share - Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net income available to stockholders	$ 29,817	$ 28,455	$ 26,794	$ 7,906	$ 24,589	$ 23,162	$ 4,184	$ 22,710	$ 17,736	$ 14,533	$ 13,368	$ 13,232	$ 92,972	$ 74,645	$ 58,869
Weighted average shares outstanding - basic (in shares)													28,672	24,898	22,563
Dilutive shares (in shares)													250	258	205
Weighted average shares outstanding - diluted (in shares)													28,922	25,156	22,768
Net income per share - basic (in dollars per share)	$ 1.02	$ 0.98	$ 0.92	$ 0.29	$ 0.93	$ 0.87	$ 0.17	$ 1.00	$ 0.79	$ 0.64	$ 0.59	$ 0.59	$ 3.24	$ 3.00	$ 2.61
Net income per share - diluted (in dollars per share)	$ 1.01	$ 0.97	$ 0.91	$ 0.29	$ 0.92	$ 0.87	$ 0.17	$ 0.99	$ 0.78	$ 0.64	$ 0.59	$ 0.58	$ 3.21	$ 2.97	$ 2.59