Note 12 - Income Taxes (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Tax Expense (Benefit), Total	$ 6,508,000	$ 5,540,000	$ 12,899,000	$ 11,171,000
Effective Income Tax Rate Reconciliation, Percent, Total	29.60%	29.30%	30.00%	30.20%
Employee Service Share Based Compensation Tax Charge (Benefit) from Exercise Of Stock Options	$ 279,000	$ 68,000	$ 302,000	$ 124,000