Note 12 - Commitments and Contingent Liabilities - Off Balance Sheet Commitments to Extend Credit (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Off balance sheet commitments to extend credit	$ 2,045,780	$ 1,691,152
Commercial and Industrial Loans [Member]
Off balance sheet commitments to extend credit	716,042	625,858
Construction and Development [Member]
Off balance sheet commitments to extend credit	416,488	292,351
Home Equity Loans [Member]
Off balance sheet commitments to extend credit	334,219	247,885
Credit Cards [Member]
Off balance sheet commitments to extend credit	51,108	40,471
Overdrafts [Member]
Off balance sheet commitments to extend credit	62,442	51,104
Letters of Credit [Member]
Off balance sheet commitments to extend credit	34,532	30,779
Other Off Balance Sheet Commitments [Member]
Off balance sheet commitments to extend credit	103,651	76,721
Future Loan Commitments [Member]
Off balance sheet commitments to extend credit	$ 327,298	$ 325,983