Note 12 - Commitments and Contingent Liabilities - Off Balance Sheet Commitments to Extend Credit (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Off balance sheet commitments to extend credit	$ 2,148,536	$ 1,691,152
Commercial and Industrial Loans [Member]
Off balance sheet commitments to extend credit	813,750	625,858
Construction and Development [Member]
Off balance sheet commitments to extend credit	481,956	292,351
Home Equity Loans [Member]
Off balance sheet commitments to extend credit	348,216	247,885
Credit Cards [Member]
Off balance sheet commitments to extend credit	61,599	40,471
Overdrafts [Member]
Off balance sheet commitments to extend credit	57,963	51,104
Letters of Credit [Member]
Off balance sheet commitments to extend credit	35,001	30,779
Other Off Balance Sheet Commitments [Member]
Off balance sheet commitments to extend credit	93,502	76,721
Future Loan Commitments [Member]
Off balance sheet commitments to extend credit	$ 256,549	$ 325,983