Note 12 - Commitments and Contingent Liabilities - Off Balance Sheet Commitments to Extend Credit (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Off balance sheet commitments to extend credit	$ 2,164,029	$ 1,691,152
Commercial and Industrial Loans [Member]
Off balance sheet commitments to extend credit	773,639	625,858
Construction and Development [Member]
Off balance sheet commitments to extend credit	456,863	292,351
Home Equity Loans [Member]
Off balance sheet commitments to extend credit	356,309	247,885
Credit Cards [Member]
Off balance sheet commitments to extend credit	58,391	40,471
Overdrafts [Member]
Off balance sheet commitments to extend credit	61,377	51,104
Letters of Credit [Member]
Off balance sheet commitments to extend credit	34,877	30,779
Other Off Balance Sheet Commitments [Member]
Off balance sheet commitments to extend credit	93,596	76,721
Future Loan Commitments [Member]
Off balance sheet commitments to extend credit	$ 328,977	$ 325,983