Note 12 - Commitments and Contingent Liabilities - Off Balance Sheet Commitments to Extend Credit (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Off balance sheet commitments to extend credit	$ 2,530,278	$ 2,438,242
Commercial and Industrial Loans [Member]
Off balance sheet commitments to extend credit	851,192	876,503
Construction and Development [Member]
Off balance sheet commitments to extend credit	587,692	566,045
Home Equity Loans [Member]
Off balance sheet commitments to extend credit	429,714	403,461
Credit Cards [Member]
Off balance sheet commitments to extend credit	93,788	92,060
Overdrafts [Member]
Off balance sheet commitments to extend credit	55,979	58,078
Letters of Credit [Member]
Off balance sheet commitments to extend credit	28,109	30,472
Other Off Balance Sheet Commitments [Member]
Off balance sheet commitments to extend credit	82,402	86,010
Future Loan Commitments [Member]
Off balance sheet commitments to extend credit	$ 401,402	$ 325,613