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Note 12 - Commitments and Contingent Liabilities - Off Balance Sheet Commitments to Extend Credit (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Off balance sheet commitments to extend credit $ 2,317,035 $ 2,063,587
Commercial and Industrial Loans [Member]    
Off balance sheet commitments to extend credit 906,111 784,429
Construction and Development [Member]    
Off balance sheet commitments to extend credit 531,839 449,028
Home Equity Loans [Member]    
Off balance sheet commitments to extend credit 375,424 358,610
Credit Cards [Member]    
Off balance sheet commitments to extend credit 81,774 64,231
Overdrafts [Member]    
Off balance sheet commitments to extend credit 55,252 57,193
Letters of Credit [Member]    
Off balance sheet commitments to extend credit 32,883 34,704
Other Off Balance Sheet Commitments [Member]    
Off balance sheet commitments to extend credit 94,516 93,419
Future Loan Commitments [Member]    
Off balance sheet commitments to extend credit $ 239,236 $ 221,973