Note 3 - Loans and Allowance for Credit Losses on Loans - Credit Card Loan Payment Activity (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Loans	$ 6,070,963	$ 5,771,038
Credit Card Receivable [Member]
Loans	24,047	23,632
Commercial Portfolio Segment [Member] \| Credit Card Receivable [Member]
Loans	24,047	23,632
Commercial Portfolio Segment [Member] \| Credit Card Receivable [Member] \| Performing Financial Instruments [Member]
Loans	23,861	23,512
Commercial Portfolio Segment [Member] \| Credit Card Receivable [Member] \| Nonperforming Financial Instruments [Member]
Loans	$ 186	$ 120

Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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+ Details