Note 7 - Loans and Related Allowance for Credit Losses - Collateral-dependent Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Outstanding balance	$ 1,478,130	$ 1,352,872
Real Estate [Member]
Outstanding balance	8,150
Blanket Lien [Member]
Outstanding balance	0
Investment and Cash [Member]
Outstanding balance	0
Other Collateral [Member]
Outstanding balance	0
Collateral Pledged [Member]
Outstanding balance	8,150
Commercial Real Estate Portfolio Segment [Member] \| Non-owner occupied Loan [Member]
Outstanding balance	401,580	$ 380,580
Commercial Real Estate Portfolio Segment [Member] \| Non-owner occupied Loan [Member] \| Real Estate [Member]
Outstanding balance	8,150
Commercial Real Estate Portfolio Segment [Member] \| Non-owner occupied Loan [Member] \| Blanket Lien [Member]
Outstanding balance	0
Commercial Real Estate Portfolio Segment [Member] \| Non-owner occupied Loan [Member] \| Investment and Cash [Member]
Outstanding balance	0
Commercial Real Estate Portfolio Segment [Member] \| Non-owner occupied Loan [Member] \| Other Collateral [Member]
Outstanding balance	0
Commercial Real Estate Portfolio Segment [Member] \| Non-owner occupied Loan [Member] \| Collateral Pledged [Member]
Outstanding balance	$ 8,150

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