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Note 8 - Loans and Related Allowance for Credit Losses - Loans Acquired (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Dec. 01, 2022
Outstanding balance	$ 1,382,847	$ 1,352,872
Carrying amount	$ 1,362,685	1,338,434
Financial Asset Acquired with Credit Deterioration [Member]
Outstanding balance		6,068
Liberty Bancshares Inc [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Outstanding balance		7,998	$ 7,919
Carrying amount		$ 6,068	$ 6,019

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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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