Note 4 - Loans - Schedule of Allowance For Credit Loss (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Beginning balance	$ 36,811	$ 35,863	$ 35,863
(Credit) Provision for credit losses	(1,013)	22
Initial allowance on loans purchased with credit deterioration	3,995
Initial allowance on purchased seasoned loans	15,335
Loans charged off	(729)	(698)
Recoveries	285	362
Total ending allowance balance	54,684	35,549	36,811
Commercial Real Estate Portfolio Segment [Member]
Beginning balance	20,064	19,259	19,259
(Credit) Provision for credit losses	(1,771)	263
Initial allowance on loans purchased with credit deterioration	3,380
Initial allowance on purchased seasoned loans	8,377
Loans charged off	(1)	(44)
Recoveries	0	2
Total ending allowance balance	30,049	19,480	20,064
Commercial Portfolio Segment [Member]
Beginning balance	4,536	4,628	4,628
(Credit) Provision for credit losses	329	(125)
Initial allowance on loans purchased with credit deterioration	600
Initial allowance on purchased seasoned loans	2,746
Loans charged off	(291)	(313)
Recoveries	121	193
Total ending allowance balance	8,041	4,383	4,536
Residential Portfolio Segment [Member]
Beginning balance	7,241	7,271	7,271
(Credit) Provision for credit losses	13	(234)
Initial allowance on loans purchased with credit deterioration	15
Initial allowance on purchased seasoned loans	4,102
Loans charged off	(83)	(19)
Recoveries	43	47
Total ending allowance balance	11,331	7,065	7,241
Consumer Portfolio Segment [Member]
Beginning balance	4,970	4,705	4,705
(Credit) Provision for credit losses	416	118
Initial allowance on loans purchased with credit deterioration	0
Initial allowance on purchased seasoned loans	110
Loans charged off	(354)	(322)
Recoveries	121	120
Total ending allowance balance	$ 5,263	$ 4,621	$ 4,970

Amount of increase in allowance for credit loss for financing receivable from purchased seasoned loan.

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Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Amount of increase in allowance for credit loss on financing receivable from recovery.

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Amount of allowance for credit loss at acquisition date of financing receivable purchased with credit deterioration.

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Amount of credit loss expense (reversal of expense) for financing receivable.

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