Note 9 - Securities Sold Under Agreements to Repurchase - Securities Sold Under Agreements to Repurchase (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Asset Pledged as Collateral [Member]
Fair value of securities pledged	$ 149,336		$ 128,908
Mortgage-Backed Securities, Issued by Private Enterprises [Member] \| Asset Pledged as Collateral [Member]
Fair value of securities pledged	136,600		116,097
US Government-sponsored Enterprises Debt Securities [Member] \| Asset Pledged as Collateral [Member]
Fair value of securities pledged	12,736		12,811
Securities Sold under Agreements to Repurchase [Member]
Outstanding balance at end of period	87,513		$ 112,476
Average outstanding balance during the period	$ 93,040	$ 158,985
Weighted average interest rate at end of period	1.75%		1.80%
Average interest rate during the period	1.75%	2.08%
Maximum outstanding at any month end during the period	$ 87,513	$ 192,507

The aggregate fair value as of the balance sheet date of financial instruments and other positions owned by the entity including: (1) mortgages, mortgage-backed and asset backed securities; (2) US government and agency obligations; (3) state and municipal government obligations; (4) other sovereign government debt; (5) corporate obligations; (6) corporate equities; (7) principal investments; (8) derivative contracts; and (9) physical commodities. Includes both pledged and unpledged holdings.

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