Note 15 - Financial Derivatives - Cash Flow Swap Hedges (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
		Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025	Dec. 31, 2025
Notional		$ 36,000		$ 36,000		$ 24,000
Fair Value Hedging [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Notional		$ 522,904		$ 522,904		$ 625,222
Weighted average fixed rate-pay		4.15%		4.15%		4.06%
Weighted average variable rate spread		0.18%		0.18%		0.19%
Weighted average variable rate-receive		3.87%		3.87%		4.41%
Net gain/(loss)(1)	[1]			$ 3,191		$ (2,417)
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Periodic net settlement of swaps	[2]	$ (507)	$ 510	$ (1,606)	$ 2,844

[1] the amount is included in other non-interest income.

[2] the amount of periodic net settlement of interest rate swaps was included in interest income.