Note 16 - Financial Derivatives - Fair Value Swap Hedges (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net gain/(loss) (1)		$ 5,813	$ 3,614	$ (3,478)
Periodic net settlement of SWAPs	[1]	3,107	(9,345)
Interest Rate Swap [Member]
Derivative, Notional Amount		204,300
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Fair Value Hedging [Member]
Derivative, Notional Amount		$ 874,034	$ 729,280
Weighted average fixed rate-pay		2.12%	2.65%
Weighted average variable rate-receive		2.61%	1.43%
Net gain/(loss) (1)		$ 38,589	$ (1,013)
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] | London Interbank Offered Rate (LIBOR) [Member]
Weighted average variable rate spread		0.68%	1.31%

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