Note 15 - Financial Derivatives - Fair Value Swap Hedges (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Unrealized gain/(loss), net of taxes (1)				$ 5,803	$ 2,194
Periodic net settlement of SWAPs	[1]	$ 1,461	$ (2,363)	(1,628)	$ (7,137)
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Fair Value Hedging [Member]
Derivative, Notional Amount		$ 877,188		$ 877,188		$ 729,280
Weighted average fixed rate-pay		2.14%		2.14%		2.65%
Weighted average variable rate-receive		1.98%		1.98%		1.43%
Unrealized gain/(loss), net of taxes (1)	[2]			$ 40,465		$ (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		0.54%		0.54%		1.31%

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

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