Note 15 - Financial Derivatives - Fair Value Swap Hedges (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Unrealized gain/(loss), net of taxes (1)				$ 4,158	$ 1,702
Periodic net settlement of SWAPs	[1]	$ (1,328)	$ (2,387)	(3,089)	$ (4,774)
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Fair Value Hedging [Member]
Derivative, Notional Amount		$ 901,388		$ 901,388		$ 729,280
Weighted average fixed rate-pay		2.01%		2.01%		2.65%
Weighted average variable rate-receive		1.54%		1.54%		1.43%
Unrealized gain/(loss), net of taxes (1)	[2]			$ 23,375		$ (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		0.67%		0.67%		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.