Note 14 - Financial Derivatives - Cash Flow Swap Hedges (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Unrealized loss, net of taxes		$ 3,614	$ (3,478)	$ (3,171)
Interest Rate Swap [Member]
Notional		324,800
Interest Rate Swap [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
Notional		$ 119,136	$ 119,136
Weighted average fixed rate-pay		2.61%	2.61%
Weighted average variable rate-receive		0.16%	0.44%
Unrealized loss, net of taxes	[1]	$ (3,276)	$ (6,890)
Periodic net settlement of swaps	[2]	$ 2,949	$ 2,193

[1] Included in other comprehensive income.

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