Note 8 - Derivatives and Hedging Activities - Summary of Derivatives (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Derivative Assets	$ 187,341	$ 177,631
Derivative Liabilities	(215,735)	(200,701)
Hedged Derivatives | Cash Flow Hedges
Derivative Assets	1,689	2,284
Derivative Liabilities	(30,407)	(35,631)
Unhedged Derivatives
Derivative Assets	951	2,213
Interest rate caps | Hedged Derivatives | Cash Flow Hedges
Derivative Assets	2,847	8,327
Interest rate caps | Unhedged Derivatives
Derivative Assets	951	2,213
Interest rate swaps | Hedged Derivatives | Cash Flow Hedges
Derivative Assets	1,689	477
Derivative Liabilities	(30,407)	(33,824)
Interest rate swaps | Hedged Derivatives | Fair Value Hedges
Derivative Liabilities	(3,308)
Interest rate swaps | Unhedged Derivatives
Derivative Assets	181,854	166,614
Derivative Liabilities	(181,854)	(166,614)
Interest rate collars | Hedged Derivatives | Cash Flow Hedges
Derivative Liabilities	$ (166)	$ (263)