Note 9 - Derivatives and Hedging Activities - Fair Value of Derivative Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets [Abstract]
Other Assets	$ 127,459	$ 125,566
Liabilities [Abstract]
Accrued Liabilities	$ 106,926	$ 93,902
Derivative Assets, balance sheet location	Other Assets	Other Assets
Derivative Liabilities balance sheet location	Accrued Liabilities	Accrued Liabilities
Interest Rate Swap [Member]
Notional Amount	$ 766,564	$ 676,526
Derivative Assets Interest rate swaps	29,661	27,505
Derivative Liabilities Interest rate swaps	30,036	27,964
Interest Rate Swap Liabilities [Member]
Notional Amount	$ 764,537	$ 674,499