Note 19 - Derivative Instruments - Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location (Details) - Designated as Hedging Instrument [Member] - USD ($) $ in Thousands		9 Months Ended		12 Months Ended
		Sep. 30, 2024		Dec. 31, 2023
Mortgage-backed securities, Notional Amount		$ 200,000		$ 600,000
Mortgage-backed securities, Carrying Amount		201,113		600,339
Mortgage-backed securities, Fair Value		1,113		339
Residential Mortgage-Backed Securities [Member]
Mortgage-backed securities, Notional Amount		200,000	[1]	200,000	[2]
Mortgage-backed securities, Carrying Amount		201,113	[1]	200,241	[2]
Mortgage-backed securities, Fair Value		$ 1,113	[1]	241	[2]
Mortgage Loan Pools [Member]
Mortgage-backed securities, Notional Amount	[3]			400,000
Mortgage-backed securities, Carrying Amount	[3]			400,098
Mortgage-backed securities, Fair Value	[3]			$ 98

[1] Includes amounts related to residential agency mortgage-backed securities currently designated as the hedged item in a fair value hedge using the portfolio layer method. At September 30, 2024, the amortized cost of the closed portfolios used in these hedging relationships was $313.0 million.

[2] Includes amounts related to residential agency mortgage-backed securities currently designated as the hedged item in a fair value hedge using the portfolio layer method. At December 31, 2023, the amortized cost of the closed portfolios used in these hedging relationships was $323.4 million.

[3] These amounts include the amortized cost basis of residential real estate loans that were used to designate hedging relationships in which the hedged item is the stated amount of assets in the closed portfolio anticipated to be outstanding for the designated hedged period. At December 31, 2023, the amortized cost basis of the residential real estate loans used in these hedging relationships was $687.5 million.