Note 23 - Fair Value of Assets and Liabilities - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Trading	$ 2,708	$ 0
U.S. treasury and government agencies	466,003	486,736
US Treasury Securities [Member]
U.S. treasury and government agencies	739	1,120
Residential Mortgage-Backed Securities [Member]
U.S. treasury and government agencies	414,388	435,594
Commercial Mortgage-Backed Securities [Member]
U.S. treasury and government agencies	1,401	1,353
Asset-Backed Securities [Member]
U.S. treasury and government agencies	20	25
Corporate Bond Securities [Member]
U.S. treasury and government agencies	49,455	$ 48,644
Fair Value, Recurring [Member]
Trading	2,708
U.S. treasury and government agencies	466,003		$ 486,736
Derivatives	12,177		8,512
Derivatives	13,329		9,180
Fair Value, Recurring [Member] | US Treasury Securities [Member]
U.S. treasury and government agencies	739		1,120
Fair Value, Recurring [Member] | Residential Mortgage-Backed Securities [Member]
U.S. treasury and government agencies	414,388		435,594
Fair Value, Recurring [Member] | Commercial Mortgage-Backed Securities [Member]
U.S. treasury and government agencies	1,401		1,353
Fair Value, Recurring [Member] | Asset-Backed Securities [Member]
U.S. treasury and government agencies	20		25
Fair Value, Recurring [Member] | Corporate Bond Securities [Member]
U.S. treasury and government agencies	49,455		48,644
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Trading	2,708
U.S. treasury and government agencies	0		0
Derivatives	0		0
Derivatives	0		0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US Treasury Securities [Member]
U.S. treasury and government agencies	0		0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Residential Mortgage-Backed Securities [Member]
U.S. treasury and government agencies	0		0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commercial Mortgage-Backed Securities [Member]
U.S. treasury and government agencies	0		0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Asset-Backed Securities [Member]
U.S. treasury and government agencies	0		0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Corporate Bond Securities [Member]
U.S. treasury and government agencies	0		0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Trading	0
U.S. treasury and government agencies	466,003		486,736
Derivatives	12,177		8,512
Derivatives	13,329		9,180
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US Treasury Securities [Member]
U.S. treasury and government agencies	739		1,120
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Residential Mortgage-Backed Securities [Member]
U.S. treasury and government agencies	414,388		435,594
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial Mortgage-Backed Securities [Member]
U.S. treasury and government agencies	1,401		1,353
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Asset-Backed Securities [Member]
U.S. treasury and government agencies	20		25
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate Bond Securities [Member]
U.S. treasury and government agencies	49,455		48,644
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]
Trading	0
U.S. treasury and government agencies	0		0
Derivatives	0		0
Derivatives	0		0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US Treasury Securities [Member]
U.S. treasury and government agencies	0		0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Residential Mortgage-Backed Securities [Member]
U.S. treasury and government agencies	0		0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial Mortgage-Backed Securities [Member]
U.S. treasury and government agencies	0		0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Asset-Backed Securities [Member]
U.S. treasury and government agencies	0		0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Corporate Bond Securities [Member]
U.S. treasury and government agencies	$ 0		$ 0