Note 11 - FHLB Borrowings - FHLB Borrowings and Weighted Average Interest Rates (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Less than 1 year, amount	$ 603,587	$ 881,000
Less than 1 year, rate	5.50%	5.57%
1 year through less than 2 years, amount	$ 75,000	$ 25,000
1 year through less than 2 years, rate	3.30%	1.00%
2 years through less than 3 years, amount	$ 52,050	$ 2,050
2 years through less than 3 years	4.19%	2.23%
3 years through less than 4 years, amount	$ 25,276	$ 293
3 years through less than 4 years	4.17%	2.85%
4 years through 5 years, amount	$ 0	$ 25,000
4 years through 5 years, rate	0.00%	4.18%
After 5 years, amount	$ 278	$ 294
After 5 years, rate	2.96%	2.96%
FHLB borrowings - gross	$ 756,191	$ 933,637
FHLB borrowings, rate	5.15%	5.41%
Fair value discount	$ (47)	$ (58)
Borrowings	$ 756,144	$ 933,579