Note 10 - FHLB Borrowings - FHLB Borrowings and Weighted Average Interest Rates (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Less than 1 year, amount	$ 847,337	$ 390,549
Less than 1 year, rate	1.86%	0.56%
1 year through less than 2 years, amount	$ 0	$ 50,000
1 year through less than 2 years, rate		1.84%
2 years through less than 3 years, amount	25,000	$ 0
3 years through less than 4 years, amount	$ 2,050	$ 25,000
3 years through less than 4 years, rate	2.23%	1.00%
4 years through 5 years, amount	$ 0	$ 2,050
4 years through 5 years, rate		2.23%
After 5 years, amount	$ 683	$ 714
After 5 years, rate	2.91%	2.91%
FHLB borrowings - gross, amount	$ 875,070	$ 468,313
FHLB borrowings - gross, rate	1.84%	0.73%
Fair value (discount)	$ (106)	$ (120)
Total FHLB borrowings, amount	$ 874,964	$ 468,193