Note 14 - FHLB Advances and Other Borrowings (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Advance from Federal Home Loan Bank	$ 200,000	$ 50,000
Proceeds from FHLBank Advance, Investing Activities	2,400,000
Payments of FHLBank Borrowings, Financing Activities	2,250,000
Proceeds from FHLBank Advance, Investing Activities, Net of Short Term Maturities	950,000	50,000	$ 30,000
Payments of FHLBank Borrowings, Financing Activities, Net of Short Term Maturities	800,000	(0)	$ 152,744
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available	1,330,000	1,360,000
Correspondent Banks [Member]
Federal Funds Corresponding Banks Maximum Amount Available	$ 80,000	$ 80,000