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Note 10 - Borrowed Funds (Details Textual) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2024 | Dec. 31, 2023
Advance from Federal Home Loan Bank | $ 60,000 | $ 540,000
Federal Home Loan Bank, Advances, General Debt Obligations, Amount of Available, Unused Funds | 7,290,000 | 6,600,000
Debt Securities, Available-for-Sale | 1,508,356 | 1,604,570
Junior Subordinated Debt [Member] |  |
Junior Subordinated Notes, Noncurrent | $ 119,100 | $ 119,100
Debt Instrument, Interest Rate, Effective Percentage | 7.89% | 7.54%
Debt Instrument, Term (Year) | 30 years |
Mature in September 2024 [Member] |  |
Advance from Federal Home Loan Bank | $ 60,000 |
Federal Home Loan Bank Securities [Member] | Asset Not Pledged as Collateral [Member] |  |
Debt Securities, Available-for-Sale | 1,490,000 | $ 1,470,000
Over-night Borrowings [Member] |  |
Advance from Federal Home Loan Bank | 0 | 0
Non Overnight Borrowings [Member] |  |
Advance from Federal Home Loan Bank | $ 60,000 | $ 540,000
Federal Home Loan Bank, Advance, Branch of FHLBank, Interest Rate | 5.08% | 5.64%

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- Definition Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 470 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478878/942-470-45-1 + Details
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