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Note 8 - Deposits (Details Textual) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
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Deposit Liabilities, Accrued Interest | $ 27.9 | $ 28.6 | $ 13.2
Geographic Distribution, Domestic [Member] |  |  |
Time Deposits, at or Above FDIC Insurance Limit | 5,600.0 | 5,300.0 |
Geographic Distribution, Foreign [Member] |  |  |
Time Deposits, at or Above FDIC Insurance Limit | $ 153.1 | $ 174.2 |

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- Definition Amount of accrued but unpaid interest on deposit liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(15)(5)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 + Details
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- Definition Amount of time deposit liabilities, including certificates of deposit, in denominations that meet or exceed the Federal Deposit Insurance Corporation (FDIC) insurance limit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 405 -Topic 942 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478353/942-405-50-1 + Details
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