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Securities Sold Under Agreements to Repurchase - Schedule of Assets and Liabilities Subject to an Enforceable Master Netting Arrangement or Repurchase Agreements (Parenthetical) (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
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Interest Rate Swap Agreements |  |
Offsetting Assets And Liabilities [Line Items] |  |
Fair value of investment securities pledged | $ 38.8 | $ 39.2
Private Institutions |  |
Offsetting Assets And Liabilities [Line Items] |  |
Fair value of investment securities pledged | 161.7 | 167.3
Government Entities |  |
Offsetting Assets And Liabilities [Line Items] |  |
Fair value of investment securities pledged | $ 0.7 | $ 0.7

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- Definition Fair value of securities pledged as collateral against securities sold under agreement to repurchase. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 12 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483444/210-20-55-12 + Details
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