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Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Other Commitments [Line Items] |  |  |
Outstanding loan commitments | $ 274.3 |  | $ 283.2
Cancellable amounts | 110.6 |  | 108.4
Outstanding stand-by letters of credit | 11.3 |  | 12.5
Credit losses for unfunded commitments | 0.0 | $ 1.0 |
Future commitments outstanding related to investments | 6.2 |  |
Mortgage Servicing Rights Assets [Member] |  |  |
Other Commitments [Line Items] |  |  |
Reserve | 1.7 |  | 1.8
Other Liabilities [Member] |  |  |
Other Commitments [Line Items] |  |  |
Reserves for unfunded commitments to borrowers | $ 0.9 |  | $ 0.9

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- Definition Credit losses for unfunded commitments. + References No definition available. + Details
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- Definition Reserves for unfunded commitments to borrowers. + References No definition available. + Details
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- Definition The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-4 + Details
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- Details
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