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Commitments and Contingencies (Detail) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Commitments and Contingencies Disclosure [Abstract] |  |
Commitments to extend credit outstanding | $ 4,470.0 | $ 4,590.0
Maximum amount of future payments by the company | $ 153.9 | $ 185.5

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482425/460-10-50-4 + Details
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Balance Type: | credit
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- Definition Unused amount of commitments to extend credit to customers. + References No definition available. + Details
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