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Minimum Regulatory Capital Requirements - Additional Information (Detail) | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
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Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |  |  |  |
Minimum leverage ratio calculated as ratio of Tier 1 capital to average quarterly assets |  |  |  | 9.00%
Forecast [Member] | CECL Adjustment to Regulatory Capital [Member] |  |  |  |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |  |  |  |
Adjustment to regulatory capital | 25.00% | 50.00% | 25.00% |
Common Equity Tier 1 Capital [Member] |  |  |  |
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items] |  |  |  |
Capital conservation buffer |  |  |  | 2.50%

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- Definition Adjustment to regulatory capital + References No definition available. + Details
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- Definition Minimum requirement leverage ratio. + References No definition available. + Details
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- Definition Risk weighted assets capital conservation buffer. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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