Securities - Additional Information (Detail) - USD ($) |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
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| Debt Securities, Available-for-sale [Line Items] | ||
| Proceeds from sales of securities | $ 0 | $ 0 |
| Unrealized loss on securities | $ 0 | |
| Minimum | U.S. Government and its Agencies | ||
| Debt Securities, Available-for-sale [Line Items] | ||
| Holdings of securities as percentage of share holders' equity | 10.00% | |
| X | ||||||||||
- Definition Holdings of securities as percentage of share holders' equity. No definition available.
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| X | ||||||||||
- Definition Amount of unrealized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of cash inflow from sale, maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- 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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
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