Securities - Additional Information (Detail) - USD ($) |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
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| Debt Securities, Available-for-sale [Line Items] | ||||
| Proceeds from sales of securities | $ 8,149,000 | $ 0 | $ 55,884,000 | |
| Net gains (loss) in earnings resulting from sale of securities | (1,871,000) | (499,000) | ||
| Net unrealized gains (losses) recorded in comprehensive income | (1,700,000) | 1,700,000 | $ (100,000) | $ 100,000 |
| Securities available for sale | 865,739,000 | 853,838,000 | ||
| Available for sale securities pledged as collateral | $ 24,800,000 | $ 23,400,000 | ||
| 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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- Definition Pledged financial instruments, not separately reported, mortgage-related securities available-for-sale or held-for-investments. No definition available.
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- Definition Amount 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/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of realized gain (loss) from sale of 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, after tax and before adjustment, of unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- 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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