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Cash Value of Life Insurance - Summary of Activity in Balance of Cash Value of Life Insurance (Detail) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 USD ($) company policy employee | Dec. 31, 2022 USD ($) company policy employee | Dec. 31, 2021 USD ($)
Insurance [Roll Forward] |  |  |
Beginning balance | $ 133,742 | $ 117,857 |
Increase in cash value of life insurance | 3,150 | 2,858 | $ 2,775
Gain on death benefit | 0 | 309 | 702
Insurance proceeds receivable reclassified to other assets | 0 | (891) |
Ending balance | 136,892 | 133,742 | $ 117,857
End of period death benefit | $ 224,021 | $ 223,427 |
Number of policies owned (in policies) | policy | 216 | 216 |
Insurance companies used (in companies) | company | 14 | 14 |
Current and former employees and directors covered (in employees) | employee | 79 | 79 |
FNBB |  |  |
Insurance [Roll Forward] |  |  |
Acquired policies from business combination | $ 0 | $ 13,609 |

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- Definition Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Cash Value Of Life Insurance + References No definition available. + Details
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- Definition Current and former employees and directors covered . + References No definition available. + Details
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- Definition Number of policies owned. + References No definition available. + Details
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- Definition Earnings on or other increases in the value of the cash surrender value of bank owned life insurance policies. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1 + Details
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- Definition Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(17)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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- Definition Amount of excess (deficiency) of insurance recovery over the loss incurred from an insured event. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483049/450-30-50-1 + Details
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