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Cash Value of Life Insurance (Detail) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 USD ($) company employee policy | Dec. 31, 2023 USD ($) policy employee company | Dec. 31, 2022 USD ($)
Insurance [Roll Forward] |  |  |
Beginning balance | $ 136,892 | $ 133,742 |
Increase in cash value of life insurance | 3,257 | 3,150 | $ 2,858
Ending balance | 140,149 | 136,892 | $ 133,742
End of period death benefit | $ 224,723 | $ 224,021 |
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 |

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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/1943274/2147478524/942-220-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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