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Retirement Plans - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items] |  |  |
Employee service period under ESOP | 1 year |  |
Deferred compensation obligations | $ 5,200 | $ 5,700 |
Cash values of the insurance policies purchased to fund deferred compensation obligations | 136,892 | 133,742 | $ 117,857
Funded status of the supplemental retirement plans | (13,527) | (13,901) |
AOCI, defined benefit plan, after tax | (9,528) | (9,792) |
Amortization of actuarial losses | $ 500 |  |
401(k) Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Minimum age for employees | 21 years |  |
Minimum period for employees to participate | 90 days |  |
Discretionary matching contribution equal to percentage of participant's contribution | 50.00% |  |
Discretionary matching contribution maximum percentage of eligible compensation | 4.00% |  |
Supplemental Retirement Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Cash values of the insurance policies purchased to fund deferred compensation obligations | $ 136,900 | 133,700 |
Funded status of the supplemental retirement plans | 13,500 | 13,900 |
AOCI, defined benefit plan, after tax | 9,500 | 9,800 |
Deferred tax liability | $ (4,000) | $ (4,100) |

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