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Retirement Plans - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items] |  |  |
Employee service period under ESOP | 1 year |  |
Deferred compensation obligations | $ 5,000 | $ 5,200 |
Cash values of the insurance policies purchased to fund deferred compensation obligations | 140,149 | 136,892 | $ 133,742
Funded status of the supplemental retirement plans | (16,085) | (13,527) |
AOCI, defined benefit plan, after tax | (11,329) | (9,528) |
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 | $ 140,100 | 136,900 |
Funded status of the supplemental retirement plans | 16,100 | 13,500 |
AOCI, defined benefit plan, after tax | 11,300 | 9,500 |
Deferred tax liability | $ (4,800) | $ (4,000) |

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- Definition Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-14A Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (j) -SubTopic 10 -Topic 220 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (k) -SubTopic 10 -Topic 220 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-10A Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (j) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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