Benefit Plans - Additional Information (Detail) - USD ($) |
3 Months Ended | 6 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|---|
Sep. 30, 2026 |
Jun. 30, 2026 |
Sep. 30, 2025 |
Jun. 30, 2026 |
Sep. 30, 2026 |
Sep. 30, 2025 |
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| Retirement Benefits [Abstract] | ||||||
| Service cost | $ 209,000 | $ 269,000 | $ 667,000 | $ 800,000 | ||
| Periodic pension income | 3,400,000 | $ 2,700,000 | ||||
| Minimum required pension plan contribution | 2,900,000 | 2,900,000 | ||||
| Available credit balance | $ 67,400,000 | 67,400,000 | ||||
| Expected voluntary contribution for the year 2026 | $ 0 | |||||
| Pre-tax curtailment gain | $ 4,800,000 | |||||
| Reduction of benefit obligation | $ 53,200,000 | |||||
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of (increase) decrease to benefit obligation of defined benefit plan from remeasurement due to settlement. Excludes decrease to benefit obligation for settlement payment. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of contributions received and expected to be received by defined benefit plan from employer in current fiscal year. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Defined benefit plan, periodic pension income. No definition available.
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| X | ||||||||||
- Definition Defined Benefit Plan, Pre-Tax Curtailment Gain No definition available.
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| X | ||||||||||
- Definition Amount of voluntary contributions received and expected to be received by defined benefit plan from employer in current fiscal year. No definition available.
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