Postretirement Benefits - Schedule of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
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| Retirement Benefits [Abstract] | ||||
| Service cost—benefits earned during the period | $ 6,243 | $ 6,228 | $ 12,485 | $ 12,449 |
| Interest cost on projected benefit obligation | 9,024 | 8,308 | 18,049 | 16,575 |
| Expected return on assets | (11,563) | (10,647) | (23,126) | (21,293) |
| Prior service cost | 292 | 269 | 584 | 538 |
| Actuarial (gain) loss | 0 | 6 | 0 | 12 |
| Net periodic benefit cost | $ 3,996 | $ 4,164 | $ 7,992 | $ 8,281 |
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- References No definition available.
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of prior service cost (credit) recognized in net periodic benefit cost (credit) of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of cost recognized for passage of time related to defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- 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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