Employee Postretirement Benefits - Composition of Periodic Benefit Cost (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
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| Retirement Benefits [Abstract] | ||
| Net Periodic Benefit Cost (Income) | $ (135) | $ (603) |
| Net Amount Amortized Due to the Effect of Regulation | 679 | 320 |
| Net Periodic Benefit Cost (Income) Recognized | $ 544 | $ (283) |
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- Definition Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Deferred No definition available.
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| X | ||||||||||
- Definition Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Net of Deferrals No definition available.
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| X | ||||||||||
- References No definition available.
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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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