Select Balance Sheet Information - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Electric Plant | ||
| Electric Plant in Service | $ 3,427,389 | $ 3,370,677 |
| Construction Work in Progress | 350,944 | 233,978 |
| Total Gross Electric Plant | 3,778,333 | 3,604,655 |
| Less Accumulated Depreciation | 886,444 | 899,401 |
| Net Electric Plant | 2,891,889 | 2,705,254 |
| Nonelectric Property, Plant and Equipment | ||
| Nonelectric Property, Plant and Equipment | 405,371 | 404,922 |
| Construction Work in Progress | 16,885 | 12,389 |
| Total Gross Nonelectric Property, Plant and Equipment | 422,256 | 417,311 |
| Less Accumulated Depreciation | 249,154 | 245,880 |
| Net Nonelectric Property, Plant and Equipment | 173,102 | 171,431 |
| Total Net Property, Plant and Equipment | $ 3,064,991 | $ 2,876,685 |
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- Definition Property, Plant and Equipment, Construction Work in Progress No definition available.
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- Definition Property, Plant and Equipment, Net Including Public Utilities No definition available.
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- Definition Property, Plant and Equipment, Plant in Service No definition available.
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- Definition Public Utilities, Property, Plant and Equipment, Gross No definition available.
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- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition Period end book value of accumulated depreciation on property, plant and equipment (PPE) that is owned by the regulated operations of the public utility. No definition available.
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- Definition Period end amount of construction work in progress in public utility. No definition available.
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- Definition Period end amount of total net PPE. No definition available.
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- References No definition available.
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- Definition Period end amount of total gross PPE. No definition available.
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