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Property, plant and equipment - Additional Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Property, Plant, and Equipment Disclosure [Line Items] |  |
Contribution received | $ 672 | $ 238
Utility plant |  |
Property, Plant, and Equipment Disclosure [Line Items] |  |
Renewable generation assets related to facilities under capital lease and owned by consolidated VIE | 2,146,852 | 1,961,720
Renewable generation assets related to facilities under capital lease and owned by consolidated VIE, accumulated depreciation | 171,920 | 98,128
Regulated Services Group |  |
Property, Plant, and Equipment Disclosure [Line Items] |  |
Cost of distribution assets | 3,351 | 3,270
Accumulated depreciation | 2,970 | 2,455
Hydro: generation facilities and other |  |
Property, Plant, and Equipment Disclosure [Line Items] |  |
Renewable generation assets related to facilities under capital lease and owned by consolidated VIE | 74,818 | 77,859
Renewable generation assets related to facilities under capital lease and owned by consolidated VIE, accumulated depreciation | 38,692 | 40,386
Depreciation expense | 974 | 461
Land |  |
Property, Plant, and Equipment Disclosure [Line Items] |  |
Cost of distribution assets | 5,263 | 5,263
Construction-in-progress |  |
Property, Plant, and Equipment Disclosure [Line Items] |  |
Cost of distribution assets | $ 43,319 | $ 15,770

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- Definition Capital Leased Assets and Plant Property and Equipment Owned by Consolidated VIE, Accumulated Depreciation + References No definition available. + Details
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