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General - Schedule of Nonutility Properties and Real Estate Investments (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Schedule of Investments [Line Items]    
Land $ 915 $ 4,137
Wholesale water supply assets 0 8,465
Buildings and improvements 437 748
Nonutility properties and real estate investments 1,352 13,350
Less: accumulated depreciation and amortization 97 194
Net nonutility properties and real estate investments $ 1,255 13,156
Tennessee Properties    
Schedule of Investments [Line Items]    
Land   13,170
Buildings and improvements   44,950
Nonutility properties and real estate investments   58,120
Less: accumulated depreciation and amortization   17,270
Net nonutility properties and real estate investments   $ 40,850