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CONDENSED CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
CONDENSED CONSOLIDATED BALANCE SHEETS [Abstract]    
Utility Plant, accumulated depreciation $ 199,048 $ 192,253
Accounts receivable, allowance for doubtful accounts 406 343
Non-utility property, accumulated depreciation $ 1,130 $ 1,116