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CONDENSED CONSOLIDATED BALANCE SHEETS Parenthetical - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
ASSETS |  |
Less - accumulated depreciation | $ 119,766 | $ 116,945
Current assets |  |
Accounts receivable (allowance for doubtful accounts) | 294 | 288
Other assets |  |
Non utility property (accumulated depreciation) | $ 708 | $ 689

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