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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
ASSETS |  |
Utility Plant, accumulated depreciation | $ 121,890 | $ 116,945
Current assets |  |
Accounts receivable, allowance for doubtful accounts | 302 | 288
Other assets |  |
Non-utility Property, accumulated depreciation | $ 726 | $ 689

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