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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Valuation and qualifying accounts |  |  |
Bad debt expenses deferred to regulatory assets | $ 16,200 | $ 10,700 | $ 16,700
Bill credits |  | 2,000 |
Allowance for uncollectible accounts – electric utility | Hawaiian Electric Company, Inc. and Subsidiaries |  |  |
Valuation and qualifying accounts |  |  |
Balance at begin- ning of period | 26,100 | 17,809 | 1,377
Charged to costs and expenses | 6,028 | 4,183 | 2,100
Charged to other accounts | (14,626) | 11,795 | 18,041
Deductions | 11,391 | 7,687 | 3,709
Balance at end of period | $ 6,111 | $ 26,100 | $ 17,809

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