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Electric utility segment - Condensed Consolidating Statement of Changes in Common Stock Equity (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Increase (decrease) in stockholders' equity |  |  |  |  |  |  |  |
Beginning balance | $ 1,085,273 | $ 2,377,380 | $ 2,344,841 | $ 2,249,377 | $ 2,237,955 | $ 2,202,499 | $ 2,344,841 | $ 2,202,499
Net income (loss) for common stock | (104,402) | (1,295,484) | 42,122 | 41,118 | 54,610 | 54,721 | (1,357,764) | 150,449
Other comprehensive loss, net of taxes | 39,360 | 1,594 | (9,801) | (34,875) | (7,609) | 20,488 | 31,153 | (21,996)
Common stock dividends |  |  |  | (39,455) | (39,447) | (39,446) |  |
Issuance of common stock, net of expenses | 575,000 |  |  |  |  |  |  |
Ending balance | 1,577,041 | 1,085,273 | 2,377,380 | 2,224,354 | 2,249,377 | 2,237,955 | 1,577,041 | 2,224,354
Hawaiian Electric Consolidated |  |  |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |  |  |
Beginning balance | 1,192,842 | 2,435,282 | 2,409,110 | 2,371,889 | 2,358,884 | 2,344,170 | 2,409,110 | 2,344,170
Net income (loss) for common stock | (82,585) | (1,229,394) | 39,221 | 43,461 | 45,299 | 47,009 | (1,272,758) | 135,769
Other comprehensive loss, net of taxes | 2 | (46) | (49) | (77) | (44) | (45) | (93) | (166)
Common stock dividends |  | (13,000) | (13,000) | (32,250) | (32,250) | (32,250) | (26,000) | (96,750)
Additional paid-in capital |  |  |  |  |  |  | 0 |
Issuance of common stock, net of expenses |  |  |  |  |  |  | 0 |
Ending balance | 1,110,259 | $ 1,192,842 | 2,435,282 | 2,383,023 | $ 2,371,889 | 2,358,884 | 1,110,259 | 2,383,023
Consolidating adjustments | Hawaiian Electric Consolidated |  |  |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |  |  |
Beginning balance |  |  | (722,211) |  |  | (701,833) | (722,211) | (701,833)
Net income (loss) for common stock | 18,558 |  |  | (3,005) |  |  | 258,633 | (25,960)
Other comprehensive loss, net of taxes | 5 |  |  | 9 |  |  | 29 | 32
Common stock dividends |  |  |  |  |  |  |  | 24,450
Additional paid-in capital |  |  |  |  |  |  | (686) |
Issuance of common stock, net of expenses |  |  |  |  |  |  | (205,215) |
Ending balance | (669,450) |  |  | (703,311) |  |  | (669,450) | (703,311)
Hawaiian Electric | Reportable Legal Entities | Hawaiian Electric Consolidated |  |  |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |  |  |
Beginning balance |  |  | 2,409,110 |  |  | 2,344,170 | 2,409,110 | 2,344,170
Net income (loss) for common stock | (82,585) |  |  | 43,461 |  |  | (1,272,758) | 135,769
Other comprehensive loss, net of taxes | 2 |  |  | (77) |  |  | (93) | (166)
Common stock dividends |  |  |  |  |  |  | (26,000) | (96,750)
Ending balance | 1,110,259 |  |  | 2,383,023 |  |  | 1,110,259 | 2,383,023
Hawaii Electric Light | Reportable Legal Entities | Hawaiian Electric Consolidated |  |  |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |  |  |
Beginning balance |  |  | 359,790 |  |  | 344,720 | 359,790 | 344,720
Net income (loss) for common stock | (7,175) |  |  | 7,419 |  |  | (123,080) | 20,884
Other comprehensive loss, net of taxes | 2 |  |  | (1) |  |  | (5) | (9)
Common stock dividends |  |  |  |  |  |  |  | (13,425)
Additional paid-in capital |  |  |  |  |  |  | 400 |
Ending balance | 237,105 |  |  | 352,170 |  |  | 237,105 | 352,170
Maui Electric | Reportable Legal Entities | Hawaiian Electric Consolidated |  |  |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |  |  |
Beginning balance |  |  | 362,344 |  |  | 357,036 | 362,344 | 357,036
Net income (loss) for common stock | (12,807) |  |  | (4,414) |  |  | (136,977) | 5,076
Other comprehensive loss, net of taxes | (7) |  |  | (8) |  |  | (24) | (23)
Common stock dividends |  |  |  |  |  |  |  | (11,025)
Additional paid-in capital |  |  |  |  |  |  | 286 |
Issuance of common stock, net of expenses |  |  |  |  |  |  | 55,000 |
Ending balance | 280,629 |  |  | 351,064 |  |  | 280,629 | 351,064
Other subsidiaries | Reportable Legal Entities | Hawaiian Electric Consolidated |  |  |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |  |  |
Beginning balance |  |  | $ 77 |  |  | $ 77 | 77 | 77
Net income (loss) for common stock | 1,424 |  |  | 0 |  |  | 1,424 | 0
Other comprehensive loss, net of taxes | 0 |  |  | 0 |  |  | 0 | 0
Issuance of common stock, net of expenses |  |  |  |  |  |  | 150,215 |
Ending balance | $ 151,716 |  |  | $ 77 |  |  | $ 151,716 | $ 77

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