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Shareholders' equity - Reclassification out of AOCI (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Revenues | $ (897,360) | $ (895,685) | $ (1,794,518) | $ (1,823,922)
Interest expense | 32,400 | 29,832 | 63,991 | 58,630
Reclassification out of Accumulated Other Comprehensive Income |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Total reclassifications | 3,251 | 3,710 | 6,299 | 7,407
Hawaiian Electric Company, Inc. and Subsidiaries |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Revenues | (792,331) | (794,191) | (1,580,909) | (1,624,552)
Total reclassifications | 1,228,895 | (45,798) | 1,189,175 | (93,306)
Hawaiian Electric Company, Inc. and Subsidiaries | Reclassification out of Accumulated Other Comprehensive Income |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Total reclassifications | (46) | (44) | (95) | (89)
Amortization of unrealized holding losses on held-to-maturity securities | Reclassification out of Accumulated Other Comprehensive Income |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Revenues | 3,288 | 3,689 | 6,374 | 7,366
Net realized gains on derivatives qualifying as cash flow hedges | Reclassification out of Accumulated Other Comprehensive Income |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Interest expense | (51) | (48) | (99) | (96)
Amortization of prior service credit and net gains recognized during the period in net periodic benefit cost | Reclassification out of Accumulated Other Comprehensive Income |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Total reclassifications | (445) | (357) | (894) | (714)
Amortization of prior service credit and net gains recognized during the period in net periodic benefit cost | Hawaiian Electric Company, Inc. and Subsidiaries | Reclassification out of Accumulated Other Comprehensive Income |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Total reclassifications | (505) | (470) | (1,013) | (940)
Impact of D&Os of the PUC included in regulatory assets | Reclassification out of Accumulated Other Comprehensive Income |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Total reclassifications | 459 | 426 | 918 | 851
Impact of D&Os of the PUC included in regulatory assets | Hawaiian Electric Company, Inc. and Subsidiaries | Reclassification out of Accumulated Other Comprehensive Income |  |  |  |
Reclassifications out of accumulated other comprehensive income/(loss) |  |  |  |
Total reclassifications | $ 459 | $ 426 | $ 918 | $ 851

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