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v3.23.3

Shareholders' equity - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Sep. 30, 2023 | Sep. 30, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance | $ 2,249,377 | $ 2,237,955 | $ 2,202,499 | $ 2,233,504 | $ 2,303,642 | $ 2,390,884 | $ 2,202,499 | $ 2,390,884
Current period other comprehensive income (loss) | (34,875) | (7,609) | 20,488 | (96,012) | (87,840) | (117,159) | (21,996) | (301,011)
Ending balance | 2,224,354 | 2,249,377 | 2,237,955 | 2,162,922 | 2,233,504 | 2,303,642 | 2,224,354 | 2,162,922
AOCI |  |  |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance | (323,149) | (315,540) | (336,028) | (257,532) | (169,692) | (52,533) | (336,028) | (52,533)
Current period other comprehensive income (loss) | (34,875) | (7,609) | 20,488 | (96,012) | (87,840) | (117,159) |  |
Ending balance | (358,024) | (323,149) | (315,540) | (353,544) | (257,532) | (169,692) | (358,024) | (353,544)
Net unrealized gains (losses) on securities |  |  |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | (328,904) |  |  | (32,037) | (328,904) | (32,037)
Current period other comprehensive income (loss) |  |  |  |  |  |  | (21,330) | (308,229)
Ending balance | (350,234) |  |  | (340,266) |  |  | (350,234) | (340,266)
Unrealized gains (losses) on derivatives |  |  |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | 1,991 |  |  | (3,638) | 1,991 | (3,638)
Current period other comprehensive income (loss) |  |  |  |  |  |  | (827) | 6,561
Ending balance | 1,164 |  |  | 2,923 |  |  | 1,164 | 2,923
Retirement benefit plans |  |  |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | (9,115) |  |  | (16,858) | (9,115) | (16,858)
Current period other comprehensive income (loss) |  |  |  |  |  |  | 161 | 657
Ending balance | (8,954) |  |  | (16,201) |  |  | (8,954) | (16,201)
Hawaiian Electric Company, Inc. and Subsidiaries |  |  |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance | 2,371,889 | 2,358,884 | 2,344,170 | 2,289,595 | 2,276,884 | 2,261,899 | 2,344,170 | 2,261,899
Current period other comprehensive income (loss) | (77) | (44) | (45) | 108 | 51 | 51 | (166) | 210
Ending balance | 2,383,023 | 2,371,889 | 2,358,884 | 2,307,992 | 2,289,595 | 2,276,884 | 2,383,023 | 2,307,992
Hawaiian Electric Company, Inc. and Subsidiaries | AOCI |  |  |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance | 2,772 | 2,816 | 2,861 | (3,178) | (3,229) | (3,280) | 2,861 | (3,280)
Current period other comprehensive income (loss) | (77) | (44) | (45) | 108 | 51 | 51 |  |
Ending balance | 2,695 | $ 2,772 | 2,816 | (3,070) | $ (3,178) | (3,229) | 2,695 | (3,070)
Hawaiian Electric Company, Inc. and Subsidiaries | Retirement benefit plans |  |  |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |  |  |
Beginning balance |  |  | $ 2,861 |  |  | $ (3,280) | 2,861 | (3,280)
Current period other comprehensive income (loss) |  |  |  |  |  |  | (166) | 210
Ending balance | $ 2,695 |  |  | $ (3,070) |  |  | $ 2,695 | $ (3,070)

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