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Electric utility segment - Condensed consolidating statement of changes in common stock equity (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Mar. 31, 2022 | Jun. 30, 2021 | Mar. 31, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Increase (decrease) in stockholders' equity |  |  |  |  |  |
Beginning balance | $ 2,303,642 | $ 2,390,884 | $ 2,321,293 | $ 2,337,502 | $ 2,390,884 | $ 2,337,502
Net income for common stock | 52,541 | 69,167 | 63,872 | 64,358 | 121,708 | 128,230
Other comprehensive income, net of taxes | (87,840) | (117,159) | 16,472 | (44,016) | (204,999) | (27,544)
Common stock dividends | (38,301) | (38,301) | (37,155) | (37,156) |  |
Ending balance | 2,233,504 | 2,303,642 | 2,367,329 | 2,321,293 | 2,233,504 | 2,367,329
Hawaiian Electric Consolidated |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |
Beginning balance | 2,276,884 | 2,261,899 | 2,157,385 | 2,141,918 | 2,261,899 | 2,141,918
Net income for common stock | 44,135 | 46,409 | 41,901 | 43,358 | 90,544 | 85,259
Other comprehensive income, net of taxes | 51 | 51 | 35 | 34 | 102 | 69
Common stock dividends | (31,475) | (31,475) | (27,925) | (27,925) | (62,950) | (55,850)
Ending balance | 2,289,595 | 2,276,884 | 2,171,396 | 2,157,385 | 2,289,595 | 2,171,396
Hawaiian Electric Consolidated | Reportable Legal Entities | Hawaiian Electric |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |
Beginning balance |  | 2,261,899 |  | 2,141,918 | 2,261,899 | 2,141,918
Net income for common stock | 44,135 |  | 41,901 |  | 90,544 | 85,259
Other comprehensive income, net of taxes | 51 |  | 35 |  | 102 | 69
Common stock dividends |  |  |  |  | (62,950) | (55,850)
Ending balance | 2,289,595 |  | 2,171,396 |  | 2,289,595 | 2,171,396
Hawaiian Electric Consolidated | Reportable Legal Entities | Hawaii Electric Light |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |
Beginning balance |  | 332,900 |  | 317,451 | 332,900 | 317,451
Net income for common stock | 5,658 |  | 5,607 |  | 13,035 | 12,299
Other comprehensive income, net of taxes | 2 |  | 0 |  | 2 | 1
Common stock dividends |  |  |  |  | (8,200) | (7,300)
Ending balance | 337,737 |  | 322,451 |  | 337,737 | 322,451
Hawaiian Electric Consolidated | Reportable Legal Entities | Maui Electric |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |
Beginning balance |  | 343,260 |  | 309,363 | 343,260 | 309,363
Net income for common stock | 6,579 |  | 5,137 |  | 12,863 | 10,955
Other comprehensive income, net of taxes | 1 |  | 0 |  | 1 | 0
Common stock dividends |  |  |  |  | (7,600) | (7,550)
Ending balance | 348,524 |  | 312,768 |  | 348,524 | 312,768
Hawaiian Electric Consolidated | Reportable Legal Entities | Other subsidiaries |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |
Beginning balance |  | 77 |  | 77 | 77 | 77
Net income for common stock | 0 |  | 0 |  | 0 | 0
Other comprehensive income, net of taxes | 0 |  | 0 |  | 0 | 0
Ending balance | 77 |  | 77 |  | 77 | 77
Hawaiian Electric Consolidated | Consolidating adjustments |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |
Beginning balance |  | $ (676,237) |  | $ (626,891) | (676,237) | (626,891)
Net income for common stock | (12,237) |  | (10,744) |  | (25,898) | (23,254)
Other comprehensive income, net of taxes | (3) |  | 0 |  | (3) | (1)
Common stock dividends |  |  |  |  | 15,800 | 14,850
Ending balance | $ (686,338) |  | $ (635,296) |  | $ (686,338) | $ (635,296)

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