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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, 2019 | Mar. 31, 2019 | Jun. 30, 2018 | Mar. 31, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Increase (decrease) in stockholders' equity |  |  |  |  |  |
Beginning Balance | $ 2,183,515 | $ 2,162,280 | $ 2,091,777 | $ 2,097,386 | $ 2,162,280 | $ 2,097,386
Net income for common stock | 42,512 | 45,688 | 46,054 | 40,247 | 88,200 | 86,301
Other comprehensive income, net of taxes | 13,699 | 9,241 | (3,825) | (12,773) | 22,940 | (16,598)
Common stock dividends | (34,860) | (34,860) | (33,740) | (33,741) |  |
Ending Balance | 2,208,586 | 2,183,515 | 2,103,018 | 2,091,777 | 2,208,586 | 2,103,018
Consolidating adjustments |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |
Beginning Balance | (582,374) | (576,838) | (559,511) | (557,013) | (576,838) | (557,013)
Net income for common stock | (8,086) | (11,849) | (9,080) | (9,325) | (19,935) | (18,405)
Other comprehensive income, net of taxes | (1) | (1) | (1) | 0 | (2) | (1)
Common stock dividends | 6,312 | 6,312 | 6,827 | 6,827 |  |
Common stock issuance expenses |  | 2 | 1 | 0 |  |
Ending Balance | (584,149) | (582,374) | (561,764) | (559,511) | (584,149) | (561,764)
Hawaiian Electric (parent only) | Reportable Legal Entities |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |
Beginning Balance | 1,964,478 | 1,957,641 | 1,846,955 | 1,845,283 | 1,957,641 | 1,845,283
Net income for common stock | 32,574 | 32,126 | 31,169 | 27,475 | 64,700 | 58,644
Other comprehensive income, net of taxes | 23 | 24 | 26 | 31 | 47 | 57
Common stock dividends | (25,313) | (25,313) | (25,826) | (25,826) |  |
Common stock issuance expenses |  | 0 | 0 | (8) |  |
Ending Balance | 1,971,762 | 1,964,478 | 1,852,324 | 1,846,955 | 1,971,762 | 1,852,324
HELCO | Reportable Legal Entities |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |
Beginning Balance | 298,497 | 295,874 | 288,927 | 286,647 | 295,874 | 286,647
Net income for common stock | 4,666 | 5,169 | 3,763 | 6,101 | 9,835 | 9,864
Other comprehensive income, net of taxes | 1 | 1 | 1 | 0 | 2 | 1
Common stock dividends | (2,545) | (2,545) | (3,823) | (3,821) |  |
Common stock issuance expenses |  | (2) | (3) | 0 |  |
Ending Balance | 300,619 | 298,497 | 288,865 | 288,927 | 300,619 | 288,865
Maui Electric | Reportable Legal Entities |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |
Beginning Balance | 283,776 | 280,863 | 270,483 | 270,265 | 280,863 | 270,265
Net income for common stock | 3,420 | 6,680 | 5,317 | 3,224 | 10,100 | 8,541
Other comprehensive income, net of taxes | 0 | 0 | 0 | 0 | 0 | 0
Common stock dividends | (3,767) | (3,767) | (3,004) | (3,006) |  |
Common stock issuance expenses |  | 0 | 2 | 0 |  |
Ending Balance | 283,429 | 283,776 | 272,798 | 270,483 | 283,429 | 272,798
Other subsidiaries | Reportable Legal Entities |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |
Beginning Balance | 101 | 101 | 101 | 101 | 101 | 101
Net income for common stock | 0 | 0 | 0 | 0 | 0 | 0
Other comprehensive income, net of taxes | 0 | 0 | 0 | 0 | 0 | 0
Common stock dividends | 0 | 0 | 0 | 0 |  |
Common stock issuance expenses |  | 0 | 0 | 0 |  |
Ending Balance | 101 | 101 | 101 | 101 | 101 | 101
Hawaiian Electric Company, Inc. and Subsidiaries |  |  |  |  |  |
Increase (decrease) in stockholders' equity |  |  |  |  |  |
Beginning Balance | 1,964,478 | 1,957,641 | 1,846,955 | 1,845,283 | 1,957,641 | 1,845,283
Net income for common stock | 32,574 | 32,126 | 31,169 | 27,475 | 64,700 | 58,644
Other comprehensive income, net of taxes | 23 | 24 | 26 | 31 | 47 | 57
Common stock dividends | (25,313) | (25,313) | (25,826) | (25,826) |  |
Common stock issuance expenses |  | 0 | 0 | (8) |  |
Ending Balance | $ 1,971,762 | $ 1,964,478 | $ 1,852,324 | $ 1,846,955 | $ 1,971,762 | $ 1,852,324

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