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Shareholders' equity | 3 Months Ended
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Mar. 31, 2021
Equity [Abstract] |
Shareholders' equity | Shareholders’ equity Accumulated other comprehensive income/(loss). Changes in the balances of each component of accumulated other comprehensive income/(loss) (AOCI) were as follows:
| HEI Consolidated |  |  |  | Hawaiian Electric Consolidated |  |
(in thousands) | Net unrealized gains (losses) on securities |  | Unrealized gains (losses) on derivatives |  | Retirement benefit plans |  | AOCI |  |  |  | AOCI-Retirement benefit plans |  |
Balance, December 31, 2020 | $ | 19,986 |  |  | $ | (3,363) |  |  | $ | (17,887) |  |  | $ | (1,264) |  |  |  |  | $ | (2,919) |  |  |
Current period other comprehensive income (loss) | (45,777) |  |  | 1,562 |  |  | 199 |  |  | (44,016) |  |  |  |  | 34 |  |  |
Balance, March 31, 2021 | $ | (25,791) |  |  | $ | (1,801) |  |  | $ | (17,688) |  |  | $ | (45,280) |  |  |  |  | $ | (2,885) |  |  |
Balance, December 31, 2019 | $ | 2,481 |  |  | $ | (1,613) |  |  | $ | (20,907) |  |  | $ | (20,039) |  |  |  |  | $ | (1,279) |  |  |
Current period other comprehensive income (loss) | 19,448 |  |  | (1,784) |  |  | 548 |  |  | 18,212 |  |  |  |  | 26 |  |  |
Balance, March 31, 2020 | $ | 21,929 |  |  | $ | (3,397) |  |  | $ | (20,359) |  |  | $ | (1,827) |  |  |  |  | $ | (1,253) |  |  |
Reclassifications out of AOCI were as follows:
|  |  |  |  |  | Amount reclassified from AOCI |  | Affected line item in the Statements of Income / Balance Sheets
Three months ended March 31 |  |  |  | 2021 |  | 2020 |
(in thousands) |  |  |  |  |  |  |  |  |  |
HEI consolidated |  |  |  |  |  |  |  |  |  |
Net realized gains on securities included in net income |  |  |  |  |  | $ | (387) |  |  | $ | — |  |  | Gain on sale of investment securities, net
Retirement benefit plans: |  |  |  |  |  |  |  |  |  |
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost |  |  |  |  |  | 6,010 |  |  | 5,706 |  |  | See Note 8 for additional details
Impact of D&Os of the PUC included in regulatory assets |  |  |  |  |  | (5,811) |  |  | (5,158) |  |  | See Note 8 for additional details
Total reclassifications |  |  |  |  |  | $ | (188) |  |  | $ | 548 |  |  |
Hawaiian Electric consolidated |  |  |  |  |  |  |  |
Retirement benefit plans: |  |  |  |  |  |  |  |  |  |
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost |  |  |  |  |  | $ | 5,845 |  |  | $ | 5,184 |  |  | See Note 8 for additional details
Impact of D&Os of the PUC included in regulatory assets |  |  |  |  |  | (5,811) |  |  | (5,158) |  |  | See Note 8 for additional details
Total reclassifications |  |  |  |  |  | $ | 34 |  |  | $ | 26 |  |  |

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(e)(1)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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