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Shareholders' equity (Tables) | 3 Months Ended
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Mar. 31, 2020
Equity [Abstract] |
Schedule of accumulated other comprehensive income | 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, 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) |  |  |
Balance, December 31, 2018 | $ | (24,423) |  |  | $ | (436) |  |  | $ | (25,751) |  |  | $ | (50,610) |  |  |  |  | $ | 99 |  |  |
Current period other comprehensive income (loss) | 9,439 |  |  | (403) |  |  | 205 |  |  | 9,241 |  |  |  |  | 24 |  |  |
Balance, March 31, 2019 | $ | (14,984) |  |  | $ | (839) |  |  | $ | (25,546) |  |  | $ | (41,369) |  |  |  |  | $ | 123 |  |  |
Schedule of reclassifications out of accumulated other comprehensive income/(loss) | Reclassifications out of AOCI were as follows:
|  |  |  |  |  | Amount reclassified from AOCI |  |  |  |
|  |  |  |  |  | Three months ended March 31 |  |  |  | Affected line item in the
(in thousands) |  |  |  |  |  | 2020 |  | 2019 |  | Statements of Income / Balance Sheets
HEI consolidated |  |  |  |  |  |  |  |  |  |
Retirement benefit plans: |  |  |  |  |  |  |  |  |  |
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost |  |  |  |  |  | $ | 5,706 |  |  | $ | 2,503 |  |  | See Note 8 for additional details
Impact of D&Os of the PUC included in regulatory assets |  |  |  |  |  | (5,158) |  |  | (2,298) |  |  | See Note 8 for additional details
Total reclassifications |  |  |  |  |  | $ | 548 |  |  | $ | 205 |  |  |
Hawaiian Electric consolidated |  |  |  |  |  |  |  |  |  |
Retirement benefit plans: |  |  |  |  |  |  |  |  |  |
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost |  |  |  |  |  | $ | 5,184 |  |  | $ | 2,322 |  |  | See Note 8 for additional details
Impact of D&Os of the PUC included in regulatory assets |  |  |  |  |  | (5,158) |  |  | (2,298) |  |  | See Note 8 for additional details
Total reclassifications |  |  |  |  |  | $ | 26 |  |  | $ | 24 |  |  |

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- Definition Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss). + References No definition available. + Details
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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580 + Details
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