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Shareholders' equity (Tables) | 6 Months Ended
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Jun. 30, 2016
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 |  | Unrealized gains on derivatives |  | Retirement benefit plans |  | AOCI
Balance, December 31, 2015 | $ | (1,872 | ) |  | $ | (54 | ) |  | $ | (24,336 | ) |  | $ | (26,262 | ) |  | $ | — |  |  | $ | 925 |  |  | $ | 925 |
Current period other comprehensive income | 9,984 |  |  | 311 |  |  | 613 |  |  | 10,908 |  |  | 257 |  |  | 4 |  |  | 261 |
Balance, June 30, 2016 | $ | 8,112 |  |  | $ | 257 |  |  | $ | (23,723 | ) |  | $ | (15,354 | ) |  | $ | 257 |  |  | $ | 939 |  |  | $ | 1,186 |
Balance, December 31, 2014 | $ | 462 |  |  | $ | (289 | ) |  | $ | (27,551 | ) |  | $ | (27,378 | ) |  | $ | — |  |  | $ | 45 |  |  | $ | 45 |
Current period other comprehensive income | (243 | ) |  | 118 |  |  | 1,056 |  |  | 931 |  |  | — |  |  | 7 |  |  | 7 |
Balance, June 30, 2015 | $ | 219 |  |  | $ | (171 | ) |  | $ | (26,495 | ) |  | $ | (26,447 | ) |  | $ | — |  |  | $ | 52 |  |  | $ | 52 |
Schedule of reclassifications out of accumulated other comprehensive income/(loss) | Reclassifications out of AOCI were as follows:
|  | Amount reclassified from AOCI |  |
|  | Three months ended June 30 |  | Six months ended June 30 |  | Affected line item in the
(in thousands) |  | 2016 |  | 2015 |  | 2016 |  | 2015 |  | Statement of Income
HEI consolidated |  |  |  |  |  |  |  |  |  |
Net realized gains on securities |  | $ | (360 | ) |  | $ | — |  |  | $ | (360 | ) |  | $ | — |  |  | Revenues-bank (net gains on sales of securities)
Derivatives qualified as cash flow hedges |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate contracts (settled in 2011) |  | — |  |  | 59 |  |  | 54 |  |  | 118 |  |  | Interest expense
Retirement benefit plan items |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost |  | 3,698 |  |  | 5,780 |  |  | 7,236 |  |  | 11,239 |  |  | See Note 6 for additional details
Less: reclassification adjustment for impact of D&Os of the PUC included in regulatory assets |  | (3,401 | ) |  | (5,272 | ) |  | (6,623 | ) |  | (10,183 | ) |  | See Note 6 for additional details
Total reclassifications |  | $ | (63 | ) |  | $ | 567 |  |  | $ | 307 |  |  | $ | 1,174 |  |  |
Hawaiian Electric consolidated |  |  |  |  |  |  |  |  |  |
Retirement benefit plan items |  |  |  |  |  |  |  |  |  |  |  |
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost |  | $ | 3,391 |  |  | $ | 5,257 |  |  | $ | 6,627 |  |  | $ | 10,190 |  |  | See Note 6 for additional details
Less: reclassification adjustment for impact of D&Os of the PUC included in regulatory assets |  | (3,401 | ) |  | (5,272 | ) |  | (6,623 | ) |  | (10,183 | ) |  | See Note 6 for additional details
Total reclassifications |  | $ | (10 | ) |  | $ | (15 | ) |  | $ | 4 |  |  | $ | 7 |  |  |

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=66004124&loc=SL7669686-108580 + Details
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