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Shareholders' equity | 12 Months Ended
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Dec. 31, 2018
Equity [Abstract] |
Shareholders' equity |
Note 7 · Shareholders’ equity
Reserved shares. As of December 31, 2018, HEI had reserved a total of 10,029,398 shares of common stock for future issuance under the HEI Dividend Reinvestment and Stock Purchase Plan (DRIP), the Hawaiian Electric Industries Retirement Savings Plan (HEIRSP), the HEI 2011 Nonemployee Director Stock Plan, the ASB 401(k) Plan and the 2010 Executive Incentive Plan. 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 |  | Unrealized gains (losses) on derivatives |  | Retirement benefit plans |  | AOCI
Balance, December 31, 2015 | $ | (1,872 | ) |  | $ | (54 | ) |  | $ | (24,336 | ) |  | $ | (26,262 | ) |  | $ | — |  |  | $ | 925 |  |  | $ | 925 |
Current period other comprehensive loss, net of taxes | (6,059 | ) |  | (400 | ) |  | (408 | ) |  | (6,867 | ) |  | (454 | ) |  | (793 | ) |  | (1,247 | )
Balance, December 31, 2016 | (7,931 | ) |  | (454 | ) |  | (24,744 | ) |  | (33,129 | ) |  | (454 | ) |  | 132 |  |  | (322 | )
Current period other comprehensive income (loss), net of taxes | (4,370 | ) |  | 454 |  |  | 2,544 |  |  | (1,372 | ) |  | 454 |  |  | (1,142 | ) |  | (688 | )
Reclass of AOCI for tax rate reduction impact | (2,650 | ) |  | — |  |  | (4,790 | ) |  | (7,440 | ) |  | — |  |  | (209 | ) |  | (209 | )
Balance, December 31, 2017 | (14,951 | ) |  | — |  |  | (26,990 | ) |  | (41,941 | ) |  | — |  |  | (1,219 | ) |  | (1,219 | )
Current period other comprehensive income (loss), net of taxes | (9,472 | ) |  | (436 | ) |  | 1,239 |  |  | (8,669 | ) |  | — |  |  | 1,318 |  |  | 1,318 |
Balance, December 31, 2018 | $ | (24,423 | ) |  | $ | (436 | ) |  | $ | (25,751 | ) |  | $ | (50,610 | ) |  | $ | — |  |  | $ | 99 |  |  | $ | 99 |
Reclassifications out of AOCI were as follows:
|  | Amount reclassified from AOCI |  | Affected line item in the Statement of
Years ended December 31 |  | 2018 |  | 2017 |  | 2016 |  | Income/Balance Sheet
(in thousands) |  |  |  |  |  |  |  |
HEI consolidated |  |  |  |  |  |  |  |
Net realized gains on securities included in net income |  | $ | — |  |  | $ | — |  |  | $ | (360 | ) |  | Revenues-bank (gains on sale of investment securities, net)
Derivatives qualifying as cash flow hedges: |  |  |  |  |  |  |  |  |  |
Window forward contracts |  | — |  |  | 454 |  |  | (173 | ) |  | Property, plant and equipment-electric utilities (2017); Revenues-electric utilities (gains on window forward contracts (2016)
Interest rate contracts (settled in 2011) |  | — |  |  | — |  |  | 54 |  |  | Interest expense
Retirement benefit plans: |  |  |  |  |  |  |  |  |  |  |
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost |  | 21,015 |  |  | 15,737 |  |  | 14,518 |  |  | See Note 9 for additional details
Impact of D&Os of the PUC included in regulatory assets |  | 8,325 |  |  | (78,724 | ) |  | 28,584 |  |  | See Note 9 for additional details
Total reclassifications |  | $ | 29,340 |  |  | $ | (62,533 | ) |  | $ | 42,623 |  |  |
Hawaiian Electric consolidated |  |  |  |  |  |  |  |
Derivatives qualifying as cash flow hedges |  |  |  |  |  |  |  |
Window forward contracts |  | $ | — |  |  | $ | 454 |  |  | $ | (173 | ) |  | Property, plant and equipment (2017); Revenues (gains on window forward contracts (2016))
Retirement benefit plans: |  |  |  |  |  |  |  |  |  |  |
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost |  | 19,012 |  |  | 14,477 |  |  | 13,254 |  |  | See Note 9 for additional details
Impact of D&Os of the PUC included in regulatory assets |  | 8,325 |  |  | (78,724 | ) |  | 28,584 |  |  | See Note 9 for additional details
Total reclassifications |  | $ | 27,337 |  |  | $ | (63,793 | ) |  | $ | 41,665 |  |  |

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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://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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