XML 42 R26.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Shareholders' equity (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2018
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 (losses) on derivatives |  | Retirement benefit plans |  | AOCI
Balance, December 31, 2017 | $ | (14,951 | ) |  | $ | — |  |  | $ | (26,990 | ) |  | $ | (41,941 | ) |  | $ | — |  |  | $ | (1,219 | ) |  | $ | (1,219 | )
Current period other comprehensive income (loss) | (13,297 | ) |  | — |  |  | 524 |  |  | (12,773 | ) |  | — |  |  | 31 |  |  | 31 |
Balance, March 31, 2018 | $ | (28,248 | ) |  | $ | — |  |  | $ | (26,466 | ) |  | $ | (54,714 | ) |  | $ | — |  |  | $ | (1,188 | ) |  | $ | (1,188 | )
Balance, December 31, 2016 | $ | (7,931 | ) |  | $ | (454 | ) |  | $ | (24,744 | ) |  | $ | (33,129 | ) |  | $ | (454 | ) |  | $ | 132 |  |  | $ | (322 | )
Current period other comprehensive income | 223 |  |  | 454 |  |  | 308 |  |  | 985 |  |  | 454 |  |  | 5 |  |  | 459 |
Balance, March 31, 2017 | $ | (7,708 | ) |  | $ | — |  |  | $ | (24,436 | ) |  | $ | (32,144 | ) |  | $ | — |  |  | $ | 137 |  |  | $ | 137 |
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) |  | 2018 |  | 2017 |  | Statements of Income / Balance Sheets
HEI consolidated |  |  |  |  |  |
Derivatives qualifying as cash flow hedges: |  |  |  |  |  |  |  |
Window forward contracts |  | $ | — |  |  | $ | 454 |  |  | Property, plant and equipment-electric utilities
Retirement benefit plans: |  |  |  |  |  |  |  |
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost |  | 5,146 |  |  | 3,921 |  |  | See Note 8 for additional details
Impact of D&Os of the PUC included in regulatory assets |  | (4,622 | ) |  | (3,613 | ) |  | See Note 8 for additional details
Total reclassifications |  | $ | 524 |  |  | $ | 762 |  |  |
Hawaiian Electric consolidated |  |  |  |  |  |
Derivatives qualifying as cash flow hedges: |  |  |  |  |  |
Window forward contracts |  | $ | — |  |  | $ | 454 |  |  | Property, plant and equipment
Retirement benefit plans: |  |  |  |  |  |  |
Amortization of prior service credit and net losses recognized during the period in net periodic benefit cost |  | 4,653 |  |  | 3,618 |  |  | See Note 8 for additional details
Impact of D&Os of the PUC included in regulatory assets |  | (4,622 | ) |  | (3,613 | ) |  | See Note 8 for additional details
Total reclassifications |  | $ | 31 |  |  | $ | 459 |  |  |

X
- References No definition available. + Details
Name: | us-gaap_EquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss). + References No definition available. + Details
Name: | us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- 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
Name: | us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration