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Earnings per share and shareholders' equity (Tables) | 9 Months Ended
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Sep. 30, 2014
Equity [Abstract] |
Schedule of earnings per share | Earnings per share. Under the two-class method of computing earnings per share (EPS), EPS was comprised as follows for both participating securities and unrestricted common stock:
| Three months ended September 30 |  | Nine months ended September 30
| 2014 | 2013 |  | 2014 |  | 2013
| Basic |  | Diluted |  | Basic |  | Diluted |  | Basic |  | Diluted |  | Basic |  | Diluted
Distributed earnings | $ | 0.31 |  |  | $ | 0.31 |  |  | $ | 0.31 |  |  | $ | 0.31 |  |  | $ | 0.93 |  |  | $ | 0.93 |  |  | $ | 0.93 |  |  | $ | 0.93 |
Undistributed earnings | 0.16 |  |  | 0.15 |  |  | 0.18 |  |  | 0.17 |  |  | 0.40 |  |  | 0.39 |  |  | 0.31 |  |  | 0.30 |
| $ | 0.47 |  |  | $ | 0.46 |  |  | $ | 0.49 |  |  | $ | 0.48 |  |  | $ | 1.33 |  |  | $ | 1.32 |  |  | $ | 1.24 |  |  | $ | 1.23 |
Schedule of accumulated other comprehensive income | 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 losses on derivatives |  | Retirement benefit plans |  | AOCI |  | AOCI -retirement benefit plans
Balance, December 31, 2013 | $ | (3,663 | ) |  | $ | (525 | ) |  | $ | (12,562 | ) |  | $ | (16,750 | ) |  | $ | 608 |
Current period other comprehensive income | 1,691 |  |  | 177 |  |  | 888 |  |  | 2,756 |  |  | 32 |
Balance, September 30, 2014 | $ | (1,972 | ) |  | $ | (348 | ) |  | $ | (11,674 | ) |  | $ | (13,994 | ) |  | $ | 640 |
Balance, December 31, 2012 | $ | 10,761 |  |  | $ | (760 | ) |  | $ | (36,424 | ) |  | $ | (26,423 | ) |  | $ | (970 | )
Current period other comprehensive income (loss) | (11,462 | ) |  | 177 |  |  | 2,022 |  |  | (9,263 | ) |  | 52 |
Balance, September 30, 2013 | $ | (701 | ) |  | $ | (583 | ) |  | $ | (34,402 | ) |  | $ | (35,686 | ) |  | $ | (918 | )
Schedule of reclassifications out of accumulated other comprehensive income/(loss) | Reclassifications out of AOCI were as follows:
|  | Amount reclassified from AOCI |  |
|  | Three months ended September 30 |  | Nine months ended September 30 |  |
(in thousands) |  | 2014 |  | 2013 |  | 2014 |  | 2013 |  | Affected line item in the Statement of Income
HEI consolidated |  |  |  |  |  |  |  |  |  |
Net realized gains on securities |  | $ | — |  |  | $ | — |  |  | $ | (1,715 | ) |  | $ | (738 | ) |  | Revenues-bank (net gains on sales of securities)
Derivatives qualified as cash flow hedges |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate contracts (settled in 2011) |  | 59 |  |  | 59 |  |  | 177 |  |  | 177 |  |  | Interest expense
Retirement benefit plan items |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of transition obligation, prior service credit and net losses recognized during the period in net periodic benefit cost |  | 2,829 |  |  | 5,789 |  |  | 8,515 |  |  | 17,490 |  |  | See Note 5 for additional details
Less: reclassification adjustment for impact of D&Os of the PUC included in regulatory assets |  | (2,542 | ) |  | (5,156 | ) |  | (7,627 | ) |  | (15,468 | ) |  | See Note 5 for additional details
Total reclassifications |  | $ | 346 |  |  | $ | 692 |  |  | $ | (650 | ) |  | $ | 1,461 |  |  |
Hawaiian Electric consolidated |  |  |  |  |  |  |  |  |  |
Retirement benefit plan items |  |  |  |  |  |  |  |  |  |  |  |
Amortization of transition obligation, prior service credit and net losses recognized during the period in net periodic benefit cost |  | $ | 2,552 |  |  | $ | 5,173 |  |  | $ | 7,659 |  |  | $ | 15,520 |  |  | See Note 5 for additional details
Less: reclassification adjustment for impact of D&Os of the PUC included in regulatory assets |  | (2,542 | ) |  | (5,156 | ) |  | (7,627 | ) |  | (15,468 | ) |  | See Note 5 for additional details
Total reclassifications |  | $ | 10 |  |  | $ | 17 |  |  | $ | 32 |  |  | $ | 52 |  |  |

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