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Share-based compensation (Tables) | 3 Months Ended
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Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of share-based compensation expense and related income tax benefit | Share-based compensation expense and the related income tax benefit were as follows:
|  | Three months ended March 31
(in millions) |  | 2015 |  | 2014
HEI consolidated |  |  |  |
Share-based compensation expense 1 |  | $ | 1.8 |  |  | $ | 2.4 |
Income tax benefit |  | 0.6 |  |  | 0.8 |
Hawaiian Electric consolidated |  |  |  |
Share-based compensation expense 1 |  | 0.5 |  |  | 0.7 |
Income tax benefit |  | 0.2 |  |  | 0.3 |
1 | $0.04 million and $0.04 million of this share-based compensation expense was capitalized in the three months ended March 31, 2015 and 2014, respectively.
Schedule of stock appreciation rights by grant year | SARs activity and statistics were as follows:
| Three months ended March 31
(dollars in thousands, except prices) | 2015 |  | 2014
Shares underlying SARS exercised | 80,000 |  |  | -
Weighted-average price of shares exercised | $ | 26.18 |  |  | -
Intrinsic value of shares exercised 1 | 502 |  |  | -
Tax benefit realized for the deduction of exercises | 162 |  |  | -
1 Intrinsic value is the amount by which the fair market value of the underlying stock and the related dividend equivalent rights exceeds the exercise price of the right.
Schedule of restricted stock units | Information about HEI’s grants of restricted stock units was as follows:
| Three months ended March 31
| 2015 |  | 2014
| Shares |  | (1) |  | Shares |  | (1)
Outstanding, beginning of period | 261,235 |  |  | $ | 25.77 |  |  | 288,151 |  |  | $ | 25.17 |
Granted | 84,294 |  |  | 33.74 |  |  | 115,036 |  |  | 25.19 |
Vested | (79,219 | ) |  | 25.77 |  |  | (71,029 | ) |  | 25.79 |
Forfeited | (4,619 | ) |  | 25.83 |  |  | — |  |  | — |
Outstanding, end of period | 261,691 |  |  | $ | 28.33 |  |  | 332,158 |  |  | $ | 25.04 |
Total weighted-average grant-date fair value of shares granted ($ millions) | $ | 2.8 |  |  |  |  | $ | 2.9 |  |  |
(1) | Weighted-average grant-date fair value per share based on the average price of HEI common stock on the date of grant.
Schedule of Long-Term Incentive Plan (LTIP) linked to total return to shareholders | Information about HEI’s LTIP grants linked to TRS was as follows:
| Three months ended March 31
| 2015 |  | 2014
| Shares |  | (1) |  | Shares |  | (1)
Outstanding, beginning of period | 257,956 |  |  | $ | 28.45 |  |  | 232,127 |  |  | $ | 32.88 |
Granted (target level) | — |  |  | — |  |  | 96,793 |  |  | 22.95 |
Vested (issued or unissued and cancelled) | (75,915 | ) |  | 30.71 |  |  | (70,189 | ) |  | 35.46 |
Forfeited | (13,264 | ) |  | 26.00 |  |  | (488 | ) |  | 32.13 |
Outstanding, end of period | 168,777 |  |  | $ | 27.63 |  |  | 258,243 |  |  | $ | 28.46 |
Total weighted-average grant-date fair value of shares granted ($ millions) | $ | — |  |  |  |  | $ | 2.2 |  |  |
(1) | Weighted-average grant-date fair value per share determined using a Monte Carlo simulation model.
Schedule of assumptions used to determine the fair value of Long-Term Incentive Plan (LTIP) linked to total return to shareholders (TRS) | The following table summarizes the assumptions used to determine the fair value of the LTIP awards linked to TRS and the resulting fair value of LTIP awards granted:
| 2014
Risk-free interest rate | 0.66 | %
Expected life in years | 3 |
Expected volatility | 17.8 | %
Range of expected volatility for Peer Group | 12.4% to 23.3% |
Grant date fair value (per share) | $ | 22.95 |
Schedule of Long-Term Incentive Plan (LTIP) linked to other performance conditions | Information about HEI’s LTIP awards payable in shares linked to other performance conditions was as follows:
| Three months ended March 31
| 2015 |  | 2014
| Shares |  | (1) |  | Shares |  | (1)
Outstanding, beginning of period | 364,731 |  |  | $ | 26.01 |  |  | 296,843 |  |  | $ | 26.14 |
Granted (target level) | — |  |  | — |  |  | 128,873 |  |  | 25.19 |
Vested (issued) | (121,249 | ) |  | 26.05 |  |  | (65,089 | ) |  | 24.95 |
Forfeited | (13,263 | ) |  | 25.72 |  |  | (557 | ) |  | 26.55 |
Outstanding, end of period | 230,219 |  |  | $ | 26.00 |  |  | 360,070 |  |  | $ | 26.01 |
Total weighted-average grant-date fair value of shares granted (at target performance levels) ($ millions) | $ | — |  |  |  |  | $ | 3.2 |  |  |
(1) | Weighted-average grant-date fair value per share based on the average price of HEI common stock on the date of grant.

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- Definition Tabular disclosure of the number and weighted-average grant date fair value of shares that were outstanding at the beginning and end of the year, and the number of Long-Term Incentive Plan awards that were granted, vested, or forfeited during the year that were linked to other performance conditions. + References No definition available. + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for long-term incentive plan awards that were outstanding at the beginning and end of the year, and the number that were granted, vested, or forfeited during the year. + References No definition available. + Details
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- Definition Tabular disclosure of stock appreciation rights exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under stock appreciation rights, weighted-average exercise price and the remaining contractual option terms. + References No definition available. + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of Long-Term Incentive Plan linked to total return to shareholders, including, but not limited to: (a) expected term of awards, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References No definition available. + Details
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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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