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Share-based compensation
 6 Months Ended
Jun. 30, 2021
Share-based Payment Arrangement [Abstract]  
Share-based compensation Share-based compensation
Under the 2010 Equity and Incentive Plan, as amended, HEI can issue shares of common stock as incentive compensation to selected employees in the form of stock options, stock appreciation rights, restricted shares, restricted stock units, performance shares and other share-based and cash-based awards. The 2010 Equity and Incentive Plan (original EIP) was amended and restated effective March 1, 2014 (EIP) and an additional 1.5 million shares were added to the shares available for issuance under these programs.
As of June 30, 2021, approximately 2.9 million shares remained available for future issuance under the terms of the EIP, assuming recycling of shares withheld to satisfy minimum statutory tax liabilities relating to EIP awards, including an estimated 0.8 million shares that could be issued upon the vesting of outstanding restricted stock units and the achievement of performance goals for awards outstanding under long-term incentive plans (assuming that such performance goals are achieved at maximum levels).
Under the 2011 Nonemployee Director Stock Plan (2011 Director Plan), HEI can issue shares of common stock as compensation to nonemployee directors of HEI, Hawaiian Electric and ASB. In June 2019, an additional 300,000 shares were made available for issuance under the 2011 Director Plan. As of June 30, 2021, there were 244,843 shares remaining available for future issuance under the 2011 Director Plan.
Share-based compensation expense and the related income tax benefit were as follows:
 Three months ended June 30Six months ended June 30
(in millions)2021202020212020
HEI consolidated
Share-based compensation expense 1
$2.9 $2.4 $5.5 $4.1 
Income tax benefit0.5 0.4 1.0 0.7 
Hawaiian Electric consolidated
Share-based compensation expense 1
0.9 0.4 2.0 1.2 
Income tax benefit0.2 0.1 0.4 0.2 
1    For the three and six months ended June 30, 2021 and 2020, the Company has not capitalized any share-based compensation.
Stock awards. HEI granted HEI common stock to nonemployee directors under the 2011 Director Plan as follows:
Three months ended June 30Six months ended June 30
(dollars in millions)2021202020212020
Shares granted29,320 35,632 29,320 36,100 
Fair value$1.2 $1.3 $1.2 $1.3 
Income tax benefit0.3 0.3 0.3 0.3 
The number of shares issued to each nonemployee director of HEI, Hawaiian Electric and ASB is determined based on the closing price of HEI common stock on the grant date.
Restricted stock units.  Information about HEI’s grants of restricted stock units was as follows:
Three months ended June 30Six months ended June 30
 2021202020212020
Shares(1)Shares(1)Shares(1)Shares(1)
Outstanding, beginning of period236,191 $37.91 203,441 $40.67 193,939  $40.89 207,641 $35.36 
Granted4,894 44.61 916 37.90 132,492 34.37 78,595 47.99 
Vested(292)38.77 — — (79,280)38.51 (77,719)34.19 
Forfeited(11,018)38.74 — — (17,376)40.01 (4,160)35.81 
Outstanding, end of period229,775 $38.02 204,357  $40.65 229,775  $38.02 204,357 $40.65 
Total weighted-average grant-date fair value of shares granted (in millions)$0.2 $— $4.6 $3.8 
(1)    Weighted-average grant-date fair value per share based on the average price of HEI common stock on the date of grant.
For the six months ended June 30, 2021 and 2020, total restricted stock units and related dividends that vested had a fair value of $3.0 million and $4.2 million, respectively, and the related tax benefits were $0.6 million and $0.7 million, respectively.
As of June 30, 2021, there was $7.3 million of total unrecognized compensation cost related to the nonvested restricted stock units. The cost is expected to be recognized over a weighted-average period of 2.4 years.
Long-term incentive plan payable in stock.  The 2019-2021, 2020-2022 and 2021-2023 long-term incentive plans (LTIP) provide for performance awards under the EIP of shares of HEI common stock based on the satisfaction of performance goals, including a market condition goal. The number of shares of HEI common stock that may be awarded is fixed on the date the grants are made, subject to the achievement of specified performance levels and calculated dividend equivalents. The potential payout varies from 0% to 200% of the number of target shares, depending on the achievement of the goals. The market condition goal is based on HEI’s total shareholder return (TSR) compared to the Edison Electric Institute Index over the relevant three-year period. The other performance condition goals relate to EPS growth, return on average common equity (ROACE), renewable portfolio standards, Hawaiian Electric’s net income growth, ASB’s efficiency ratio and strategic initiatives and Pacific Current’s EBITDA growth and return on average invested capital.
LTIP linked to TSR.  Information about HEI’s LTIP grants linked to TSR was as follows:
Three months ended June 30Six months ended June 30
 2021202020212020
Shares(1)Shares(1)Shares(1)Shares(1)
Outstanding, beginning of period100,053 $42.89 90,616 $42.08 89,222 $42.10 96,402 $39.62 
Granted 1,533 41.12 — — 45,743 41.12 24,630 48.62 
Vested (issued or unissued and cancelled)— — — — (32,355)38.20 (29,409)39.51 
Forfeited(10,427)42.82 — — (11,451)43.10 (1,007)41.72 
Outstanding, end of period91,159 $42.87 90,616 $42.08 91,159 $42.87 90,616  $42.08 
Total weighted-average grant-date fair value of shares granted (in millions)$0.1 $— $1.9 $1.2 
(1)    Weighted-average grant-date fair value per share determined using a Monte Carlo simulation model.
The grant date fair values of the shares were determined using a Monte Carlo simulation model utilizing actual information for the common shares of HEI and its peers for the period from the beginning of the performance period to the grant date and
estimated future stock volatility of HEI and its peers over the remaining three-year performance period. The expected stock volatility assumptions for HEI and its peer group were based on the three-year historic stock volatility. A dividend assumption is not required for the Monte Carlo simulation because the grant payout includes dividend equivalents and projected returns include the value of reinvested dividends.
The following table summarizes the assumptions used to determine the fair value of the LTIP awards linked to TSR and the resulting fair value of LTIP awards granted:
20212020
Risk-free interest rate0.19 %1.39 %
Expected life in years33
Expected volatility29.9 %13.1 %
Range of expected volatility for Peer Group
25.6% to 102.9%
13.6% to 95.4%
Grant date fair value (per share)$41.12$48.62
For the six months ended June 30, 2021 and 2020, total vested LTIP awards linked to TSR and related dividends had a fair value of $0.8 million and $2.6 million, respectively, and the related tax benefits were $0.2 million and $0.4 million, respectively.
As of June 30, 2021, there was $2.1 million of total unrecognized compensation cost related to the nonvested performance awards payable in shares linked to TSR. The cost is expected to be recognized over a weighted-average period of 1.6 years.
LTIP awards 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 June 30Six months ended June 30
2021202020212020
 Shares(1)Shares (1)Shares(1)Shares(1)
Outstanding, beginning of period335,702 $38.04 336,344  $39.64 220,715 $41.03 403,768  $35.15 
Granted 6,133 44.49 — — 182,977 34.33 98,522 48.10 
Vested — — —  — (43,155)34.12 (135,804) 33.48 
Increase above target (cancelled)15,881 42.92 (38,821) 34.12 1,277 31.71 (64,932) 34.12 
Forfeited(41,711)38.27 — — (45,809)38.82 (4,031)39.67 
Outstanding, end of period316,005 $38.38 297,523  $40.37 316,005 $38.38 297,523  $40.37 
Total weighted-average grant-date fair value of shares granted (at target performance levels) (in millions)
$0.3 $— $6.3 $4.7 
(1)    Weighted-average grant-date fair value per share based on the average price of HEI common stock on the date of grant.
For the six months ended June 30, 2021 and 2020, total vested LTIP awards linked to other performance conditions and related dividends had a fair value of $1.7 million and $7.6 million, respectively, and the related tax benefits were $0.4 million and $1.2 million, respectively.
As of June 30, 2021, there was $6.7 million of total unrecognized compensation cost related to the nonvested shares linked to performance conditions other than TSR. The cost is expected to be recognized over a weighted-average period of 1.8 years.