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v3.20.1

Retirement benefits (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Defined benefit plans |  |  |
Expected payments for remainder of fiscal year | $ 3,000 |  | $ 2,000
Retirement benefits expense | $ 15,000 | $ 15,000 |
Number of years for which regulatory asset/liability for each utility will be amortized, beginning with respective utility's next rate case (in years) | 5 years |  |
Defined contribution plan, expenses recognized | $ 1,800 | 1,900 |
Cash contributions by the employer to defined contribution plan | 3,200 | 3,700 |
Hawaiian Electric Company, Inc. and Subsidiaries |  |  |
Defined benefit plans |  |  |
Expected payments for remainder of fiscal year | 1,000 |  | 1,000
Retirement benefits expense | 14,000 | 14,000 |
Defined contribution plan, expenses recognized | 700 | 700 |
Cash contributions by the employer to defined contribution plan | 700 | 700 |
Pension benefits |  |  |
Defined benefit plans |  |  |
Contributions made to defined benefit plans | 17,000 | 8,000 |
Contributions expected to be paid in current year | 69,000 |  | 49,000
Service cost | 18,363 | 15,382 |
Interest cost | 20,163 | 21,033 |
Expected return on plan assets | (28,466) | (27,998) |
Amortization of net prior period (gain)/cost | 3 | (11) |
Amortization of net actuarial (gains)/losses | 8,057 | 3,839 |
Net periodic pension/benefit cost (return) | 18,120 | 12,245 |
Impact of PUC D&Os | 6,262 | 12,279 |
Net periodic pension/benefit cost (adjusted for impact of PUC D&Os) | 24,382 | 24,524 |
Pension benefits | American Savings Bank (ASB) |  |  |
Defined benefit plans |  |  |
Contributions expected to be paid in current year | 0 |  | 0
Pension benefits | Hawaiian Electric Industries, Inc. |  |  |
Defined benefit plans |  |  |
Contributions expected to be paid in current year | 1,000 |  | 1,000
Pension benefits | Hawaiian Electric Company, Inc. and Subsidiaries |  |  |
Defined benefit plans |  |  |
Contributions made to defined benefit plans | 17,000 | 8,000 |
Contributions expected to be paid in current year | 68,000 |  | $ 48,000
Service cost | 17,891 | 15,001 |
Interest cost | 18,715 | 19,414 |
Expected return on plan assets | (26,855) | (26,164) |
Amortization of net prior period (gain)/cost | 2 | 2 |
Amortization of net actuarial (gains)/losses | 7,368 | 3,576 |
Net periodic pension/benefit cost (return) | 17,121 | 11,829 |
Impact of PUC D&Os | 6,262 | 12,279 |
Net periodic pension/benefit cost (adjusted for impact of PUC D&Os) | 23,383 | 24,108 |
Other benefits |  |  |
Defined benefit plans |  |  |
Service cost | 631 | 541 |
Interest cost | 1,855 | 1,997 |
Expected return on plan assets | (3,038) | (3,086) |
Amortization of net prior period (gain)/cost | (440) | (452) |
Amortization of net actuarial (gains)/losses | 50 | (3) |
Net periodic pension/benefit cost (return) | (942) | (1,003) |
Impact of PUC D&Os | 777 | 811 |
Net periodic pension/benefit cost (adjusted for impact of PUC D&Os) | (165) | (192) |
Other benefits | Hawaiian Electric Company, Inc. and Subsidiaries |  |  |
Defined benefit plans |  |  |
Service cost | 626 | 537 |
Interest cost | 1,782 | 1,917 |
Expected return on plan assets | (2,990) | (3,035) |
Amortization of net prior period (gain)/cost | (440) | (451) |
Amortization of net actuarial (gains)/losses | 51 | 0 |
Net periodic pension/benefit cost (return) | (971) | (1,032) |
Impact of PUC D&Os | 777 | 811 |
Net periodic pension/benefit cost (adjusted for impact of PUC D&Os) | $ (194) | $ (221) |

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