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Bank segment (HEI only) - Allowance For Credit Losses (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Allowance for credit losses: |  |  |  |
Beginning balance | $ 71,130 | $ 101,201 | $ 53,355 |
Charge-offs | (6,830) | (9,700) | (26,154) |
Recoveries | 5,379 | 6,054 | 4,748 |
Net (charge-offs) recoveries | (1,451) | (3,646) | (21,406) |
Provision for credit losses | 2,537 | (26,425) | 49,811 |
Ending balance | 72,216 | 71,130 | 101,201 | $ 53,355
Average loans outstanding | $ 5,456,952 | $ 5,220,491 | $ 5,340,287 |
Net charge-offs (recoveries) to average loans | 0.03% | 0.07% | 0.40% |
Accounting standards update, extensible enumeration |  |  |  | Accounting Standards Update 2016-13 [Member]
Commercial |  |  |  |
Allowance for credit losses: |  |  |  |
Beginning balance | $ 15,798 | $ 25,462 | $ 10,245 |
Charge-offs | (563) | (1,561) | (5,819) |
Recoveries | 1,288 | 1,468 | 872 |
Net (charge-offs) recoveries | 725 | (93) | (4,947) |
Provision for credit losses | (4,097) | (9,571) | 19,242 |
Ending balance | 12,426 | 15,798 | 25,462 | $ 10,245
Average loans outstanding | $ 710,658 | $ 856,226 | $ 935,663 |
Net charge-offs (recoveries) to average loans | (0.10%) | 0.01% | 0.53% |
Consumer |  |  |  |
Allowance for credit losses: |  |  |  |
Beginning balance | $ 15,584 | $ 23,950 | $ 16,206 |
Charge-offs | (6,254) | (8,027) | (19,900) |
Recoveries | 3,837 | 4,320 | 3,381 |
Net (charge-offs) recoveries | (2,417) | (3,707) | (16,519) |
Provision for credit losses | 10,372 | (4,659) | 7,800 |
Ending balance | 23,539 | 15,584 | 23,950 | 16,206
Average loans outstanding | $ 161,722 | $ 135,609 | $ 215,994 |
Net charge-offs (recoveries) to average loans | 1.49% | 2.73% | 7.65% |
Impact of adoption of ASU No. 2016-13 |  |  |  |
Allowance for credit losses: |  |  |  |
Beginning balance |  | $ 19,441 |  |
Ending balance |  |  | $ 19,441 |
Impact of adoption of ASU No. 2016-13 | Commercial |  |  |  |
Allowance for credit losses: |  |  |  |
Beginning balance |  | 922 |  |
Ending balance |  |  | 922 |
Impact of adoption of ASU No. 2016-13 | Consumer |  |  |  |
Allowance for credit losses: |  |  |  |
Beginning balance |  | 16,463 |  |
Ending balance |  |  | 16,463 |
Residential 1-4 family | Real estate |  |  |  |
Allowance for credit losses: |  |  |  |
Beginning balance | $ 6,545 | 4,600 | 2,380 |
Charge-offs | (13) | (67) | (7) |
Recoveries | 79 | 92 | 394 |
Net (charge-offs) recoveries | 66 | 25 | 387 |
Provision for credit losses | (341) | 1,920 | (317) |
Ending balance | 6,270 | 6,545 | 4,600 | 2,380
Average loans outstanding | $ 2,331,473 | $ 2,155,322 | $ 2,148,848 |
Net charge-offs (recoveries) to average loans | 0.00% | 0.00% | (0.02%) |
Residential 1-4 family | Impact of adoption of ASU No. 2016-13 | Real estate |  |  |  |
Allowance for credit losses: |  |  |  |
Beginning balance |  | $ 2,150 |  |
Ending balance |  |  | $ 2,150 |
Commercial real estate | Real estate |  |  |  |
Allowance for credit losses: |  |  |  |
Beginning balance | $ 24,696 | 35,607 | 15,053 |
Charge-offs | 0 | 0 | 0 |
Recoveries | 0 | 0 | 0 |
Net (charge-offs) recoveries | 0 | 0 | 0 |
Provision for credit losses | (2,798) | (10,911) | 20,346 |
Ending balance | 21,898 | 24,696 | 35,607 | 15,053
Average loans outstanding | $ 1,204,756 | $ 1,046,276 | $ 861,096 |
Net charge-offs (recoveries) to average loans | 0.00% | 0.00% | 0.00% |
Commercial real estate | Impact of adoption of ASU No. 2016-13 | Real estate |  |  |  |
Allowance for credit losses: |  |  |  |
Beginning balance |  | $ 208 |  |
Ending balance |  |  | $ 208 |
Home equity line of credit | Real estate |  |  |  |
Allowance for credit losses: |  |  |  |
Beginning balance | $ 5,657 | 6,813 | 6,922 |
Charge-offs | 0 | (45) | (77) |
Recoveries | 71 | 113 | 63 |
Net (charge-offs) recoveries | 71 | 68 | (14) |
Provision for credit losses | 397 | (1,224) | 446 |
Ending balance | 6,125 | 5,657 | 6,813 | 6,922
Average loans outstanding | $ 918,563 | $ 885,759 | $ 1,060,444 |
Net charge-offs (recoveries) to average loans | (0.01%) | (0.01%) | 0.00% |
Home equity line of credit | Impact of adoption of ASU No. 2016-13 | Real estate |  |  |  |
Allowance for credit losses: |  |  |  |
Beginning balance |  | $ (541) |  |
Ending balance |  |  | $ (541) |
Residential land | Real estate |  |  |  |
Allowance for credit losses: |  |  |  |
Beginning balance | $ 646 | 609 | 449 |
Charge-offs | 0 | 0 | (351) |
Recoveries | 104 | 61 | 38 |
Net (charge-offs) recoveries | 104 | 61 | (313) |
Provision for credit losses | (33) | (24) | 537 |
Ending balance | 717 | 646 | 609 | 449
Average loans outstanding | $ 21,442 | $ 18,227 | $ 13,799 |
Net charge-offs (recoveries) to average loans | (0.49%) | (0.33%) | 2.27% |
Residential land | Impact of adoption of ASU No. 2016-13 | Real estate |  |  |  |
Allowance for credit losses: |  |  |  |
Beginning balance |  | $ (64) |  |
Ending balance |  |  | $ (64) |
Commercial construction | Real estate |  |  |  |
Allowance for credit losses: |  |  |  |
Beginning balance | $ 2,186 | 4,149 | 2,097 |
Charge-offs | 0 | 0 | 0 |
Recoveries | 0 | 0 | 0 |
Net (charge-offs) recoveries | 0 | 0 | 0 |
Provision for credit losses | (991) | (1,963) | 1,763 |
Ending balance | 1,195 | 2,186 | 4,149 | 2,097
Average loans outstanding | $ 90,021 | $ 111,711 | $ 93,740 |
Net charge-offs (recoveries) to average loans | 0.00% | 0.00% | 0.00% |
Commercial construction | Impact of adoption of ASU No. 2016-13 | Real estate |  |  |  |
Allowance for credit losses: |  |  |  |
Beginning balance |  | $ 289 |  |
Ending balance |  |  | $ 289 |
Residential construction | Real estate |  |  |  |
Allowance for credit losses: |  |  |  |
Beginning balance | $ 18 | 11 | 3 |
Charge-offs | 0 | 0 | 0 |
Recoveries | 0 | 0 | 0 |
Net (charge-offs) recoveries | 0 | 0 | 0 |
Provision for credit losses | 28 | 7 | (6) |
Ending balance | 46 | 18 | 11 | $ 3
Average loans outstanding | $ 18,317 | $ 11,361 | $ 10,703 |
Net charge-offs (recoveries) to average loans | 0.00% | 0.00% | 0.00% |
Residential construction | Impact of adoption of ASU No. 2016-13 | Real estate |  |  |  |
Allowance for credit losses: |  |  |  |
Beginning balance |  | $ 14 |  |
Ending balance |  |  | $ 14 |

X
- Definition Financing Receivable, Average Outstanding + References No definition available. + Details
Name: | he_FinancingReceivableAverageOutstanding
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Financing Receivable, Net Charge-offs (Recoveries) To Average Loans + References No definition available. + Details
Name: | he_FinancingReceivableNetChargeOffsRecoveriesToAverageLoans
Namespace Prefix: | he_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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