XML 69 R53.htm IDEA: XBRL DOCUMENT
v3.21.1

Bank segment - Credit risk profile - payment activity and assigned grades (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Credit risk profile by internally assigned grade for loans |  |
2021 | $ 353,900 | $ 1,339,586
2020 | 1,271,692 | 590,363
2019 | 526,201 | 382,648
2018 | 344,064 | 335,784
2017 | 305,801 | 368,904
Prior | 1,424,280 | 1,172,236
Revolving | 1,036,112 | 1,093,287
Converted to term loans | 63,720 | 62,418
Total | 5,325,770 | 5,345,226
Real estate |  |
Credit risk profile by internally assigned grade for loans |  |
Total | 4,167,255 | 4,239,745
Real estate | Residential 1-4 family |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 150,713 | 567,282
2020 | 549,607 | 219,464
2019 | 188,299 | 111,243
2018 | 97,991 | 204,269
2017 | 179,131 | 184,888
Prior | 941,796 | 857,093
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 2,107,537 | 2,144,239
Real estate | Home equity line of credit |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 0
Prior | 0 | 0
Revolving | 863,279 | 929,388
Converted to term loans | 38,183 | 34,190
Total | 901,462 | 963,578
Real estate | Residential land |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 2,794 | 8,357
2020 | 8,354 | 3,427
2019 | 2,884 | 1,598
2018 | 1,290 | 939
2017 | 855 | 22
Prior | 1,291 | 1,274
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 17,468 | 15,617
Real estate | Residential construction |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 1,114 | 6,919
2020 | 7,865 | 3,093
2019 | 3,344 | 385
2018 | 383 | 625
2017 | 659 | 0
Prior | 0 | 0
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 13,365 | 11,022
Real estate | Commercial real estate |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 23,091 | 280,864
2020 | 279,866 | 114,426
2019 | 113,628 | 124,301
2018 | 122,286 | 64,087
2017 | 81,637 | 127,799
Prior | 381,460 | 261,388
Revolving | 11,000 | 11,000
Converted to term loans | 0 | 0
Total | 1,012,968 | 983,865
Real estate | Commercial construction |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 245 | 16,390
2020 | 23,818 | 31,965
2019 | 39,513 | 26,990
2018 | 26,990 | 18,000
2017 | 0 | 5,562
Prior | 2,917 | 0
Revolving | 20,972 | 22,517
Converted to term loans | 0 | 0
Total | 114,455 | 121,424
Consumer |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 6,783 | 29,546
2020 | 25,838 | 69,325
2019 | 59,337 | 38,635
2018 | 30,838 | 7,646
2017 | 4,484 | 307
Prior | 478 | 348
Revolving | 16,717 | 18,848
Converted to term loans | 4,036 | 4,078
Total | 148,511 | 168,733
Commercial |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 169,160 | 430,228
2020 | 376,344 | 148,663
2019 | 119,196 | 79,496
2018 | 64,286 | 40,218
2017 | 39,035 | 50,326
Prior | 96,338 | 52,133
Revolving | 124,144 | 111,534
Converted to term loans | 21,501 | 24,150
Total | 1,010,004 | 936,748
Pass | Real estate | Commercial real estate |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 23,091 | 270,603
2020 | 274,952 | 63,301
2019 | 69,384 | 62,168
2018 | 60,627 | 28,432
2017 | 28,174 | 55,089
Prior | 222,617 | 155,654
Revolving | 11,000 | 11,000
Converted to term loans | 0 | 0
Total | 689,845 | 646,247
Pass | Real estate | Commercial construction |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 0 | 14,480
2020 | 21,414 | 31,965
2019 | 39,513 | 26,990
2018 | 26,990 | 0
2017 | 0 | 5,562
Prior | 2,917 | 0
Revolving | 20,972 | 22,517
Converted to term loans | 0 | 0
Total | 111,806 | 101,514
Pass | Commercial |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 169,095 | 392,088
2020 | 337,753 | 117,791
2019 | 96,251 | 75,533
2018 | 60,462 | 29,211
2017 | 28,545 | 12,520
Prior | 51,072 | 35,770
Revolving | 91,178 | 74,520
Converted to term loans | 19,666 | 11,004
Total | 854,022 | 748,437
Special Mention | Real estate | Commercial real estate |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 0 | 10,261
2020 | 4,914 | 36,405
2019 | 29,597 | 57,952
2018 | 57,489 | 33,763
2017 | 51,586 | 68,287
Prior | 97,247 | 48,094
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 240,833 | 254,762
Special Mention | Real estate | Commercial construction |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 245 | 1,910
2020 | 2,404 | 0
2019 | 0 | 0
2018 | 0 | 18,000
2017 | 0 | 0
Prior | 0 | 0
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 2,649 | 19,910
Special Mention | Commercial |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 65 | 37,836
2020 | 38,316 | 23,087
2019 | 15,024 | 1,920
2018 | 1,820 | 6,990
2017 | 6,725 | 30,264
Prior | 33,990 | 13,250
Revolving | 26,301 | 31,362
Converted to term loans | 26 | 11,218
Total | 122,267 | 155,927
Substandard | Real estate | Commercial real estate |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 0 | 0
2020 | 0 | 14,720
2019 | 14,647 | 4,181
2018 | 4,170 | 1,892
2017 | 1,877 | 4,423
Prior | 61,596 | 57,640
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 82,290 | 82,856
Substandard | Real estate | Commercial construction |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 0
Prior | 0 | 0
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 0 | 0
Substandard | Commercial |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 0 | 304
2020 | 275 | 7,785
2019 | 7,921 | 2,043
2018 | 2,004 | 4,017
2017 | 3,765 | 7,542
Prior | 11,276 | 3,113
Revolving | 6,665 | 5,265
Converted to term loans | 1,809 | 1,928
Total | 33,715 | 31,997
Doubtful | Real estate | Commercial real estate |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 0
Prior | 0 | 0
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 0 | 0
Doubtful | Real estate | Commercial construction |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 0
Prior | 0 | 0
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 0 | 0
Doubtful | Commercial |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 0
Prior | 0 | 0
Revolving | 0 | 387
Converted to term loans | 0 | 0
Total | 0 | 387
Current | Real estate | Residential 1-4 family |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 150,713 | 567,282
2020 | 549,327 | 218,988
2019 | 184,339 | 111,243
2018 | 97,560 | 203,916
2017 | 179,131 | 184,888
Prior | 934,471 | 849,788
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 2,095,541 | 2,136,105
Current | Real estate | Home equity line of credit |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 0
Prior | 0 | 0
Revolving | 861,116 | 927,106
Converted to term loans | 36,792 | 33,228
Total | 897,908 | 960,334
Current | Real estate | Residential land |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 2,794 | 8,357
2020 | 8,354 | 3,427
2019 | 2,884 | 1,598
2018 | 1,290 | 939
2017 | 855 | 22
Prior | 292 | 272
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 16,469 | 14,615
Current | Real estate | Residential construction |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 1,114 | 6,919
2020 | 7,865 | 3,093
2019 | 3,344 | 385
2018 | 383 | 625
2017 | 659 | 0
Prior | 0 | 0
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 13,365 | 11,022
Current | Consumer |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 6,658 | 28,818
2020 | 25,307 | 67,159
2019 | 57,781 | 37,072
2018 | 29,734 | 7,207
2017 | 4,219 | 293
Prior | 475 | 348
Revolving | 16,332 | 18,351
Converted to term loans | 3,729 | 3,758
Total | 144,235 | 163,006
30-59 days past due | Real estate | Residential 1-4 family |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 0 | 0
2020 | 280 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 0
Prior | 2,081 | 2,629
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 2,361 | 2,629
30-59 days past due | Real estate | Home equity line of credit |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 0
Prior | 0 | 0
Revolving | 659 | 552
Converted to term loans | 473 | 298
Total | 1,132 | 850
30-59 days past due | Real estate | Residential land |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 0
Prior | 699 | 702
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 699 | 702
30-59 days past due | Real estate | Residential construction |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 0
Prior | 0 | 0
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 0 | 0
30-59 days past due | Consumer |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 125 | 406
2020 | 164 | 1,085
2019 | 577 | 727
2018 | 452 | 155
2017 | 90 | 4
Prior | 1 | 0
Revolving | 106 | 138
Converted to term loans | 125 | 90
Total | 1,640 | 2,605
60-89 days past due | Real estate | Residential 1-4 family |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 0 | 0
2020 | 0 | 476
2019 | 3,018 | 0
2018 | 431 | 0
2017 | 0 | 0
Prior | 1,954 | 2,314
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 5,403 | 2,790
60-89 days past due | Real estate | Home equity line of credit |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 0
Prior | 0 | 0
Revolving | 261 | 267
Converted to term loans | 73 | 75
Total | 334 | 342
60-89 days past due | Real estate | Residential land |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 0
Prior | 0 | 0
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 0 | 0
60-89 days past due | Real estate | Residential construction |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 0
Prior | 0 | 0
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 0 | 0
60-89 days past due | Consumer |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 0 | 191
2020 | 149 | 549
2019 | 623 | 427
2018 | 372 | 165
2017 | 119 | 3
Prior | 1 | 0
Revolving | 80 | 97
Converted to term loans | 92 | 59
Total | 1,436 | 1,491
Greater than 89 days past due | Real estate | Residential 1-4 family |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 0 | 0
2020 | 0 | 0
2019 | 942 | 0
2018 | 0 | 353
2017 | 0 | 0
Prior | 3,290 | 2,362
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 4,232 | 2,715
Greater than 89 days past due | Real estate | Home equity line of credit |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 0
Prior | 0 | 0
Revolving | 1,243 | 1,463
Converted to term loans | 845 | 589
Total | 2,088 | 2,052
Greater than 89 days past due | Real estate | Residential land |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 0
Prior | 300 | 300
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 300 | 300
Greater than 89 days past due | Real estate | Residential construction |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 0 | 0
2020 | 0 | 0
2019 | 0 | 0
2018 | 0 | 0
2017 | 0 | 0
Prior | 0 | 0
Revolving | 0 | 0
Converted to term loans | 0 | 0
Total | 0 | 0
Greater than 89 days past due | Consumer |  |
Credit risk profile by internally assigned grade for loans |  |
2021 | 0 | 131
2020 | 218 | 532
2019 | 356 | 409
2018 | 280 | 119
2017 | 56 | 7
Prior | 1 | 0
Revolving | 199 | 262
Converted to term loans | 90 | 171
Total | $ 1,200 | $ 1,631

X
- Definition Financing Receivable, Term Loans + References No definition available. + Details
Name: | he_FinancingReceivableTermLoans
Namespace Prefix: | he_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable originated more than five years prior to current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 + Details
Name: | us-gaap_FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable originated four years prior to current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 + Details
Name: | us-gaap_FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable originated in current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 + Details
Name: | us-gaap_FinancingReceivableOriginatedInCurrentFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable originated in fiscal year prior to current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 + Details
Name: | us-gaap_FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable originated three years prior to current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 + Details
Name: | us-gaap_FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable originated two years prior to current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 + Details
Name: | us-gaap_FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of financing receivable that can be withdrawn, repaid and redrawn. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 + Details
Name: | us-gaap_FinancingReceivableRevolving
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount, before allowance for credit loss, of financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919230-210447 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922355-210448 + Details
Name: | us-gaap_NotesReceivableGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=he_RealEstatePortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=he_Residential14FamilyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=he_ResidentialLandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=he_ResidentialConstructionLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=he_CommercialConstructionLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_PassMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SpecialMentionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SubstandardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_DoubtfulMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables1To29DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables30To59DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables60To89DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |