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Bank segment (HEI only) - Mortgage Servicing Rights and Valuation Allowance Roll Forward (Details) - American Savings Bank (ASB) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Mortgage servicing rights |  |  |
Beginning balance | $ 9,950 |  |
Ending balance | 9,047 | $ 9,950 |
Allowance for mortgage-servicing assets – bank |  |  |
Mortgage servicing rights |  |  |
Beginning balance | 9,950 | 10,280 | $ 9,101
Amount capitalized | 1,130 | 3,404 | 5,096
Amortization | (2,033) | (3,734) | (3,917)
Sale of mortgage servicing rights | 0 | 0 | 0
Other-than-temporary impairment | 0 | 0 | 0
Ending balance | 9,047 | 9,950 | 10,280
Valuation allowance for mortgage servicing rights |  |  |
Beginning balance | 0 | 260 | 0
Provision | 0 | (260) | 260
Other-than-temporary impairment | 0 | 0 | 0
Ending balance | 0 | 0 | 260
Net carrying amount | 9,047 | $ 9,950 | $ 10,020
Estimated Aggregate Amortization Expenses of Mortgage Servicing Rights |  |  |
2023 | 1,200 |  |
2024 | 1,100 |  |
2025 | 1,000 |  |
2026 | 900 |  |
2027 | $ 800 |  |

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- Definition Estimated Aggregate Amortization Expenses of Mortgage Servicing Rights [Abstract] + References No definition available. + Details
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- Definition Mortgage Servicing Rights [Roll Forward] + References No definition available. + Details
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- Definition Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount of other-than-temporary impairment (OTTI) applied to contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (a)(6) -URI https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746 + Details
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- Definition Reflects the estimated amount of impairment as of the balance sheet date of recognized servicing assets that are being amortized in proportion to and over the period of estimated net servicing income or loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 4 -Subparagraph (e)(1) -URI https://asc.fasb.org/extlink&oid=128311188&loc=d3e122739-111746 + Details
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