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Bank segment (HEI only) - Collateral-Dependent Loans (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Financing Receivable, Nonaccrual [Line Items] |  |  |
Amortized cost |  |  | $ 5,120,664
Consumer mortgage loans collateralized by residential real estate property in foreclosure process | $ 3,400 | $ 3,800 |
Commercial |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Amortized cost |  |  | $ 670,674
Residential real estate property | Real estate | Residential 1-4 family |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Amortized cost | 3,493 | 2,541 |
Residential real estate property | Real estate | Home equity line of credit |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Amortized cost | 1,294 | 1,567 |
Residential real estate property | Real estate | Residential land |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Amortized cost | 300 | 300 |
Commercial real estate | Real estate | Commercial real estate |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Amortized cost | 1,221 | 2,875 |
Business assets | Commercial |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Amortized cost | 692 | 934 |
Collateral Pledged |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Amortized cost | 7,000 | 8,217 |
Collateral Pledged | Real estate |  |  |
Financing Receivable, Nonaccrual [Line Items] |  |  |
Amortized cost | $ 6,308 | $ 7,283 |

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- Definition Amount excluding accrued interest, before allowance for credit loss, of financing receivable. + References Reference 1: 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=124255953&loc=SL82919230-210447 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447 + Details
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