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Bank segment - Narrative (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Allowance for credit losses |  |  |  |  |
Goodwill impairment |  |  | $ 82,190,000 | $ 0 |
Other bank borrowings | $ 520,000,000 |  | 520,000,000 |  | $ 750,000,000
American Savings Bank (ASB) |  |  |  |  |
Allowance for credit losses |  |  |  |  |
Goodwill impairment | 82,190,000 | $ 0 | $ 82,190,000 | 0 |
Minimum benchmark percentage of loan to appraisal ratio which mortgage insurance is required |  |  | 80.00% |  |
Unused line and letters of credits | 1,900,000,000 |  | $ 1,900,000,000 |  |
Advances from the FHLB | 520,000,000.0 |  | 520,000,000.0 |  | 200,000,000.0
American Savings Bank (ASB) | Federal Reserve Bank Advances |  |  |  |  |
Allowance for credit losses |  |  |  |  |
Other bank borrowings | $ 0 |  | 0 |  | $ 550,000,000.0
Home equity line of credit |  |  |  |  |
Allowance for credit losses |  |  |  |  |
Conversion of debt |  |  | 11,300,000 | 14,900,000 |
Commercial |  |  |  |  |
Allowance for credit losses |  |  |  |  |
Conversion of debt |  |  | 1,900,000 | 2,000,000.0 |
Consumer |  |  |  |  |
Allowance for credit losses |  |  |  |  |
Conversion of debt |  |  | $ 400,000 | $ 900,000 |

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- Definition This element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. This item represents other bank borrowings as of the balance sheet date, including securities sold under agreements to repurchase and advances from the Federal Home Loan Bank. + References No definition available. + Details
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- Definition Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 470 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478878/942-470-45-1 + Details
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- Definition Amount of impairment loss from asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 24 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482548/350-20-55-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-2 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482573/350-20-50-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482598/350-20-45-2 + Details
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