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Liability for Unpaid Losses and Loss Adjustment Expenses - Additional Information (Detail) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Claims Development [Line Items] |  |  |  |
Increase (decrease) in unpaid losses and loss adjustment expenses | $ (528,673,000) | $ 692,574,000 | $ 23,751,000 |
Unpaid losses and loss adjustment expenses | 510,117,000 | 1,038,790,000 | 346,216,000 | $ 322,465,000
Incurred (recovered) related to prior year | $ 110,573,000 | 24,980,000 | $ 54,450,000 |
Insurance claim maximum settlement time | 1 year |  |  |
Initial case reserve for claims | $ 2,500 |  |  |
LAE case reserves | 0 |  |  |
Subrogation |  |  |  |
Claims Development [Line Items] |  |  |  |
Subrogation recoveries value | $ 144,100,000 | $ 134,400,000 |  |

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- Definition Amount of increase (decrease) in liability to reflect the estimated ultimate cost of settling claims relating to insured events that have occurred on or before the balance sheet date, whether or not reported to the insurer at that date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 + Details
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- Definition The amount needed to reflect the estimated ultimate cost of settling claims relating to insured events that have occurred on or before the balance sheet date, whether or not reported to the insurer at that date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (cc) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480081/944-40-50-3 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480081/944-40-50-3 + Details
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- Definition Amount, after effects of reinsurance, of expense (reversal of expense) for claims incurred in prior reporting periods and related claims settlement costs. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480081/944-40-50-3 + Details
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- Definition Initial case reserve claim liability. + References No definition available. + Details
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- Definition Liability for unpaid losses and loss adjustment expenses case reserve. + References No definition available. + Details
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- Definition Estimated subrogation is generally deducted from the liability for unpaid claims. + References No definition available. + Details
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