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Insurance - Summary of Percentage Ceded to Reinsurers and Reinsurance Recoverable and Rating Levels (Details) $ in Thousands | Mar. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Mar. 31, 2022 USD ($)
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Summary of Ceded Par and Net Unsecured Reinsurance Recoverable [Line Items] |  |  |
Ceded Loss And Loss Expenses Paid Not Yet Recovered |  |  | $ 0
Reinsurance Recoverable, Allowance for Credit Loss | $ 66 |  |
Reinsurance Recoverables, Gross | 130,000 |  |
Unsecured Reinsurance Recoverables | 75,000 |  |
Reinsurance Recoverable, Gross, All Other | 23,000 |  |
Unsecured Reinsurance Recoverable, All Other | 7,000 |  |
Letters of Credit Outstanding, Amount | $ 115,000 |  |
Number of Reinsurers Covering Majority | 3 |  |
Percentage of Ceded Reinsurance Recoverable Represented by Top Three | 82.60% |  |
Uncollateralized Credit Exposure Supoorted by Unlimited Uncapped Indemnity | $ 43,000 | $ 45,000 |
Deferred Ceded Premiums And Reinsurance Recoverables | 265,000 |  |
Financial Guarantee |  |  |
Summary of Ceded Par and Net Unsecured Reinsurance Recoverable [Line Items] |  |  |
Ceded Loss And Loss Expenses Paid Not Yet Recovered | 0 | $ 0 |
QBE Insurance Corporation | Property and Casualty, Commercial Insurance |  |  |
Summary of Ceded Par and Net Unsecured Reinsurance Recoverable [Line Items] |  |  |
Reinsurance Recoverables, Gross | 40,000 |  |
Unsecured Reinsurance Recoverables | 40,000 |  |
Assured Guaranty Re Ltd | Financial Guarantee |  |  |
Summary of Ceded Par and Net Unsecured Reinsurance Recoverable [Line Items] |  |  |
Reinsurance Recoverables, Gross | 30,000 |  |
Unsecured Reinsurance Recoverables | 0 |  |
General Reinsurance Company | Property and Casualty, Commercial Insurance |  |  |
Summary of Ceded Par and Net Unsecured Reinsurance Recoverable [Line Items] |  |  |
Reinsurance Recoverables, Gross | 37,000 |  |
Unsecured Reinsurance Recoverables | $ 27,000 |  |

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- Definition Ceded Loss And Loss Expenses Paid Not Yet Recovered + References No definition available. + Details
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- Definition Includes the unexpired portion of financial guarantee premiums ceded on policies as of the balance sheet date and reinsurance recoverables on claims or claim adjustment expense paid by the ceding insurer. + References No definition available. + Details
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- Definition Number of Reinsurers Covering Majority + References No definition available. + Details
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- Definition Percentage of Ceded Reinsurance Recoverable Represented by Top Three + References No definition available. + Details
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- Definition Reinsurance Recoverable, Gross, All Other + References No definition available. + Details
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- Definition Summary of Ceded Par and Net Unsecured Reinsurance Recoverable [Line Items] + References No definition available. + Details
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- Definition Uncollateralized Credit Exposure Supoorted by Unlimited Uncapped Indemnity + References No definition available. + Details
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- Definition Unsecured Reinsurance Recoverable, All Other + References No definition available. + Details
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- Definition Represents reinsurance recoverables on paid and unpaid losses and deferred ceded premiums, net of ceded premiums payables due to reinsurers, letters of credit, and collateral posted for the benefit of the cedant. + References No definition available. + Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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- Definition Amount of allowance for credit loss on reinsurance recoverable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 + Details
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- Definition Amount before valuation allowance recoverable under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, premium paid, policy benefits and policy reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 14 -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919253-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953401-111524 + Details
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