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Insurance Operations - Additional Information (Details) - USD ($) | 9 Months Ended
--- | ---
Sep. 30, 2023 | Sep. 30, 2022
UPCIC |  |
Statutory Accounting Practices [Line Items] |  |
Dividend paid to immediate parent company | $ 0 |
APPCIC |  |
Statutory Accounting Practices [Line Items] |  |
Dividend paid to immediate parent company |  | $ 0
UPCIC and APPCIC |  |
Statutory Accounting Practices [Line Items] |  |
Minimum capitalization rate | 10.00% |
UPCIC and APPCIC | Minimum |  |
Statutory Accounting Practices [Line Items] |  |
Minimum capitalization amount | $ 15,000,000 |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(23)(c)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 + Details
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