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Statutory Financial Information - Additional Information (Detail) - USD ($) $ in Thousands |  |  |  |  |  |  |  |  |  |  |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 30, 2022 | Oct. 11, 2022 | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2022 | Apr. 30, 2022 | Jun. 30, 2020 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Statutory Accounting Practices [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends | $ 3,389 | $ 3,616 | $ 3,602 | $ 3,597 | $ 3,587 | $ 3,583 | $ 3,579 | $ 3,570 | $ 3,558 | $ 3,552 | $ 3,545 | $ 3,539 |  |  |  | $ 14,543 | $ 14,578 | $ 14,645
Merger date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Aug. 28, 2020 |  |
Penn Patriot Insurance Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statutory Accounting Practices [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum amount of dividends that could be paid in 2020 under applicable laws and regulations without regulatory approval |  |  |  |  |  |  |  |  |  |  |  |  | $ 36,700 |  |  | $ 36,700 |  |
United National Insurance Companies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statutory Accounting Practices [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum amount of dividends that could be paid in 2020 under applicable laws and regulations without regulatory approval |  |  |  |  |  |  |  |  |  |  |  |  | 25,500 |  |  | 25,500 |  |
Dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,500 |  |
American Reliable Insurance Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statutory Accounting Practices [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends |  |  |  |  |  |  |  |  |  |  |  |  | 102,300 | $ 22,500 |  | 124,800 |  |
Penn- America Insurance Companies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statutory Accounting Practices [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum amount of dividends that could be paid in 2020 under applicable laws and regulations without regulatory approval |  |  |  |  |  |  |  |  |  |  |  |  | $ 11,000 |  |  | 11,000 |  |
Maximum amount of dividends payable under applicable laws and regulations without regulatory approval which would be distributed to wholly owned parent company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,600 |  |
Dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,500 |  |
Global Indemnity Reinsurance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statutory Accounting Practices [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 226,000 |  |  |
Maximum reduction in statutory capital allowed without regulatory approval |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 15.00% |  |
Maximum reduction in statutory capital and surplus allowed without regulatory approval |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 25.00% |  |

X
- Definition Amount available for dividend distribution without prior approval from regulatory agency which would be distributed to wholly owned parent company. + References No definition available. + Details
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