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v3.25.0.1

Basis of Presentation and Significant Accounting Policies Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Apr. 29, 1991 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2018 | Dec. 31, 2021 | Apr. 30, 2013
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Operating Lease, Liability |  | $ 21,543 | $ 22,041 |  |  |  |
Income Taxes Paid |  | $ 526 | $ 381 | $ 347 |  |  |
Common Stock Voting Restrictions | 10.00% |  |  |  |  |  |
Common stock, par value (in dollars per share) |  |  |  |  |  |  | $ 0.01
Preferred stock, shares authorized |  | 20,000,000 | 20,000,000 |  |  |  |
Preferred Stock, Par or Stated Value Per Share |  | $ 0.01 |  |  |  |  | $ 0.01
Common stock, shares issued |  | 48,875,167 | 46,659,144 |  |  |  |
Common Stock Transfer Restrictions | 5.00% |  |  |  |  |  |
Common Stock Additional Transfer Restrictions |  |  |  |  | 5.00% |  |
Restricted Cash |  | $ 17,669 | $ 11,881 | 13,612 |  |  |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents |  | 47,275 | 19,223 | 19,940 |  | $ 9,969 |
Investment income due and accrued |  | $ 1,703 | $ 1,569 |  |  |  |
Accrued Investment Interest Receivable Write-off Period in Days |  | 90 |  |  |  |  |
Financial Assets Allowance for Credit Loss |  | $ 641 |  |  |  |  |
Preferred stock, shares outstanding (in shares) |  | 0 | 0 |  |  |  |
Investment income due and accrued |  | $ 1,703 | $ 1,569 |  |  |  |
CECL Securities Factor for Consideration |  | 20.00% |  |  |  |  |
Specialty Property & Casualty Program |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Reinsurance, Reinsured Risk, Percentage |  | 70.00% |  |  |  |  |
Xchange |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Ownership percentage |  | 80.00% |  |  |  |  |
All Trans |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Ownership percentage |  | 85.00% |  |  |  |  |
Capacity Marine |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Ownership percentage |  | 80.00% |  |  |  |  |
Riverton |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Ownership percentage |  | 80.00% |  |  |  |  |
Beat |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Ownership percentage |  | 60.00% |  |  |  |  |
Minimum [Member] | Furniture and Fixtures [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Useful Life - Years |  | 3 years |  |  |  |  |
Maximum [Member] | Furniture and Fixtures [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Useful Life - Years |  | 5 years |  |  |  |  |
Long-term Debt [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Interest Paid, Including Capitalized Interest, Operating and Investing Activities |  | $ 3,821 | 0 | 0 |  |  |
Variable Interest Entity, Primary Beneficiary [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Restricted Cash |  | $ 47,275 | $ 19,223 | $ 19,941 |  |  |

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