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Insurance Contracts (Details) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2025 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Insurance [Line Items] |  |  |  |  |
Short-Duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net | $ 84,268 | $ 78,981 |  |  |
Direct Premiums Written | 329,089 | 334,311 | $ 233,702 |  |
Assumed Reinsurance Premiums Written | 31,360 | 48,459 | 39,585 |  |
Ceded Premiums Written | 286,551 | 294,088 | 193,462 |  |
Premiums Written, Net | 73,898 | 88,682 | 79,825 |  |
Direct Premiums Earned | 325,493 | 298,121 | 185,470 |  |
Assumed Reinsurance Premiums Earned | 30,225 | 57,081 | 18,354 |  |
Ceded Reinsurance Premiums Earned | 288,486 | 256,197 | 151,913 |  |
Net premiums earned | 67,232 | 99,005 | 51,911 |  |
Premiums Receivable, Net | 75,085 | 57,222 |  |  |
Allowance for Doubtful Accounts, Premiums and Other Receivables | 500 | 142 | 69 | $ 0 |
Premium Receivable, Credit Loss Expense (Reversal) | 358 | 73 | 69 |  |
Premium Receivable, Allowance for Credit Loss, Writeoff | 0 | 0 | 0 |  |
Premium Receivable, Allowance for Credit Loss, Recovery | 0 | 0 | 0 |  |
Past Due Premiums | 6,781 | 5,690 |  |  |
Liabillity for Claim and Claim Adjustment Expense, with Impact of VIE Consolidation | 459,990 | 349,062 | 197,089 | 89,907 |
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments | 375,722 | 270,081 | 156,301 | 80,155 |
Liability for Unpaid Claims and Claims Adjustment Expense, Net | 84,268 | 78,981 | 40,788 | 9,752 |
Current Year Claims and Claims Adjustment Expense | 42,242 | 67,937 | 36,569 |  |
Prior Year Claims and Claims Adjustment Expense | 4,951 | 4,689 | 143 |  |
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims | 47,193 | 72,626 | 36,712 |  |
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year | 9,939 | 16,202 | 3,798 |  |
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years | 31,967 | 18,231 | 1,878 |  |
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid | 41,906 | 34,433 | 5,676 |  |
Reinsurance recoveries of losses included in losses and loss expenses | (214,987) | (191,151) | (113,622) |  |
Ceded Loss And Loss Expenses Paid Not Yet Recovered |  | 36,210 | 8,765 |  |
Liability for Claims and Claims Adjustment Expense | 459,990 | 349,062 |  |  |
Financial Guarantee |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Ceded Loss And Loss Expenses Paid Not Yet Recovered | 60,470 |  |  |  |
Specialty Property & Casualty Program |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Net premiums earned | 67,232 | 99,005 | 51,911 |  |
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments | 375,722 | 270,081 |  |  |
Commercial Auto | Specialty Property & Casualty Program |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 56,024 |  |  |  |
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | 32,962 |  |  |  |
Short Duration Insurance Contract Liability For Unpaid Clams and Allocated Claim Adjustment Expense Subtotal For Separately Presented | 23,062 | 0 |  |  |
Short-Duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net | $ 23,062 |  |  |  |
Short-Duration Insurance Contracts, Historical Claims Duration, Year One | 11.40% |  |  |  |
Short-Duration Insurance Contracts, Historical Claims Duration, Year Two | 19.60% |  |  |  |
Short-Duration Insurance Contracts, Historical Claims Duration, Year Three | 19.00% |  |  |  |
Short-Duration Insurance Contracts, Historical Claims Duration, Year Four | 30.80% |  |  |  |
Short-Duration Insurance Contracts, Historical Claims Duration, Year Five | 27.40% |  |  |  |
Commercial Auto | Short-Duration Insurance Contract, Accident Year 2021 | Specialty Property & Casualty Program |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | $ 1,212 | 962 | 978 | 468 | $ 432
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 88 |  |  |  |
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | 82 |  |  |  |
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 1,013 | 681 | 150 | 45 | 7
Commercial Auto | Short-Duration Insurance Contract, Accident Year 2022 | Specialty Property & Casualty Program |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 9,832 | 9,099 | 7,866 | 8,225 |
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 1,292 |  |  |  |
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | 1,162 |  |  |  |
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 6,450 | 4,701 | 2,325 | 555 |
Commercial Auto | Short-Duration Insurance Contract, Accident Year 2023 | Specialty Property & Casualty Program |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 25,345 | 23,309 | 19,459 |  |
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 4,279 |  |  |  |
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | 3,282 |  |  |  |
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 17,056 | 10,984 | 3,914 |  |
Commercial Auto | Short-Duration Insurance Contract, Accident Year 2024 | Specialty Property & Casualty Program |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 14,851 | 15,217 |  |  |
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 4,027 |  |  |  |
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | 3,243 |  |  |  |
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 7,885 | 3,554 |  |  |
Commercial Auto | Short-Duration Insurance Contract, Accident Year 2025 | Specialty Property & Casualty Program |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 4,783 |  |  |  |
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 2,972 |  |  |  |
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | 1,564 |  |  |  |
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 557 |  |  |  |
Workers' Compensation Insurance | Specialty Property & Casualty Program |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 39,260 |  |  |  |
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | 21,463 |  |  |  |
Short Duration Insurance Contract Liability For Unpaid Clams and Allocated Claim Adjustment Expense Subtotal For Separately Presented | 17,798 | 0 |  |  |
Short-Duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net | $ 17,798 |  |  |  |
Short-Duration Insurance Contracts, Historical Claims Duration, Year One | 21.80% |  |  |  |
Short-Duration Insurance Contracts, Historical Claims Duration, Year Two | 42.90% |  |  |  |
Short-Duration Insurance Contracts, Historical Claims Duration, Year Three | 31.10% |  |  |  |
Short-Duration Insurance Contracts, Historical Claims Duration, Year Four | 0.00% |  |  |  |
Short-Duration Insurance Contracts, Historical Claims Duration, Year Five | 0.00% |  |  |  |
Workers' Compensation Insurance | Short-Duration Insurance Contract, Accident Year 2021 | Specialty Property & Casualty Program |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | $ 0 | 0 | 0 | 0 | 0
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 0 |  |  |  |
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | 0 |  |  |  |
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 0 | 0 | 0 | 0 | 0
Workers' Compensation Insurance | Short-Duration Insurance Contract, Accident Year 2022 | Specialty Property & Casualty Program |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 0 | 0 | 0 | 0 |
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 0 |  |  |  |
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | 0 |  |  |  |
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 0 | 0 | 0 | 0 |
Workers' Compensation Insurance | Short-Duration Insurance Contract, Accident Year 2023 | Specialty Property & Casualty Program |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 7,362 | 6,056 | 6,053 |  |
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 2,675 |  |  |  |
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | 2,384 |  |  |  |
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 6,230 | 3,938 | 807 |  |
Workers' Compensation Insurance | Short-Duration Insurance Contract, Accident Year 2024 | Specialty Property & Casualty Program |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 15,146 | 16,486 |  |  |
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 5,150 |  |  |  |
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | 4,889 |  |  |  |
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 10,692 | 4,139 |  |  |
Workers' Compensation Insurance | Short-Duration Insurance Contract, Accident Year 2025 | Specialty Property & Casualty Program |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 16,752 |  |  |  |
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 404 |  |  |  |
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | 4,252 |  |  |  |
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 4,541 |  |  |  |
Other Insurance Contracts | Segment Reporting, Reconciling Item, Corporate Nonsegment |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Liability for Claims and Claims Adjustment Expense | 23,530 | 35,146 |  |  |
Excess Liability | Specialty Property & Casualty Program |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 19,400 |  |  |  |
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | 2,503 |  |  |  |
Short Duration Insurance Contract Liability For Unpaid Clams and Allocated Claim Adjustment Expense Subtotal For Separately Presented | 16,897 |  |  |  |
Short-Duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net | $ 16,897 |  |  |  |
Short-Duration Insurance Contracts, Historical Claims Duration, Year One | 0.70% |  |  |  |
Short-Duration Insurance Contracts, Historical Claims Duration, Year Two | 11.60% |  |  |  |
Short-Duration Insurance Contracts, Historical Claims Duration, Year Three | 20.60% |  |  |  |
Short-Duration Insurance Contracts, Historical Claims Duration, Year Four | 0.00% |  |  |  |
Short-Duration Insurance Contracts, Historical Claims Duration, Year Five | 0.00% |  |  |  |
Excess Liability | Short-Duration Insurance Contract, Accident Year 2021 | Specialty Property & Casualty Program |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | $ 16 | 15 | 13 | 3 | 3
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 2 |  |  |  |
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | 2 |  |  |  |
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 0 | 0 | 0 | 0 | 0
Excess Liability | Short-Duration Insurance Contract, Accident Year 2022 | Specialty Property & Casualty Program |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 149 | 161 | 129 | 146 |
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 58 |  |  |  |
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | 4 |  |  |  |
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 104 | 104 | 1 | 0 |
Excess Liability | Short-Duration Insurance Contract, Accident Year 2023 | Specialty Property & Casualty Program |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 1,344 | 1,573 | 1,579 |  |
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 1,162 |  |  |  |
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | 76 |  |  |  |
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 158 | 258 | 6 |  |
Excess Liability | Short-Duration Insurance Contract, Accident Year 2024 | Specialty Property & Casualty Program |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 7,373 | 5,285 |  |  |
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 4,106 |  |  |  |
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | 95 |  |  |  |
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 2,079 | 101 |  |  |
Excess Liability | Short-Duration Insurance Contract, Accident Year 2025 | Specialty Property & Casualty Program |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 10,519 |  |  |  |
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 10,098 |  |  |  |
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | 41 |  |  |  |
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 162 |  |  |  |
General Liability | Specialty Property & Casualty Program |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 14,423 |  |  |  |
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | 1,852 |  |  |  |
Short Duration Insurance Contract Liability For Unpaid Clams and Allocated Claim Adjustment Expense Subtotal For Separately Presented | 12,572 | 0 |  |  |
Short-Duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net | $ 12,572 |  |  |  |
Short-Duration Insurance Contracts, Historical Claims Duration, Year One | 0.60% |  |  |  |
Short-Duration Insurance Contracts, Historical Claims Duration, Year Two | 4.20% |  |  |  |
Short-Duration Insurance Contracts, Historical Claims Duration, Year Three | 55.90% |  |  |  |
Short-Duration Insurance Contracts, Historical Claims Duration, Year Four | 0.30% |  |  |  |
Short-Duration Insurance Contracts, Historical Claims Duration, Year Five | 0.00% |  |  |  |
General Liability | Short-Duration Insurance Contract, Accident Year 2021 | Specialty Property & Casualty Program |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | $ 0 | 0 | 0 | 0 | 0
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 0 |  |  |  |
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | 0 |  |  |  |
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 0 | 0 | 0 | 0 | $ 0
General Liability | Short-Duration Insurance Contract, Accident Year 2022 | Specialty Property & Casualty Program |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 374 | 425 | 217 | 223 |
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 109 |  |  |  |
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | 4 |  |  |  |
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 266 | 265 | 1 | $ 0 |
General Liability | Short-Duration Insurance Contract, Accident Year 2023 | Specialty Property & Casualty Program |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 1,784 | 1,328 | 2,019 |  |
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 886 |  |  |  |
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | 26 |  |  |  |
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 791 | 57 | $ 24 |  |
General Liability | Short-Duration Insurance Contract, Accident Year 2024 | Specialty Property & Casualty Program |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 6,955 | 6,915 |  |  |
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 5,205 |  |  |  |
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | 194 |  |  |  |
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 780 | $ 60 |  |  |
General Liability | Short-Duration Insurance Contract, Accident Year 2025 | Specialty Property & Casualty Program |  |  |  |  |
Insurance [Line Items] |  |  |  |  |
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net | 5,311 |  |  |  |
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net | $ 3,996 |  |  |  |
Short-Duration Insurance Contract, Cumulative Number of Reported Claims | 45 |  |  |  |
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net | $ 15 |  |  |  |

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