Insurance Contracts (Details) $ in Thousands	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
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	375,722	270,081	$ 156,301	$ 80,155
Liability for Claims and Claims Adjustment Expense	459,990	349,062
Commercial Auto | Operating Segments
Insurance [Line Items]
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	136,132	129,752
Liability for Claims and Claims Adjustment Expense	159,194	158,472
Unallocated Loss Adjustment Expense Reserve | Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment
Insurance [Line Items]
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	9,317	5,660
Liability for Claims and Claims Adjustment Expense	14,869	12,238
Other Insurance Contracts | Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment
Insurance [Line Items]
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	24,544	36,231
Liability for Claims and Claims Adjustment Expense	24,834	36,551
Excess and General Liability | Operating Segments
Insurance [Line Items]
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	99,713	43,677
Liability for Claims and Claims Adjustment Expense	116,610	50,248
Workers' Compensation Insurance | Operating Segments
Insurance [Line Items]
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	0	0
Liability for Claims and Claims Adjustment Expense	17,798	14,465
Non-standard Personal Auto | Operating Segments
Insurance [Line Items]
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	191	504
Liability for Claims and Claims Adjustment Expense	3,826	12,689
General Liability | Operating Segments
Insurance [Line Items]
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	51,024	26,925
Liability for Claims and Claims Adjustment Expense	63,596	35,211
Professional Liability Insurance | Operating Segments
Insurance [Line Items]
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	37,996	15,891
Liability for Claims and Claims Adjustment Expense	40,846	17,698
Multi Peril / Business Owners (BOP) | Operating Segments
Insurance [Line Items]
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	4,666	230
Liability for Claims and Claims Adjustment Expense	6,185	273
Surety Product Line | Operating Segments
Insurance [Line Items]
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	12,140	11,211
Liability for Claims and Claims Adjustment Expense	12,233	11,217
Specialty Property & Casualty Program
Insurance [Line Items]
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments	375,722	270,081
Specialty Property & Casualty Program | Operating Segments
Insurance [Line Items]
Liability for Claims and Claims Adjustment Expense	459,991	349,062
Specialty Property & Casualty Program | Commercial Auto
Insurance [Line Items]
Short-Duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net	23,062
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, 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%
Specialty Property & Casualty Program | Commercial Auto | Short-Duration Insurance Contract, Accident Year 2021
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, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	1,013	681	150	45	7
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 88
Short-Duration Insurance Contract, Cumulative Number of Reported Claims	82
Specialty Property & Casualty Program | Commercial Auto | Short-Duration Insurance Contract, Accident Year 2022
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, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	6,450	4,701	2,325	555
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
Specialty Property & Casualty Program | Commercial Auto | Short-Duration Insurance Contract, Accident Year 2023
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, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	17,056	10,984	3,914
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
Specialty Property & Casualty Program | Commercial Auto | Short-Duration Insurance Contract, Accident Year 2024
Insurance [Line Items]
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	$ 14,851	15,217
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	7,885	3,554
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
Specialty Property & Casualty Program | Commercial Auto | Short-Duration Insurance Contract, Accident Year 2025
Insurance [Line Items]
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	$ 4,783
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	557
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
Specialty Property & Casualty Program | Commercial Auto | Operating Segments
Insurance [Line Items]
Short-Duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net	$ 23,062	28,720
Specialty Property & Casualty Program | Unallocated Loss Adjustment Expense Reserve | Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment
Insurance [Line Items]
Short-Duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net	5,552	6,578
Specialty Property & Casualty Program | Other Insurance Contracts | Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment
Insurance [Line Items]
Short-Duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net	289	320
Specialty Property & Casualty Program | Excess and General Liability | Operating Segments
Insurance [Line Items]
Short-Duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net	16,897	6,571
Specialty Property & Casualty Program | Workers' Compensation Insurance
Insurance [Line Items]
Short-Duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net	17,798
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, 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%
Specialty Property & Casualty Program | Workers' Compensation Insurance | Short-Duration Insurance Contract, Accident Year 2021
Insurance [Line Items]
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	$ 0	0	0	0	0
Short-Duration Insurance Contracts, Cumulative Paid 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
Specialty Property & Casualty Program | Workers' Compensation Insurance | Short-Duration Insurance Contract, Accident Year 2022
Insurance [Line Items]
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	$ 0	0	0	0
Short-Duration Insurance Contracts, Cumulative Paid 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
Specialty Property & Casualty Program | Workers' Compensation Insurance | Short-Duration Insurance Contract, Accident Year 2023
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, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	6,230	3,938	807
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
Specialty Property & Casualty Program | Workers' Compensation Insurance | Short-Duration Insurance Contract, Accident Year 2024
Insurance [Line Items]
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	$ 15,146	16,486
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	10,692	4,139
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
Specialty Property & Casualty Program | Workers' Compensation Insurance | Short-Duration Insurance Contract, Accident Year 2025
Insurance [Line Items]
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	$ 16,752
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	4,541
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 404
Short-Duration Insurance Contract, Cumulative Number of Reported Claims	4,252
Specialty Property & Casualty Program | Workers' Compensation Insurance | Operating Segments
Insurance [Line Items]
Short-Duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net	$ 17,798	14,465
Specialty Property & Casualty Program | Non-standard Personal Auto | Operating Segments
Insurance [Line Items]
Short-Duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net	3,635	12,185
Specialty Property & Casualty Program | Insurance, Other
Insurance [Line Items]
Short-Duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net	8,388
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	33,829
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	25,441
Short Duration Insurance Contract Liability For Unpaid Clams and Allocated Claim Adjustment Expense Subtotal For Separately Presented	$ 8,388	0
Short-Duration Insurance Contracts, Historical Claims Duration, Year One	18.20%
Short-Duration Insurance Contracts, Historical Claims Duration, Year Two	31.10%
Short-Duration Insurance Contracts, Historical Claims Duration, Year Three	10.10%
Short-Duration Insurance Contracts, Historical Claims Duration, Year Four	0.00%
Short-Duration Insurance Contracts, Historical Claims Duration, Year Five	0.00%
Specialty Property & Casualty Program | Insurance, Other | Short-Duration Insurance Contract, Accident Year 2021
Insurance [Line Items]
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	$ 0	0	0	0	0
Short-Duration Insurance Contracts, Cumulative Paid 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
Specialty Property & Casualty Program | Insurance, Other | Short-Duration Insurance Contract, Accident Year 2022
Insurance [Line Items]
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	$ 1	3	1	1
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	0	0	0	0
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 1
Short-Duration Insurance Contract, Cumulative Number of Reported Claims	788
Specialty Property & Casualty Program | Insurance, Other | Short-Duration Insurance Contract, Accident Year 2023
Insurance [Line Items]
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	$ 5,884	5,907	6,142
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	5,522	4,342	966
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 2,441
Short-Duration Insurance Contract, Cumulative Number of Reported Claims	18,743
Specialty Property & Casualty Program | Insurance, Other | Short-Duration Insurance Contract, Accident Year 2024
Insurance [Line Items]
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	$ 24,292	23,475
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	19,489	10,802
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 1,513
Short-Duration Insurance Contract, Cumulative Number of Reported Claims	57,524
Specialty Property & Casualty Program | Insurance, Other | Short-Duration Insurance Contract, Accident Year 2025
Insurance [Line Items]
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	$ 3,652
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	430
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 1,595
Short-Duration Insurance Contract, Cumulative Number of Reported Claims	2,307
Specialty Property & Casualty Program | General Liability
Insurance [Line Items]
Short-Duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net	$ 12,572
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, 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%
Specialty Property & Casualty Program | General Liability | Short-Duration Insurance Contract, Accident Year 2021
Insurance [Line Items]
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	$ 0	0	0	0	0
Short-Duration Insurance Contracts, Cumulative Paid 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
Specialty Property & Casualty Program | General Liability | Short-Duration Insurance Contract, Accident Year 2022
Insurance [Line Items]
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	$ 374	425	217	223
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	266	265	1	$ 0
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 109
Short-Duration Insurance Contract, Cumulative Number of Reported Claims	4
Specialty Property & Casualty Program | General Liability | Short-Duration Insurance Contract, Accident Year 2023
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, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	791	57	$ 24
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 886
Short-Duration Insurance Contract, Cumulative Number of Reported Claims	26
Specialty Property & Casualty Program | General Liability | Short-Duration Insurance Contract, Accident Year 2024
Insurance [Line Items]
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	$ 6,955	6,915
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	780	60
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 5,205
Short-Duration Insurance Contract, Cumulative Number of Reported Claims	194
Specialty Property & Casualty Program | General Liability | Short-Duration Insurance Contract, Accident Year 2025
Insurance [Line Items]
Short-Duration Insurance Contracts, Incurred Claims and Allocated Claim Adjustment Expense, Net	$ 5,311
Short-Duration Insurance Contracts, Cumulative Paid Claims and Allocated Claim Adjustment Expense, Net	15
Short-Duration Insurance Contracts, Incurred but Not Reported (IBNR) Claims Liability, Net	$ 3,996
Short-Duration Insurance Contract, Cumulative Number of Reported Claims	45
Specialty Property & Casualty Program | General Liability | Operating Segments
Insurance [Line Items]
Short-Duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net	$ 12,572	8,286
Specialty Property & Casualty Program | Professional Liability Insurance | Operating Segments
Insurance [Line Items]
Short-Duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net	2,851	1,807
Specialty Property & Casualty Program | Multi Peril / Business Owners (BOP) | Operating Segments
Insurance [Line Items]
Short-Duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net	1,519	43
Specialty Property & Casualty Program | Surety Product Line | Operating Segments
Insurance [Line Items]
Short-Duration Insurance Contracts, Liability for Unpaid Claims and Allocated Claim Adjustment Expense, Net	$ 94	$ 6