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