Segment Reporting (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Segment Reporting Information [Line Items]
Number of Reportable Segments	2
Net premiums earned	$ 67,232	$ 99,005	$ 51,911
Commissions	143,381	92,023	51,281
Program fees	14,322	13,506	8,437
Revenues from external customers	143,381	92,023	51,281
Investment income	10,647	14,448	13,159
Net gains (losses) on derivative contracts	1,019	4,016	(279)
Other	(4,780)	10,480	(60)
Total revenues	251,222	235,815	124,728
Loss and loss adjustment expenses	47,193	72,626	36,712
Policy acquisition costs	15,790	23,666	10,557
Depreciation, Depletion and Amortization	41,952	19,947	5,230
Commissions	37,037	40,876	29,465
Depreciation expense	3,908	2,345	1,078
Amortization of intangible assets	38,044	17,602	4,152
EBITDA	(40,422)	(30,518)	(18,991)
AMBAC EBITDA	(54,929)	(36,966)	(21,093)
Interest expense	18,640	9,379	0
Compensation expense	109,847	64,346	48,468
Non Compensation expense	81,777	64,820	18,517
Total expenses	352,236	295,660	148,949
Pretax income (loss) from continuing operations	(101,014)	(59,845)	(24,221)
Income Tax Expense (Benefit)	(5,211)	(924)	(989)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total	(95,803)	(58,921)	(23,232)
Noncontrolling interest	(2,601)	(361)	(1,319)
Net income (loss) attributable to shareholders	(98,404)	(59,282)	(24,551)
Discontinued operations	(163,288)	(497,167)	28,183
Net income (loss) attributable to shareholders	(261,692)	(556,449)	3,632
Assets	2,223,317	8,058,378	8,428,320
Disposal Group, Including Discontinued Operation, Assets	0	6,267,200	7,516,456
Insurance Agency Management Fee	20,419	6,353
Other Comprehensive Income Loss Net Of Tax Portion Attributable to Noncontrolling Interest, Adjusted EBITDA	(14,507)	(6,448)	(2,102)
United States [Member]
Segment Reporting Information [Line Items]
Total revenues	172,321	212,605	124,728
United Kingdom
Segment Reporting Information [Line Items]
Total revenues	78,901	23,210	0
Specialty Property & Casualty Program
Segment Reporting Information [Line Items]
Net premiums earned	67,232	99,005	51,911
Program fees	14,322	13,506	8,437
Investment income	6,811	6,400	3,795
Other	38	7,409	(42)
Total revenues	88,403	126,320	64,101
Loss and loss adjustment expenses	47,193	72,626	36,712
Policy acquisition costs	15,790	23,666	10,557
Depreciation expense	0	0	0
EBITDA	3,330	12,222	383
AMBAC EBITDA	3,330	12,222	383
Interest expense			0
Compensation expense	12,245	10,201	10,853
Non Compensation expense	9,845	7,605	5,596
Total expenses	85,073	114,098	63,718
Pretax income (loss) from continuing operations	3,330	12,222	383
Income Tax Expense (Benefit)	(374)	(1,753)	(48)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total	2,956	10,469	335
Noncontrolling interest	0	2	(1)
Net income (loss) attributable to shareholders	2,956	10,471	334
Assets	894,692	751,272	523,179
Insurance Distribution
Segment Reporting Information [Line Items]
Commissions	143,381	92,023	51,281
Investment income	1,514	787	64
Other	(1,588)	73	200
Total revenues	163,726	99,236	51,546
Depreciation, Depletion and Amortization	38,734	18,083	4,194
Commissions	37,037	40,876	29,465
Depreciation expense	690	481	42
Operating Expenses		9,379
Amortization of intangible assets	38,044	17,602	4,152
EBITDA	36,918	19,653	11,483
AMBAC EBITDA	22,411	13,205	9,381
Interest expense	18,640		0
Compensation expense	63,761	28,353	7,951
Non Compensation expense	26,010	10,354	2,647
Total expenses	184,182	107,045	44,257
Pretax income (loss) from continuing operations	(20,456)	(7,809)	7,289
Income Tax Expense (Benefit)	5,103	928	(156)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total	(15,353)	(6,881)	7,133
Noncontrolling interest	(2,601)	(363)	(1,318)
Net income (loss) attributable to shareholders	(17,954)	(7,244)	5,815
Assets	1,243,979	900,222	154,846
Insurance Agency Management Fee	20,419	6,353
Other Comprehensive Income Loss Net Of Tax Portion Attributable to Noncontrolling Interest, Adjusted EBITDA	(14,507)	(6,448)	(2,102)
Continuing Operations
Segment Reporting Information [Line Items]
Assets	2,223,317	1,791,178	911,864
Corporate Segment
Segment Reporting Information [Line Items]
Investment income	2,323	7,261	9,298
Other	(3,230)	2,998	(218)
Total revenues	(907)	10,259	9,080
Depreciation, Depletion and Amortization	3,218	1,864	1,036
Depreciation expense	3,218	1,864	1,036
EBITDA	(80,670)	(62,393)	(30,858)
AMBAC EBITDA	(80,670)	(62,393)	(30,858)
Compensation expense	33,841	25,791	29,664
Non Compensation expense	45,922	46,861	10,274
Total expenses	82,981	74,516	40,974
Pretax income (loss) from continuing operations	(83,888)	(64,257)	(31,894)
Income Tax Expense (Benefit)	482	1,748	1,193
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total	(83,406)	(62,509)	(30,701)
Net income (loss) attributable to shareholders	(83,406)	(62,509)	(30,701)
Assets	$ 84,646	$ 139,684	$ 233,839