Discontinued Operations - Schedule of Discontinued Operations - Assets & Liabilities IIC and UPC (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Apr. 01, 2025	Dec. 31, 2024	Dec. 31, 2023	Feb. 27, 2023	Dec. 31, 2022
ASSETS
Fixed maturities, available-for-sale	$ 253,152		$ 281,001
Equity securities	61,685		36,794
Other investments	40,053		23,623
Cash and cash equivalents	198,762		137,036
Restricted cash	94,092		62,357
Accrued investment income	3,156		2,964
Premiums receivable, net	70,447		46,564
Reinsurance recoverable on paid and unpaid losses, net	128,205		263,419
Ceded uneared premiums	109,697		160,893
Deferred policy acquisition costs, net	(37,815)		(40,282)	$ (21,149)
Intangible assets, net	3,471		5,908
Other assets	11,998		16,816
Total assets	0		73,243
LIABILITIES
Unpaid losses and loss adjustment expenses	165,701		322,087	$ 347,738		$ 816,489
Unearned premiums	249,616		285,354
Reinsurance payable on premiums	66,841		83,130
Accounts payable and accrued expenses	112,781		86,140
Operating lease liability	3,135		3,323
Other liabilities	7,740		1,456
Notes payable, net	149,353		149,020
Total liabilities	$ 0		49,942
Discontinued Operations | Interboro Insurance
ASSETS
Fixed maturities, available-for-sale		$ 40,925	38,523
Other investments		988	978
Cash and cash equivalents		21,206	22,897
Accrued investment income		297	317
Premiums receivable, net		3,174	1,606
Reinsurance recoverable on paid and unpaid losses, net		265	259
Ceded uneared premiums		2,004	4,075
Deferred policy acquisition costs, net		(4,462)	(3,647)
Intangible assets, net		775	775
Other assets		488	166
Total assets		74,584	73,243
LIABILITIES
Unpaid losses and loss adjustment expenses		21,391	21,499
Unearned premiums		23,574	20,238
Reinsurance payable on premiums		0	3,966
Payments outstanding		2,223	3,091
Accounts payable and accrued expenses		101	1,058
Operating lease liability		65	69
Other liabilities		1,402	21
Total liabilities		$ 48,756	$ 49,942
Discontinued Operations | UPC Insurance
ASSETS
Fixed maturities, available-for-sale					$ 1,380
Equity securities					272
Other investments					12,882
Cash and cash equivalents					224,824
Restricted cash					7,758
Accrued investment income					875
Premiums receivable, net					22,733
Reinsurance recoverable on paid and unpaid losses, net					548,929
Ceded uneared premiums					75,262
Deferred policy acquisition costs, net					(89)
Other assets					51,625
Total assets					946,451
LIABILITIES
Unpaid losses and loss adjustment expenses					920,431
Unearned premiums					98,655
Reinsurance payable on premiums					12,612
Payments outstanding					144,238
Accounts payable and accrued expenses					1,361
Other liabilities					3,476
Notes payable, net					4,118
Total liabilities					$ 1,184,891