Discontinued Operations - Schedule of Assets & Liabilities IIC (Details) - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025	Sep. 30, 2025	Apr. 01, 2025	Dec. 31, 2024
ASSETS
Fixed maturities, available-for-sale	$ 222,345	$ 253,152
Other investments	38,129	40,053
Cash and cash equivalents	294,689	198,762
Accrued investment income	3,042	3,156
Premiums receivable, net	51,215	70,447
Reinsurance recoverable on paid and unpaid losses, net	69,821	128,205
Ceded unearned premiums	168,275	109,697
Deferred policy acquisition costs, net	45,393	37,815
Intangible assets, net	1,593	3,471
Other assets	9,990	11,998
LIABILITIES
Unpaid losses and loss adjustment expenses	95,223	165,701	$ 188,703		$ 322,087
Unearned premiums	271,088	249,616
Reinsurance payable on premiums	138,805	66,841
Accounts payable and accrued expenses	95,999	112,781
Operating lease liability	2,967	3,135
Other liabilities	$ 8,241	$ 7,740
Discontinued Operations | Interboro Insurance
ASSETS
Fixed maturities, available-for-sale				$ 40,925
Other investments				988
Cash and cash equivalents				21,206
Accrued investment income				297
Premiums receivable, net				3,174
Reinsurance recoverable on paid and unpaid losses, net				265
Ceded unearned premiums				2,004
Deferred policy acquisition costs, net				4,462
Intangible assets, net				775
Other assets				488
Total assets				74,584
LIABILITIES
Unpaid losses and loss adjustment expenses				21,391
Unearned premiums				23,574
Payments outstanding				2,223
Accounts payable and accrued expenses				101
Operating lease liability				65
Other liabilities				1,402
Total liabilities				$ 48,756