Discontinued Operations - Schedule of Discontinued Operations - Results of Ops IIC (Parenthetical) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
General and administrative expenses	$ 40,463,000	$ 44,756,000	$ 37,559,000
Tax benefit	$ (35,939,000)	(25,340,000)	$ (10,876,000)
Discontinued Operations | Outside of Interboro Insurance Company Stand Alone
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
General and administrative expenses		385,000
Tax benefit		$ 1,103,000