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Discontinued Operations - Schedule of Results of Ops IIC (Parenthetical) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Tax benefit	$ (9,887,000)	$ (8,848,000)	$ (25,885,000)	$ (22,321,000)
Discontinued Operations | Outside of Interboro Insurance Company Stand Alone
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Tax benefit				(1,007,000)
Discontinued Operations | IIC
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Tax benefit	$ 0	$ (146,000)	$ (540,000)	$ 1,238,000

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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