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Statutory Accounting and Regulation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Insurance [Abstract]
Statutory capital and surplus balance	$ 236,479		$ 236,479		$ 166,113
Statutory Net Income [Line Items]
Statutory net income (loss)	27,990	$ 17,859	69,129	$ 74,491
Statutory capital and surplus balance	236,479		236,479		166,113
Statutory net income (loss)	27,990	17,859	69,129	74,491
American Coastal Insurance Company
Insurance [Abstract]
Statutory capital and surplus balance	214,277		214,277		143,452
Statutory Net Income [Line Items]
Statutory net income (loss)	27,821	18,668	69,761	77,781
Statutory capital and surplus balance	214,277		214,277		143,452
Statutory net income (loss)	27,821	18,668	69,761	77,781
Interboro Insurance
Insurance [Abstract]
Statutory capital and surplus balance	22,202		22,202		22,661
Statutory Net Income [Line Items]
Statutory net income (loss)	169	(809)	(632)	(3,290)
Statutory capital and surplus balance	22,202		22,202		$ 22,661
Statutory net income (loss)	$ 169	$ (809)	$ (632)	$ (3,290)

X

- Definition

Statutory Net Income [Line Items]

+ References

No definition available.

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- References

No definition available.

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- Definition

The amount of statutory capital and surplus (stockholders' equity) as of the balance sheet date using prescribed or permitted statutory accounting practices (rather than GAAP, if different) of the state or country.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(23)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 944
-SubTopic 505
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477908/944-505-50-1

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- Definition

Amount of net income for the period determined using accounting principles prescribed or permitted by insurance regulators.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(23)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

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