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Statutory Accounting and Regulation - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statutory Accounting Practices
Statutory Accounting Practices, Statutory Capital and Surplus, Balance	$ 370,720	$ 415,948
Statutory Accounting Practices, Statutory Net Income Amount	(28,326)	$ (38,507)	$ (5,199)
UPC, Subsidiary
Statutory Accounting Practices
Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries	142,399
American Coastal Insurance Company
Statutory Accounting Practices
Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries	81,179
Family Security Holdings (FSH)
Statutory Accounting Practices
Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries	40,635
Interboro Insurance Company
Statutory Accounting Practices
Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries	34,214
Journey Insurance Company
Statutory Accounting Practices
Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries	$ 60,128

X

- Definition

Amount of restricted net assets of consolidated and unconsolidated subsidiaries as of the end of the most recently completed fiscal year.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e)(3)(ii))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

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+ References

No definition available.

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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(23)(c))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 505
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6486098&loc=d3e24708-158529

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-SubTopic 210
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