Statutory Accounting and Regulation - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statutory Accounting Practices [Line Items]
Assessments levied, for Citizens	1.00%
Assessments levied, for FHCF	1.30%
Statutory Accounting Practices, Statutory Capital and Surplus, Balance	$ 437,449,000	$ 389,384,000
Statutory Accounting Practices, Statutory Net Income Amount	(5,199,000)	$ 832,000	$ 6,083,000
UPC, Subsidiary
Statutory Accounting Practices [Line Items]
Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries	156,719,000
American Coastal Insurance Company
Statutory Accounting Practices [Line Items]
Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries	143,699,000
Family Security Holdings (FSH)
Statutory Accounting Practices [Line Items]
Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries	48,513,000
Interboro Insurance Company
Statutory Accounting Practices [Line Items]
Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries	40,890,000
Journey [Member]
Statutory Accounting Practices [Line Items]
Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries	$ 60,130,000