Statutory Accounting and Regulation - Schedule of Statutory Net Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
United Property & Casualty Insurance Company
Statutory Accounting Practices
Statutory net income	$ (14,852)	$ (3,916)	$ (26,831)	$ (13,240)
Family Security Insurance Company
Statutory Accounting Practices
Statutory net income	(2,700)	(933)	(1,963)	(750)
Interboro Insurance Company
Statutory Accounting Practices
Statutory net income	(5,028)	$ 986	(1,010)	$ 9,173
American Coastal Insurance Company
Statutory Accounting Practices
Statutory net income	$ (2,248)		$ 9,566