Statutory Accounting and Regulation - Schedule of Statutory Net Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
United Property & Casualty Insurance Company
Statutory Accounting Practices
Statutory net income	$ (22)	$ (6,039)
Family Security Insurance Company
Statutory Accounting Practices
Statutory net income	2,798	2,937
Interboro Insurance Company
Statutory Accounting Practices
Statutory net income	358	$ 2,079
American Coastal Insurance Company
Statutory Accounting Practices
Statutory net income	$ 5,852