Reinsurance - Schedule of Ceded Premiums Earned by Type (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Effects of Reinsurance [Line Items]
Ceded Premiums Written	$ (35,063)	$ (8,676)
Increase (Decrease) in Ceded Unearned Premiums	(39,819)	(36,456)
Ceded Premiums Earned	(74,882)	(45,132)
Excess of Loss Product Line
Effects of Reinsurance [Line Items]
Ceded Premiums Written	(29,599)	(4,057)
Equipment and Identity Theft Product Line
Effects of Reinsurance [Line Items]
Ceded Premiums Written	(2,073)	(1,576)
Flood Product Line
Effects of Reinsurance [Line Items]
Ceded Premiums Written	$ (3,391)	$ (3,043)