Reinsurance - Schedule of Ceded Premiums Earned by Type (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Effects of Reinsurance [Line Items]
Ceded Premiums Written	$ (7,841)	$ (4,330)	$ (204,004)	$ (179,203)
Increase (Decrease) in Ceded Unearned Premiums	(45,458)	(40,400)	55,167	56,809
Ceded Premiums Earned	(53,299)	(44,730)	(148,837)	(122,394)
Excess of Loss Product Line
Effects of Reinsurance [Line Items]
Ceded Premiums Written	(476)	1,898	(182,503)	(163,221)
Equipment and Identity Theft Product Line
Effects of Reinsurance [Line Items]
Ceded Premiums Written	(2,359)	(1,723)	(6,136)	(4,521)
Flood Product Line
Effects of Reinsurance [Line Items]
Ceded Premiums Written	(5,006)	(4,505)	(12,969)	(11,461)
Novation of Auto Policies
Effects of Reinsurance [Line Items]
Ceded Premiums Written	$ 0	$ 0	$ (2,396)	$ 0