Effects of Reinsurance on Losses (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Insurance [Abstract]
Net Direct Unpaid Losses and LAE	$ 138,345	$ 72,373	$ 49,734
Net Assumed Unpaid Losses and LAE	2,510	4,419	4,702
Unpaid losses and loss adjustment expenses	140,855	76,792	54,436	$ 47,451
Net Ceded Unpaid Losses and LAE	(18,724)	(2,114)	(1,252)
Liability for Unpaid Claims and Claims Adjustment Expense, Net	122,131	74,678	53,184
Direct Unearned Premiums, Net	371,149	287,148	212,201
Assumed Unearned Premiums, Net	1,074	17,506	17,285
Unearned Premiums, Gross	372,223	304,654	229,486
Ceded Unearned Premiums, Net	(132,564)	(79,400)	(63,827)
Unearned Premiums, Net	$ 239,659	$ 225,254	$ 165,659