Effects of Reinsurance on Losses (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Insurance [Abstract]
Net Direct Unpaid Losses and LAE	$ 716,559	$ 579,710	$ 441,355
Net Assumed Unpaid Losses and LAE	43,798	81,493	40,877
Unpaid losses and loss adjustment expenses	760,357	661,203	482,232	$ 140,855
Net Ceded Unpaid Losses and LAE	(482,315)	(477,870)	(305,673)
Liability for Unpaid Claims and Claims Adjustment Expense, Net	278,042	183,333	176,559
Direct Unearned Premiums, Net	637,128	577,467	528,419
Assumed Unearned Premiums, Net	36,927	49,846	27,454
Unearned Premiums, Gross	674,055	627,313	555,873
Ceded Unearned Premiums, Net	(270,034)	(217,885)	(201,904)
Unearned Premiums, Net	$ 404,021	$ 409,428	$ 353,969