Effects of Reinsurance on Losses (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Insurance [Abstract]
Net Direct Unpaid Losses and LAE	$ 1,042,994	$ 716,559	$ 579,710
Net Assumed Unpaid Losses and LAE	46,972	43,798	81,493
Unpaid losses and loss adjustment expenses	1,089,966	760,357	661,203	$ 482,232
Net Ceded Unpaid Losses and LAE	(674,746)	(482,315)	(477,870)
Liability for Unpaid Claims and Claims Adjustment Expense, Net	415,220	278,042	183,333	$ 176,559
Direct Unearned Premiums, Net	703,612	637,128	577,467
Assumed Unearned Premiums, Net	20,326	36,927	49,846
Unearned Premiums, Gross	723,938	674,055	627,313
Ceded Unearned Premiums, Net	(384,588)	(270,034)	(217,885)
Unearned Premiums, Net	$ 339,350	$ 404,021	$ 409,428

Liability as of the balance sheet date for amounts representing estimated cost of settling unpaid claims under the terms of the underlying insurance policies, less estimated reinsurance recoveries on such claims. This includes an estimate for claims which have been incurred but not reported. Claim adjustment expenses represent the costs estimated to be incurred in the settlement of unpaid claims.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
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-Subparagraph (SX 210.7-03(13)(a))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
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-Section 50
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=116884095&loc=d3e14764-158437

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