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Schedule IV (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Abstract]
Direct Premiums Written	$ 1,411,558	$ 1,278,504	$ 1,148,190
Ceded Premiums Written	755,871	633,275	512,270
Assumed Premiums Written	45,305	101,764	104,211
Premiums Written, Net	$ 700,992	$ 746,993	$ 740,131
premiums assumed as percentage of net premiums	6.50%	13.60%	14.10%

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 605
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547

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Amount of written premiums ceded to other entities.

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-Publisher FASB
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Amount, before premiums ceded to other entities and premiums assumed by the entity, of premiums written.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
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Amount, after premiums ceded to other entities and premiums assumed by the entity, of premiums written.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 605
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