RELATED PARTY TRANSACTIONS (Details) - USD ($)	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Related Party Transaction [Line Items]
Ceded premiums related to loss and quota share reinsurance agreements	$ 285,986,000	$ 268,516,000	$ 201,998,000
Hurricane Matthew [Member]
Related Party Transaction [Line Items]
Ceded losses related to loss and quota share reinsurance agreements	800,000	100,000	0
Transatlantic Reinsurance Company [Member]
Related Party Transaction [Line Items]
Ceded premiums related to loss and quota share reinsurance agreements	5,000,000	4,300,000	1,200,000
Law Firm Associated with Chairman of the Board of Directors [Member]
Related Party Transaction [Line Items]
Fees paid to related party	72,198	26,286	$ 6,538
Crosswinds AUM, LLC [Member]
Related Party Transaction [Line Items]
Fees paid to related party	$ 200,000	$ 200,000

Amount of written premiums ceded to other entities.

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 605
-Section 50
-Paragraph 1
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547

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Amount of reduction of provision for policy benefits and costs incurred for policies ceded.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 20
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6480758&loc=d3e6811-158387

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

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