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Business Concentration (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net Premiums Written
Concentration Risk [Line Items]
Concentration percentage	10.30%	23.60%	16.40%
TEXAS | Geographic Concentration Risk
Concentration Risk [Line Items]
Concentration percentage	22.40%	36.50%	26.80%
NORTH CAROLINA | Geographic Concentration Risk
Concentration Risk [Line Items]
Concentration percentage	32.80%	28.40%	27.40%
SOUTH CAROLINA | Geographic Concentration Risk
Concentration Risk [Line Items]
Concentration percentage	10.10%	7.70%	11.40%

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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