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Regulatory Requirements and Restrictions - Summary of Ratio of Gross and Net Written Premium to Surplus (Detail)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
HCPCI [Member]
Statutory Accounting Practices [Line Items]
Premium to capital surplus ratio for gross written premiums	1.81	1.85	2.21
Premium to capital surplus ratio for net written premiums	1.07	1.00	1.50
TypTap [Member]
Statutory Accounting Practices [Line Items]
Premium to capital surplus ratio for gross written premiums	0.09
Premium to capital surplus ratio for net written premiums	0.07

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Premium to capital surplus ratios for gross written premiums.

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Premium to capital surplus ratios for net written premiums.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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