Regulatory Requirements and Restrictions - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Statutory Accounting Practices [Line Items]
Payment of dividends	$ 90,561,000
Minimum percentage of capital and surplus requires to maintain by Company	10.00%
Statutory capital and surplus	$ 149,000,000	$ 153,000,000	$ 183,000,000
Dividend distribution open capital surplus under condition 1	10.00%
Dividend distribution open capital surplus under condition 2	10.00%
Percentage of unrealized capital gain under condition 2	25.00%
Dividend distribution open capital surplus under condition 3	10.00%
Percentage of unrealized capital gain under condition 3	25.00%
Payment of cash dividend to parent			0
Restricted net assets of Company's insurance subsidiaries	$ 181,571,000	180,286,000
HCPCI Domiciled in Florida [Member]
Statutory Accounting Practices [Line Items]
Statutory net income (loss) Amount	$ 20,700,000	(10,500,000)	5,900,000
Statutory accounting practices, Future dividend payments restrictions, Capital Surplus Percentage	10.00%
Statutory accounting practices, Future dividend payments restrictions, Statutory Capital surplus Percentage	115.00%
Statutory accounting practices, Future dividend payments restrictions, Notice Period	30 days
Premium to capital surplus ratios, percentage of written premiums	90.00%
Statutory accounting practices return of capital distribution	$ 10,000,000
TypTap [Member]
Statutory Accounting Practices [Line Items]
Statutory capital and surplus	26,000,000	24,000,000	25,000,000
Statutory net income (loss) Amount	$ 2,034,000	$ 797,000	$ 364,000
Premium to capital surplus ratio for gross written premiums	0.57	0.33	0.09
Premium to capital surplus ratio for net written premiums	0.38	0.27	0.07
HCPCI and TypTap [Member]
Statutory Accounting Practices [Line Items]
Deposit in Trust with state regulatory authorities	$ 300,000
Claddaugh Domiciled in Bermuda [Member]
Statutory Accounting Practices [Line Items]
Minimum amount of statutory capital and surplus required		$ 2,000,000
Statutory capital and surplus	45,000,000	63,000,000
Statutory net income (loss) Amount	8,100,000	(5,200,000)	$ 13,200,000
Payment of cash dividend to parent		20,000,000
Us Insurance Subsidiaries [Member]
Statutory Accounting Practices [Line Items]
Statutory capital and surplus	$ 175,077,000
Maximum [Member] | Insurance Subsidiaries Domiciled in Florida [Member]
Statutory Accounting Practices [Line Items]
Premium to capital surplus ratio for gross written premiums	10
Premium to capital surplus ratio for net written premiums	4
Minimum [Member] | HCPCI Domiciled in Florida [Member]
Statutory Accounting Practices [Line Items]
Minimum amount of statutory capital and surplus required	$ 21,700,000	25,900,000
Minimum [Member] | TypTap [Member]
Statutory Accounting Practices [Line Items]
Minimum amount of statutory capital and surplus required	20,000,000	$ 20,000,000	$ 20,000,000
Minimum [Member] | Us Insurance Subsidiaries [Member]
Statutory Accounting Practices [Line Items]
Minimum amount of statutory capital and surplus required	$ 41,700,000