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Long-Term Debt - Additional Information (Detail)		12 Months Ended
	Mar. 29, 2013 USD ($)	Dec. 31, 2015 USD ($) Installment	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	May. 23, 2013 USD ($)	Nov. 09, 2006 USD ($)
Debt Instrument [Line Items]
Statutory capital and surplus		$ 15,800,000
Principal repayments of Surplus Note		1,500,000	$ 1,500,000	$ 1,500,000
Surplus during the term of surplus note		50,000,000
Amortization of discount		521,000	840,000	601,000
Interest Expense		$ 1,000,000	$ 1,500,000	$ 1,200,000
Deutsche Bank [Member]
Debt Instrument [Line Items]
Unsecured line of credit, maximum borrowing capacity	$ 15,000,000
DB loan, maturity date	Jul. 31, 2017
DB loan, Interest rate		LIBOR plus a margin of 5.50% or Deutsche Bank’s prime rate plus a margin of 3.50%
Basis spread on LIBOR rate	5.50%
Basis spread on Prime rate	3.50%
Unsecured line of credit, amount drawn		$ 0
Surplus Note [Member]
Debt Instrument [Line Items]
Unsecured term loan agreement						$ 25,000,000
Effective interest rate		2.21%	2.73%	2.21%
Principal repayments of Surplus Note		$ 368,000
Maturity year of debt instrument		through 2026
Net written premium to surplus ratio		200.00%
Gross written premium to surplus ratio		600.00%
Surplus Note [Member] | Hurricane [Member]
Debt Instrument [Line Items]
Surplus and Reinsurance sufficient to cover in excess of UPCIC probable maximum loss		1-in-100 year
Term Loan [Member]
Debt Instrument [Line Items]
Unsecured term loan agreement		$ 7,000,000	$ 14,000,000		$ 20,000,000
Effective interest rate		5.99%
Surplus note maturity date		May 23, 2016
Stated interest rate on Term Loan		0.50%
Number of installments | Installment		3
Term Loan is amortized		3 years
Amortization of discount		$ 521,000	$ 840,000

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Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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Face (par) amount of debt instrument at time of issuance.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Description of long-term debt arrangements, which are debt arrangements that originally require full repayment more than twelve months after issuance or greater than the normal operating cycle of the company, if longer, and disclosures pertaining to the underlying arrangements, including repayment terms, conversion features, interest rates, restrictions on assets and activities, debt covenants, and other matters important to users of the financial statements. Types of long-term debt arrangements include borrowing under notes payable, bonds payable, debentures, term loans, and other contractual obligations for payment.

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Minimum surplus amount under amended agreement.

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