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Long-Term Debt - Additional Information (Detail) (USD $)
 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended
Jun. 30, 2008
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Mar. 31, 2013
Revolving Line of Credit [Member]
Deutsche Bank [Member]
Mar. 29, 2013
Revolving Line of Credit [Member]
Deutsche Bank [Member]
Dec. 31, 2013
Surplus Note [Member]
Dec. 31, 2007
Surplus Note [Member]
Dec. 31, 2012
Surplus Note [Member]
Dec. 31, 2011
Surplus Note [Member]
Nov. 09, 2006
Surplus Note [Member]
Dec. 31, 2013
Surplus Note [Member]
Hurricane [Member]
Dec. 31, 2013
Term Loan [Member]
Installment
May 23, 2013
Term Loan [Member]
Dec. 31, 2012
Term Loan [Member]
Debt Instrument [Line Items]                              
Long-term debt surplus             $ 18,800,000   $ 20,200,000            
Long-term debt                         18,500,000   0
Surplus note with the SBA under the ICBUI program                     25,000,000     20,000,000  
Statutory capital and surplus   161,800,000                          
Surplus note maturity date   Dec. 31, 2026                     May 23, 2016    
Effective interest rate paid on the surplus note             2.21%   1.96% 3.77%     5.99%    
Principal repayments of Surplus Note   1,500,000 1,500,000 1,500,000     368,000                
Maturity year of debt instrument             Through 2026                
Surplus during the term of surplus note   50,000,000                          
Surplus and Reinsurance sufficient to cover in excess of UPCIC probable maximum loss                       1-in-100 year      
Interest rate increased basis point               4.50%              
Decrease in additional interest rate 4.50%                            
Basis point from decrease in additional interest rate 0.25%                            
Drops below a net written premium to surplus ratio             1.00%                
Gross written premium to surplus ratio             3.00%                
Stated interest rate on Term Loan                         0.50%    
Number of installments                         3    
Term Loan is amortized                         3 years    
Amortization of discount   601,000                       601,000    
Unsecured line of credit, maximum borrowing capacity           10,000,000                  
DB loan, maturity date         Mar. 27, 2015                    
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                    
Interest Expense   $ 1,200,000 $ 414,000 $ 856,000