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Commitments and Contingencies - Additional Information (Detail)
$ in Thousands
6 Months Ended
Sep. 10, 2013
USD ($)
Jun. 30, 2015
USD ($)
ft²
Dec. 31, 2014
USD ($)
Commitment And Contingencies [Line Items]      
Company agreement to lease | ft²   2,819  
Minimum future rental payments due in 2015/2016   $ 67  
Minimum future rental payments due in 2016/2017   69  
Minimum future rental payments due in 2017/2018   53  
Unused commitment   4,112  
Unfunded Balance   22,231 $ 9,860
Lease Commitments [Member]      
Commitment And Contingencies [Line Items]      
Operating lease monthly rental payment for five years   5  
Reinsurance Contracts [Member]      
Commitment And Contingencies [Line Items]      
Minimum future rental payments due in 2015/2016   $ 43,895  
Reinsurance Contract One [Member]      
Commitment And Contingencies [Line Items]      
Reinsurance contract period   2 years  
Reinsurance Contract Two [Member]      
Commitment And Contingencies [Line Items]      
Reinsurance contract period   3 years  
Premium Tax [Member]      
Commitment And Contingencies [Line Items]      
Loss contingency amount   $ 1,754  
Proposed premium tax adjustment with interest $ 1,913    
Loss contingency related to credit disallowance   The auditor's proposed adjustments primarily relate to the Department's proposed disallowance of the entire amount of $1,754 in Florida salary credits applicable to that period.  
Accrued amount   $ 140 $ 140