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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

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