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Commitments and Contingencies - Additional Information (Detail) (USD $) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2013 | Jul. 12, 2013 sqft
Commitments And Contingencies Disclosure [Abstract] |  |
Office building rentable area |  | 29,018
Monthly rent for property | $ 51,000 |
Term of lease | 10 years |
Purchase of property latest time period | 2015-02 |
Purchase price of property | $ 5,990,000 |

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- Details
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- Definition Agreed monthly lease rent. + References No definition available. + Details
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Namespace Prefix: | uve_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Agreed purchase price of property. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Area of leased facility. + References No definition available. + Details
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- Definition Lease agreement purchase of property latest time period. + References No definition available. + Details
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- Definition Lease agreement term subject to property purchase. + References No definition available. + Details
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