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Related Party Transactions - Additional Information (Detail) | 9 Months Ended
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Sep. 30, 2016
SPC Global RE Advisors LLC [Member] |
Related Party Transaction [Line Items] |
Consulting agreement terminated date | Sep. 18, 2015

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

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- Definition Related party transaction agreement termination date. + References No definition available. + Details
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Namespace Prefix: | uve_
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Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |