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Nature of Operations and Basis of Presentation - Additional Information (Detail) | Dec. 31, 2014 State
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Accounting Policies [Abstract] |
Number of states | 9uve_NumberOfStatesForOfferingPrimaryProduct

X
- Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of states where the insurance entity offers and writes insurance products. + References No definition available. + Details
Name: | uve_NumberOfStatesForOfferingPrimaryProduct
Namespace Prefix: | uve_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant