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Subsequent Events - Additional Information (Detail) (Subsequent Event [Member], USD $) In Millions, unless otherwise specified | 1 Months Ended |
--- | --- | ---
Oct. 18, 2013 | Oct. 04, 2013
Subsequent Event [Member] |  |
Subsequent Event [Line Items] |  |
Financial penalties |  | $ 1.3
Administration fine paid | $ 1.3 |

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- Definition The amount for the individual regulatory current liability as itemized in a table of regulatory current liabilities as of the end of the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 405 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6500807&loc=d3e48068-110394 + Details
Name: | us-gaap_RegulatoryLiabilityCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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- Definition Payments for administrative fine. + References No definition available. + Details
Name: | uve_PaymentsForAdministrativeFine
Namespace Prefix: | uve_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration