XML 48 R36.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Investments - Schedule of Credit Quality of Investments With Contractual Maturities (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013
--- | --- | ---
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value | $ 352,983 | $ 289,418
Moody's, Baa3 Rating |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value | 259 |
Moody's, Aaa Rating |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value | $ 7,500 |

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

X
- Definition Amount of available for sale securities with contractual maturities. + References No definition available. + Details
Name: | uve_AvailableForSaleSecuritiesContractualMaturities
Namespace Prefix: | uve_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant