XML 44 R33.htm IDEA: XBRL DOCUMENT
v3.4.0.3

Investments - Schedule of Credit Quality of Investment Securities With Contractual Maturities or The Issuer of Such Securities (Detail) - USD ($) $ in Thousands | Mar. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value | $ 501,230 | $ 441,104
Percentage of Total Fair Value | 100.00% | 100.00%
Comparable Ratings, AAA Rating [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value | $ 105,619 | $ 103,097
Percentage of Total Fair Value | 21.10% | 23.40%
Comparable Ratings, AA Rating [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value | $ 250,589 | $ 189,600
Percentage of Total Fair Value | 50.00% | 43.00%
Comparable Ratings, A Rating [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value | $ 67,894 | $ 83,850
Percentage of Total Fair Value | 13.50% | 19.00%
Comparable Ratings, BBB Rating [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value | $ 72,580 | $ 41,408
Percentage of Total Fair Value | 14.50% | 9.40%
Comparable Ratings, BB+ and Below Rating [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value | $ 1,537 | $ 4,261
Percentage of Total Fair Value | 0.30% | 1.00%
Comparable Ratings, No Rating Available [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value | $ 3,011 | $ 18,888
Percentage of Total Fair Value | 0.60% | 4.20%

X
- 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
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

X
- Definition Represents the amount of certain securities (as a percentage) out of total fixed maturities securities. + References No definition available. + Details
Name: | uve_FixedMaturitiesFairValuePercentage
Namespace Prefix: | uve_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ExternalCreditRatingByGroupingAxis=uve_AAAComparableRatingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ExternalCreditRatingByGroupingAxis=uve_AAComparableRatingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ExternalCreditRatingByGroupingAxis=uve_AComparableRatingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ExternalCreditRatingByGroupingAxis=uve_BBBComparableRatingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ExternalCreditRatingByGroupingAxis=uve_BBPlusAndBelowComparableRatingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ExternalCreditRatingByGroupingAxis=uve_NotRatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |