XML 48 R34.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Investments - Schedule of Credit Quality of Investment Securities With Contractual Maturities or The Issuer of Such Securities (Detail) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value | $ 602,676 | $ 589,363
Percentage of Total Fair Value | 100.00% | 100.00%
Comparable Ratings, AAA Rating [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value | $ 129,495 | $ 131,260
Percentage of Total Fair Value | 21.50% | 22.30%
Comparable Ratings, AA Rating [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value | $ 282,340 | $ 275,480
Percentage of Total Fair Value | 46.90% | 46.70%
Comparable Ratings, A Rating [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value | $ 111,734 | $ 107,418
Percentage of Total Fair Value | 18.50% | 18.20%
Comparable Ratings, BBB Rating [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value | $ 70,754 | $ 67,263
Percentage of Total Fair Value | 11.70% | 11.40%
Comparable Ratings, BB+ and Below Rating [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value | $ 3,706 | $ 3,444
Percentage of Total Fair Value | 0.60% | 0.60%
Comparable Ratings, No Rating Available [Member] |  |
Schedule Of Available For Sale Securities [Line Items] |  |
Fair Value | $ 4,647 | $ 4,498
Percentage of Total Fair Value | 0.80% | 0.80%

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: |