XML 79 R65.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Commitments and Contingencies - Additional Information (Detail) - USD ($) | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Reinsurance Retention Policy [Line Items] |  |
Reinsurance payable, net | $ 261,133,000 | $ 110,381,000
Period from June 1, 2019 to May 31, 2020 [Member] |  |
Reinsurance Retention Policy [Line Items] |  |
Reinsurance payable, net | 82,300 |
Period from June 1, 2020 to May 31, 2021 [Member] |  |
Reinsurance Retention Policy [Line Items] |  |
Reinsurance payable, net | $ 33,900 |

X
- Definition The carrying amount as of the balance sheet date of the known and estimated amounts owed to insurers under reinsurance treaties or other arrangements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.13(a)(3),(c)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
Name: | us-gaap_ReinsurancePayable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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_ReinsuranceRetentionPolicyLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ReinsurancePolicyTypeAxis=uve_PeriodFromJuneOneTwoThousandNinteenToMayThirtyOneTwoThousandTwentyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ReinsurancePolicyTypeAxis=uve_PeriodFromJuneOneTwoThousandTwentyToMayThirtyOneTwoThousandTwentyOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |