XML 69 R55.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Liability for Unpaid Losses and Loss Adjustment Expenses - Additional Information (Detail) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 USD ($) | Jun. 30, 2017 USD ($) | Jun. 30, 2018 USD ($) Claim | Jun. 30, 2017 USD ($) | Mar. 31, 2018 USD ($)
Insurance [Abstract] |  |  |  |  |
Incurred (recovered) related to prior years , net reserve developmenet | $ 2,310 | $ 1,109 | $ 2,266 | $ 1,205 |
Loss reserve development on direct basis | 5,300 | 6,600 | 5,300 | 6,600 |
Loss reserve development on net basis | 2,600 | $ 1,100 | $ 2,600 | $ 1,100 |
Number Of Remaining Claims | Claim |  |  | 78 |  |
Estimated of ultimate losses on storm | 603,500 |  | $ 603,500 |  | $ 447,400
Prior year development gross losses | 156,100 |  |  |  |
Net retention benefit from prior year development losses | $ 300 |  |  |  |

X
- References No definition available. + Details
Name: | us-gaap_InsuranceAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after effects of reinsurance, of expense (reversal of expense) for claims incurred in prior reporting periods and related claims settlement costs. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=99382578&loc=d3e14764-158437 + Details
Name: | us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Estimated of ultimate losses on storm. + References No definition available. + Details
Name: | uve_EstimatedOfUltimateLossesOnStorm
Namespace Prefix: | uve_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loss reserve development on direct basis. + References No definition available. + Details
Name: | uve_LossReserveDevelopmentOnDirectBasis
Namespace Prefix: | uve_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Loss reserve development on net basis. + References No definition available. + Details
Name: | uve_LossReserveDevelopmentOnNetBasis
Namespace Prefix: | uve_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Net retention benefit from prior year development losses. + References No definition available. + Details
Name: | uve_NetRetentionBenefitFromPriorYearDevelopmentLosses
Namespace Prefix: | uve_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of remaining claims. + References No definition available. + Details
Name: | uve_NumberOfRemainingClaims
Namespace Prefix: | uve_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Prior year development gross losses. + References No definition available. + Details
Name: | uve_PriorYearDevelopmentGrossLosses
Namespace Prefix: | uve_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration