XML 120 R102.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Liability for Unpaid Losses and Loss Adjustment Expenses - Additional Information (Detail) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Insurance [Abstract] |  |  |
Homeowner's property maximum settlement time | 1 year |  |
Initial case reserve for claims | $ 2,500 |  |
LAE case reserves | 0 |  |
Change in reserve for claims due to re-estimates | $ 4,700,000 | $ 300,000 | $ 700,000

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 Change in reserve for claim liability due to re-estimates. + References No definition available. + Details
Name: | uve_ChangeInReserveForClaimLiabilityDueToReEstimates
Namespace Prefix: | uve_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Home owner property maximum settlement period. + References No definition available. + Details
Name: | uve_HomeOwnerPropertyMaximumSettlementPeriod
Namespace Prefix: | uve_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Initial case reserve claim liability. + References No definition available. + Details
Name: | uve_InitialCaseReserveClaimLiability
Namespace Prefix: | uve_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Liability for unpaid losses and loss adjustment expenses case reserve. + References No definition available. + Details
Name: | uve_LiabilityForUnpaidLossesAndLossAdjustmentExpensesCaseReserve
Namespace Prefix: | uve_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant