XML 57 R46.htm IDEA: XBRL DOCUMENT v3.8.0.1

Reinsurance - Current Ratings from Rating Agencies and Unsecured Net Amounts Due from Reinsurers Whose Aggregate Balance Exceeded 3% of Stockholders' Equity (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Ceded Credit Risk [Line Items]
Reinsurance unsecured amounts due from reinsurers total	$ 59,829	$ 180,172
Allianz Risk Transfer [Member] | AM Best Company A+ [Member] | Standard and Poor's AA- [Member]
Ceded Credit Risk [Line Items]
Reinsurance unsecured amounts due from reinsurers total	39,007	105,573
Florida Hurricane Catastrophe Fund [Member]
Ceded Credit Risk [Line Items]
Reinsurance unsecured amounts due from reinsurers total	$ 20,822	52,054
Renaissance Reinsurance Ltd [Member] | AM Best Company A+ [Member] | Standard and Poor's AA- [Member] | Moody's Investors Service A1 [Member]
Ceded Credit Risk [Line Items]
Reinsurance unsecured amounts due from reinsurers total		$ 22,545

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

X

- Definition

Represents total unsecured net amounts due from reinsurers whose aggregate balance exceeded 3% of stockholders' equity as of the reporting date.

+ References

No definition available.

+ Details

Name:	uve_ReinsuranceUnsecuredAmountsDueFromReinsurers
Namespace Prefix:	uve_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_CededCreditRiskAxis=uve_AllianzRiskTransferMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditRatingAMBestAxis=us-gaap_AMBestAPlusRatingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditRatingStandardPoorsAxis=us-gaap_StandardPoorsAAMinusRatingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CededCreditRiskAxis=uve_FloridaHurricaneCatastropheFundMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CededCreditRiskAxis=uve_RenaissanceReinsuranceLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditRatingMoodysAxis=us-gaap_MoodysA1RatingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: