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Related Party Transactions - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2016
SPC Global RE Advisors LLC [Member]
Related Party Transaction [Line Items]
Consulting agreement terminated date	Sep. 18, 2015

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- 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

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Namespace Prefix:	us-gaap_
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- Definition

Related party transaction agreement termination date.

+ References

No definition available.

+ Details

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Namespace Prefix:	uve_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: