XML 36 R31.htm IDEA: XBRL DOCUMENT v3.2.0.727

Nature of Operations and Basis of Presentation - Additional Information (Detail)	Jun. 30, 2015 State
Accounting Policies [Abstract]
Number of states	10

X

- References

No definition available.

+ Details

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

X

- Definition

Number of states where the insurance entity offers and writes insurance products.

+ References

No definition available.

+ Details

Name:	uve_NumberOfStatesForOfferingPrimaryProduct
Namespace Prefix:	uve_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant