XML 48 R34.htm IDEA: XBRL DOCUMENT v3.10.0.1

Investments - Cost or Amortized Cost and Fair Value of Debt and Short-term Investment Securities Available for Sale (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Schedule Of Available For Sale Securities [Line Items]
Debt Securities, Cost or Amortized Cost	$ 773,493
Available-for-sale debt securities	760,408	$ 639,334
Total Cost or Amortized Cost	773,493	653,715
Total Gross Unrealized Gains	776	1,579
Total Gross Unrealized Losses	(13,861)	(5,960)
Total Fair Value	760,408	649,334
Short-term investments, Cost or Amortized Cost		10,000
Short-term investments, Fair Value		10,000
U.S. Government Obligations and Agencies [Member]
Schedule Of Available For Sale Securities [Line Items]
Debt Securities, Cost or Amortized Cost	67,442	60,481
Debt Securities, Gross Unrealized Gains	15
Debt Securities, Gross Unrealized Losses	(1,459)	(877)
Available-for-sale debt securities	65,998	59,604
Corporate Bonds [Member]
Schedule Of Available For Sale Securities [Line Items]
Debt Securities, Cost or Amortized Cost	415,600	228,336
Debt Securities, Gross Unrealized Gains	532	476
Debt Securities, Gross Unrealized Losses	(6,165)	(1,308)
Available-for-sale debt securities	409,967	227,504
Mortgage-Backed and Asset-Backed Securities [Member]
Schedule Of Available For Sale Securities [Line Items]
Debt Securities, Cost or Amortized Cost	275,128	221,956
Debt Securities, Gross Unrealized Gains	23	19
Debt Securities, Gross Unrealized Losses	(5,923)	(2,523)
Available-for-sale debt securities	269,228	219,452
Municipal Bonds [Member]
Schedule Of Available For Sale Securities [Line Items]
Debt Securities, Cost or Amortized Cost	3,401	120,883
Debt Securities, Gross Unrealized Gains		599
Debt Securities, Gross Unrealized Losses	(123)	(1,187)
Available-for-sale debt securities	3,278	120,295
Redeemable Preferred Stock [Member]
Schedule Of Available For Sale Securities [Line Items]
Debt Securities, Cost or Amortized Cost	11,922	12,059
Debt Securities, Gross Unrealized Gains	206	485
Debt Securities, Gross Unrealized Losses	(191)	(65)
Available-for-sale debt securities	$ 11,937	$ 12,479

X

- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563

+ Details

Name:	us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563

+ Details

Name:	us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563

+ Details

Name:	us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109979856&loc=d3e26610-111562

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesDebtSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of investment in marketable security.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.4)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_MarketableSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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

X

- Definition

Available for sale debt securities and marketable securities.

+ References

No definition available.

+ Details

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

X

- Definition

Available for sale debt securities and marketable securities accumulated gross unrealized gain before tax.

+ References

No definition available.

+ Details

Name:	uve_AvailableForSaleDebtSecuritiesAndMarketableSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix:	uve_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Available for sale debt securities and marketable securities accumulated gross unrealized loss before tax.

+ References

No definition available.

+ Details

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

X

- Definition

Available for sale debt securities and marketable securities amortized cost basis.

+ References

No definition available.

+ Details

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

X

- Definition

Marketable securities amortized cost.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentCorporationsAndAgenciesSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=uve_MortgageBackedAndAssetBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_RedeemablePreferredStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: