10-Year Constant Maturity Interest Rate

No definition available.

Name:	uihc_A10YearConstantMaturityInterestRate
Namespace Prefix:	uihc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Actual Written Premiums to Surplus, Ratio

+ References

No definition available.

+ Details

Name:	uihc_ActualWrittenPremiumsToSurplusRatio
Namespace Prefix:	uihc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt instrument capital contribution for surplus definition for purposes of caclulating the required ratios

+ References

No definition available.

+ Details

Name:	uihc_DebtInstrumentSurplusDefinition
Namespace Prefix:	uihc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Ratio of Written Premiums to Surplus Resulting in Increase in Interest Rate

+ References

No definition available.

+ Details

Name:	uihc_RatioOfWrittenPremiumsToSurplusResultingInIncreaseInInterestRate
Namespace Prefix:	uihc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Written Premims to Surplus, Ratio

+ References

No definition available.

+ Details

Name:	uihc_RequiredWrittenPremiumsToSurplusRatio
Namespace Prefix:	uihc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Incremental percentage increase (decrease) in the stated rate on a debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentInterestRateIncreaseDecrease
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

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

- Definition

Carrying value as of the balance sheet date of notes payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

The cash inflow from parent as a source of financing that is recorded as additional paid in capital.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

Name:	us-gaap_ProceedsFromContributionsFromParent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of statutory capital required to be maintained as of the balance sheet date under prescribed or permitted statutory accounting practices.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 505

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6486098&loc=d3e24708-158529

+ Details

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

- Details

Name:	uihc_NotesPayableLenderNameAxis=uihc_FloridaStateBoardOfAdministrationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	uihc_WritingRatioTypesAxis=uihc_GrossWritingRatioMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	uihc_WritingRatioTypesAxis=uihc_NetWritingRatioMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Long-Term Debt Long-Term Debt - Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2012	Dec. 31, 2013
Debt Instrument [Line Items]
Notes payable	$ 13,529,000us-gaap_LongTermNotesPayable		$ 14,706,000us-gaap_LongTermNotesPayable
Statutory Accounting Practices, Statutory Capital and Surplus Required	31,933,000
Proceeds from Contributions from Parent	30,845,000	15,000,000
Debt Instrument, Basis Spread on Variable Rate	45000.00%
10-Year Constant Maturity Interest Rate	2.17%
Debt Instrument, Interest Rate, Increase (Decrease)	2500.00%
Florida State Board of Administration [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	2.50%		2.64%
Debt instrument surplus definition	$ 20,000,000
Gross Writing Ratio [Member] \| Florida State Board of Administration [Member]
Debt Instrument [Line Items]
Required ratio of written premims to surplus	6.00%
Actual ratio of written premiums to surplus	9.60%
Ratio of Written Premiums to Surplus Resulting in Increase in Interest Rate	4.50%
Net Writing Ratio [Member] \| Florida State Board of Administration [Member]
Debt Instrument [Line Items]
Required ratio of written premims to surplus	2.00%
Actual ratio of written premiums to surplus	5.60%
Ratio of Written Premiums to Surplus Resulting in Increase in Interest Rate	1.50%