Income Taxes Schedule of Deferred Tax Assets (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Deferred Tax Asset, Unearned Premiums	$ 13,483uihc_DeferredTaxAssetUnearnedPremiums	$ 11,370uihc_DeferredTaxAssetUnearnedPremiums
Deferred Tax Assets, Assessments	0uihc_DeferredTaxAssetsAssessments	30uihc_DeferredTaxAssetsAssessments
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Policyholder Liabilities	671	682
Deferred Tax Asset, Bad Debt Expense	13uihc_DeferredTaxAssetBadDebtExpense	11uihc_DeferredTaxAssetBadDebtExpense
Deferred Tax Asset, Other-than-temporary-impairment	56	56
Deferred Tax Assets, Other	651us-gaap_DeferredTaxAssetsOther	873us-gaap_DeferredTaxAssetsOther
Deferred Tax Assets, Gross	14,874us-gaap_DeferredTaxAssetsGross	13,022us-gaap_DeferredTaxAssetsGross
Deferred Tax Liability, Unrealized Gain	2,526uihc_DeferredTaxLiabilityUnrealizedGain	58uihc_DeferredTaxLiabilityUnrealizedGain
Deferred Tax Liabilities, Deferred Expense, Deferred Policy Acquisition Cost	12,128	11,061
Deferred Tax Liabilities, Intangible Assets	443	294
Deferred Tax Liabilities, Other	772us-gaap_DeferredTaxLiabilitiesOther	1,317us-gaap_DeferredTaxLiabilitiesOther
Deferred Tax Liabilities, Gross	15,869us-gaap_DeferredIncomeTaxLiabilities	12,730us-gaap_DeferredIncomeTaxLiabilities
Deferred Tax Assets, Net	$ (995)us-gaap_DeferredTaxAssetsLiabilitiesNet	$ 292us-gaap_DeferredTaxAssetsLiabilitiesNet

Deferred Tax Asset, Bad Debt Expense

No definition available.

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- Definition

Deferred Tax Asset, Other-than-temporary-impairment

+ References

No definition available.

+ Details

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- Definition

Deferred Tax Assets, Assessments

+ References

No definition available.

+ Details

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- Definition

Deferred Tax Asset, Unearned Premiums

+ References

No definition available.

+ Details

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- Definition

Deferred Tax Liability, Unrealized Gain

+ References

No definition available.

+ Details

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- Definition

Amount of deferred tax liability attributable to taxable temporary differences.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Deferred Tax Liability

-URI http://asc.fasb.org/extlink&oid=6510232

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Subparagraph b(2)

-Article 7

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- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Deferred Tax Asset

-URI http://asc.fasb.org/extlink&oid=6510090

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- Definition

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

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- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences not separately disclosed.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 25

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319

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- Definition

The tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from estimated policyholder reserves, which will be deductible from future taxable income when actual costs are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the tax deduction to be taken.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 25

-Paragraph 20

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=29652012&loc=d3e28680-109314

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- Definition

The amount as of the balance sheet date of the estimated future tax effects attributable to policy acquisition costs being expensed for tax purposes but capitalized in conformity with generally accepted accounting principles, which will reverse in future periods when amortization of such capitalized costs cannot be deducted for tax purposes.

+ References

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- Definition

Amount of deferred tax liability attributable to taxable temporary differences from intangible assets other than goodwill.

+ References

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- Definition

Amount of deferred tax liability attributable to taxable temporary differences not separately disclosed.

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