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Statutory Accounting and Regulation Statutory Accounting and Regulation - Narrative (Details) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Statutory Accounting Practices [Line Items]      
Statutory Accounting Practices, Statutory Capital and Surplus Required $ 31,690,000us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusRequired    
UPC, Subsidiary [Member]      
Statutory Accounting Practices [Line Items]      
Statutory Accounting Practices, Statutory Net Income Amount (2,366,000)us-gaap_StatutoryAccountingPracticesStatutoryNetIncomeAmount
/ dei_LegalEntityAxis
= uihc_UpcSubsidiaryMember
7,434,000us-gaap_StatutoryAccountingPracticesStatutoryNetIncomeAmount
/ dei_LegalEntityAxis
= uihc_UpcSubsidiaryMember
 
Statutory Accounting Practices, Statutory Capital and Surplus, Balance 123,873,000us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance
/ dei_LegalEntityAxis
= uihc_UpcSubsidiaryMember
  126,249,000us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance
/ dei_LegalEntityAxis
= uihc_UpcSubsidiaryMember
UPC, Subsidiary [Member] | Florida [Member]      
Statutory Accounting Practices [Line Items]      
Statutory Accounting Practices, Statutory Capital and Surplus Required, Percent of Total Liabilities 10.00%uihc_StatutoryAccountingPracticesStatutoryCapitalAndSurplusRequiredPercentOfTotalLiabilities
/ dei_LegalEntityAxis
= uihc_UpcSubsidiaryMember
/ us-gaap_StatutoryAccountingPracticesByJurisdictionAxis
= uihc_FloridaMember
   
Family Security Holdings (FSH) [Member]      
Statutory Accounting Practices [Line Items]      
Statutory Accounting Practices, Statutory Net Income Amount 115,000us-gaap_StatutoryAccountingPracticesStatutoryNetIncomeAmount
/ dei_LegalEntityAxis
= uihc_FamilySecurityHoldingsFSHMember
   
Statutory Accounting Practices, Statutory Capital and Surplus, Balance 8,124,000us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance
/ dei_LegalEntityAxis
= uihc_FamilySecurityHoldingsFSHMember
   
UPC Re, Subsidiary [Member] [Member]      
Statutory Accounting Practices [Line Items]      
Statutory Accounting Practices, Statutory Capital and Surplus, Balance 19,222,000us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance
/ dei_LegalEntityAxis
= uihc_UPCReSubsidiaryMemberMember
  19,048,000us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance
/ dei_LegalEntityAxis
= uihc_UPCReSubsidiaryMemberMember
Minimum [Member] | UPC, Subsidiary [Member] | Florida [Member]      
Statutory Accounting Practices [Line Items]      
Statutory Accounting Practices, Statutory Capital and Surplus Required 5,000,000us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusRequired
/ dei_LegalEntityAxis
= uihc_UpcSubsidiaryMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatutoryAccountingPracticesByJurisdictionAxis
= uihc_FloridaMember
   
Minimum [Member] | Family Security Holdings (FSH) [Member] | Hawaii [Member]      
Statutory Accounting Practices [Line Items]      
Statutory Accounting Practices, Statutory Capital and Surplus Required 3,250,000us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusRequired
/ dei_LegalEntityAxis
= uihc_FamilySecurityHoldingsFSHMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatutoryAccountingPracticesByJurisdictionAxis
= uihc_HawaiiMember
   
Minimum [Member] | UPC Re, Subsidiary [Member] [Member] | Cayman Islands [Member]      
Statutory Accounting Practices [Line Items]      
Statutory Accounting Practices, Statutory Capital and Surplus Required $ 200,000us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusRequired
/ dei_LegalEntityAxis
= uihc_UPCReSubsidiaryMemberMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_StatutoryAccountingPracticesByJurisdictionAxis
= uihc_CaymanIslandsMember