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Regulatory Capital Requirements - Components of Regulatory Capital (Parenthetical) (Detail)
Mar. 31, 2015
Dec. 31, 2014
Home Savings    
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]    
Allowance for loan and allowance for unfunded lending commitments, percentage of risk-weighted assets 1.25%ucfc_TierOneRiskBasedCapitalAllowanceForLoanLossesAndUnfundedLendingCommitmentsToRiskWeightedAssets
/ dei_LegalEntityAxis
= ucfc_HomeSavingsMember		 1.25%ucfc_TierOneRiskBasedCapitalAllowanceForLoanLossesAndUnfundedLendingCommitmentsToRiskWeightedAssets
/ dei_LegalEntityAxis
= ucfc_HomeSavingsMember
United Community    
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]    
Allowance for loan and allowance for unfunded lending commitments, percentage of risk-weighted assets 1.25%ucfc_TierOneRiskBasedCapitalAllowanceForLoanLossesAndUnfundedLendingCommitmentsToRiskWeightedAssets
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember		 1.25%ucfc_TierOneRiskBasedCapitalAllowanceForLoanLossesAndUnfundedLendingCommitmentsToRiskWeightedAssets
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember