Loans - Loans by Class Modified as Troubled Debt Restructurings (Detail) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2015 USD ($) SecurityLoan	Jun. 30, 2014 USD ($) SecurityLoan	Jun. 30, 2015 USD ($) SecurityLoan	Jun. 30, 2014 USD ($) SecurityLoan
Financing Receivable Modifications [Line Items]
Number of Loans \| SecurityLoan	9	20	16	40
Pre-Modification Outstanding Recorded Investment	$ 597	$ 1,387	$ 1,392	$ 2,628
Post-Modification Recorded Investment	$ 605	$ 1,419	$ 1,413	$ 2,674
Commercial Loans [Member]
Financing Receivable Modifications [Line Items]
Number of Loans \| SecurityLoan				1
Pre-Modification Outstanding Recorded Investment				$ 120
Post-Modification Recorded Investment				$ 120
Commercial Loans [Member] \| Nonresidential [Member]
Financing Receivable Modifications [Line Items]
Number of Loans \| SecurityLoan				1
Pre-Modification Outstanding Recorded Investment				$ 120
Post-Modification Recorded Investment				$ 120
Residential Mortgage Loans [Member]
Financing Receivable Modifications [Line Items]
Number of Loans \| SecurityLoan	5	11	10	20
Pre-Modification Outstanding Recorded Investment	$ 469	$ 922	$ 910	$ 1,491
Post-Modification Recorded Investment	$ 476	$ 969	$ 930	$ 1,545
Residential Mortgage Loans [Member] \| One-to Four-Family [Member]
Financing Receivable Modifications [Line Items]
Number of Loans \| SecurityLoan	5	11	10	20
Pre-Modification Outstanding Recorded Investment	$ 469	$ 922	$ 910	$ 1,491
Post-Modification Recorded Investment	$ 476	$ 969	$ 930	$ 1,545
Consumer Loans [Member]
Financing Receivable Modifications [Line Items]
Number of Loans \| SecurityLoan	4	9	6	19
Pre-Modification Outstanding Recorded Investment	$ 128	$ 465	$ 482	$ 1,017
Post-Modification Recorded Investment	$ 129	$ 450	$ 483	$ 1,009
Consumer Loans [Member] \| Home Equity [Member]
Financing Receivable Modifications [Line Items]
Number of Loans \| SecurityLoan	4	9	6	19
Pre-Modification Outstanding Recorded Investment	$ 128	$ 465	$ 482	$ 1,017
Post-Modification Recorded Investment	$ 129	$ 450	$ 483	$ 1,009

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.

No definition available.

+ Details

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

- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 33

-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953676-111524

+ Details

Name:	us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

+ Details

Name:	us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Pre-modification amount of investment in financing receivables modified by troubled debt restructurings.

+ References

+ Details

Name:	us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=ucfc_NonresidentialLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ResidentialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=ucfc_OneToFourFamilyResidentialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: