Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
Dec. 31, 2014 Segment Office Branch	Dec. 31, 2013
Summary Of Significant Accounting Policies [Line Items]
Number of full-service branches	32ucfc_NumberOfFullServiceBranches
Number of loan production offices	9ucfc_NumberOfLoanProductionOffices
Number of operating segment	1us-gaap_NumberOfOperatingSegments
Percentage value of estimated real estate	90.00%
Goodwill	$ 0us-gaap_Goodwill	$ 0us-gaap_Goodwill
Recognized tax benefit	50.00%
Postretirement medical benefits number of years of service for eligibility	20 years
Postretirement medical benefits number of age of service for eligibility	60 years
Number of shares remaining to allocate ESOP participants	0
Termination period of ESOP plan	2014-11
Minimum [Member] \| Buildings [Member]
Summary Of Significant Accounting Policies [Line Items]
Term of lease	20 years
Minimum [Member] \| Furniture and Fixtures [Member]
Summary Of Significant Accounting Policies [Line Items]
Term of lease	3 years
Maximum [Member] \| Buildings [Member]
Summary Of Significant Accounting Policies [Line Items]
Term of lease	40 years
Maximum [Member] \| Furniture and Fixtures [Member]
Summary Of Significant Accounting Policies [Line Items]
Term of lease	5 years

Employee Stock Ownership Plan, termination period.

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- Definition

Loans as maximum percentage of real estate.

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- Definition

Minimum age to qualify for postretirement medical benefits.

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- Definition

Minimum year of service to qualify for postretirement medical benefits.

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- Definition

Number of full service branches.

+ References

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- Definition

Number of loan production offices.

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- Definition

Percentage of tax benefit likelihood to be realized upon examination.

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- Definition

Sum of the allocated, committed-to-be-released and suspense shares of the entity held by the plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 40

-Section 50

-Paragraph 1

-Subparagraph (d)

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

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-Section 45

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- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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