Allowance for Loan Losses - Additional Information (Detail)	6 Months Ended
Jun. 30, 2018 USD ($) Loan	Dec. 31, 2017 Loan
Allowance For Loan Losses [Line Items]
Financing receivable recorded investment number of days past due	90 days
Real Estate - Residential [Member]
Allowance For Loan Losses [Line Items]
Foreclosed residential real estate, loan amount	$ 474,000
Residential real estate in process of foreclosure, loan amount	$ 0
Number of nonperforming loans \| Loan	0	0

Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 35
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL49126937-111524

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of decrease in investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate, from foreclosure.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 310
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-29(Footnote 6))
-URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014

+ Details

Name:	us-gaap_MortgageLoansOnRealEstateForeclosures
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Allowance For Loan Losses [Line Items]

+ References

No definition available.

+ Details

Name:	uwhr_AllowanceForLoanLossesLineItems
Namespace Prefix:	uwhr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Financing Receivable Recorded Investment Number Of Period Past Due For Non Accrual Status

+ References

No definition available.

+ Details

Name:	uwhr_FinancingReceivableRecordedInvestmentNumberOfPeriodPastDueForNonAccrualStatus
Namespace Prefix:	uwhr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of largest nonperforming loans.

+ References

No definition available.

+ Details

Name:	uwhr_NumberOfLargestNonperformingLoans
Namespace Prefix:	uwhr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Details

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