Allowance for Credit Losses on Loans - Summary of Activity Related to Allowance for Credit Losses on Loans (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of year	$ 2,290	$ 4,026
Provision for (recovery of) credit losses	291	118
Charge-offs	(421)	(6)
Recoveries	29	18
Net (charge-offs) recoveries	(392)	12
Balance, beginning of year	4,596	4,156
Cumulative Effect of Change in Accounting Principle [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of year	2,407
Commercial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of year	1,376	2,429
Provision for (recovery of) credit losses		190
Recoveries		7
Net (charge-offs) recoveries		7
Balance, beginning of year		2,626
Non-Commercial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of year	914	1,597
Provision for (recovery of) credit losses		(72)
Charge-offs		(6)
Recoveries		11
Net (charge-offs) recoveries		5
Balance, beginning of year		$ 1,530
Commercial [Member] \| Commercial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of year	435
Provision for (recovery of) credit losses	213
Charge-offs	(343)
Recoveries	3
Net (charge-offs) recoveries	(340)
Balance, beginning of year	1,010
Commercial [Member] \| Commercial [Member] \| Cumulative Effect of Change in Accounting Principle [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of year	702
Real Estate Commercial [Member] \| Commercial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of year	760
Provision for (recovery of) credit losses	83
Balance, beginning of year	1,860
Real Estate Commercial [Member] \| Commercial [Member] \| Cumulative Effect of Change in Accounting Principle [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of year	1,017
Other Real Estate Construction [Member] \| Commercial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of year	177
Provision for (recovery of) credit losses	47
Charge-offs	(42)
Net (charge-offs) recoveries	(42)
Balance, beginning of year	325
Other Real Estate Construction [Member] \| Commercial [Member] \| Cumulative Effect of Change in Accounting Principle [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of year	143
Other Loans [Member] \| Commercial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of year	4
Provision for (recovery of) credit losses	(2)
Balance, beginning of year	7
Other Loans [Member] \| Commercial [Member] \| Cumulative Effect of Change in Accounting Principle [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of year	5
Real Estate - Residential [Member] \| Non-Commercial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of year	561
Provision for (recovery of) credit losses	21
Recoveries	1
Net (charge-offs) recoveries	1
Balance, beginning of year	657
Real Estate - Residential [Member] \| Non-Commercial [Member] \| Cumulative Effect of Change in Accounting Principle [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of year	74
Home Equity [Member] \| Non-Commercial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of year	277
Provision for (recovery of) credit losses	(86)
Recoveries	1
Net (charge-offs) recoveries	1
Balance, beginning of year	567
Home Equity [Member] \| Non-Commercial [Member] \| Cumulative Effect of Change in Accounting Principle [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of year	375
Consumers Loans [Member] \| Non-Commercial [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of year	76
Provision for (recovery of) credit losses	15
Charge-offs	(36)
Recoveries	24
Net (charge-offs) recoveries	(12)
Balance, beginning of year	170
Consumers Loans [Member] \| Non-Commercial [Member] \| Cumulative Effect of Change in Accounting Principle [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Balance, beginning of year	$ 91

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(4)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

+ Details

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

- Definition

Amount of other addition (reduction) in allowance reserve for credit loss.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524

+ Details

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

- Definition

Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(3)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

+ Details

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

- Definition

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.

+ References

No definition available.

+ Details

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

- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 6.L.1)
-URI https://asc.fasb.org/extlink&oid=122038336&loc=d3e74567-122707

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)(1)(ii)
-URI https://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

+ Details

Name:	us-gaap_LoansAndLeasesReceivableAllowance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of expense related to estimated loss from loan and lease transactions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(2)
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524

+ Details

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

- Details

Name:	us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=srt_RevisionOfPriorPeriodChangeInAccountingPrincipleAdjustmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=uwhr_ResidentialRealEstateLoanMember
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:

- Details

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