Name:	ovbc_ImpairedFinancingReceivablesInterestIncomeAccrualMethod
Namespace Prefix:	ovbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of interest income recognized on a cash-basis method of accounting that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired.

No definition available.

Name:	ovbc_ImpairedFinancingReceivablesInterestIncomeCashBasisMethod
Namespace Prefix:	ovbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

No definition available.

Name:	ovbc_ImpairedFinancingReceivablesRecordedInvestment
Namespace Prefix:	ovbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of allowances for credit losses related to recorded investment.

No definition available.

Name:	ovbc_ImpairedFinancingReceivablesRelatedAllowance
Namespace Prefix:	ovbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses.

No definition available.

Name:	ovbc_ImpairedFinancingReceivablesUnpaidPrincipalBalance
Namespace Prefix:	ovbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of interest income, recognized on accrual basis, on financing receivables that are recognized as impaired, for which there is no related allowance for credit losses.

No definition available.

Name:	ovbc_ImpairedFinancingReceivablesWithNoRelatedAllowanceInterestIncomeAccrualMethod
Namespace Prefix:	ovbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of interest income, recognized on cash basis, on financing receivables, for which there is no related allowance for credit losses and are recognized as impaired.

No definition available.

Name:	ovbc_ImpairedFinancingReceivablesWithNoRelatedAllowanceInterestIncomeCashBasisMethod
Namespace Prefix:	ovbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of investment in impaired financing receivables for which there is no related allowance for credit losses.

No definition available.

Name:	ovbc_ImpairedFinancingReceivablesWithNoRelatedAllowanceRecordedInvestment
Namespace Prefix:	ovbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.

No definition available.

Name:	ovbc_ImpairedFinancingReceivablesWithNoRelatedAllowanceUnpaidPrincipalBalance
Namespace Prefix:	ovbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of average investment of impaired financing receivables for which there is a related allowance for credit losses.

No definition available.

Name:	ovbc_ImpairedFinancingReceivablesWithRelatedAllowanceAverageRecordedInvestment
Namespace Prefix:	ovbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of interest income, recognized on accrual basis, on financing receivables, for which there is a related allowance for credit losses and are recognized as impaired.

No definition available.

Name:	ovbc_ImpairedFinancingReceivablesWithRelatedAllowanceInterestIncomeAccrualMethod
Namespace Prefix:	ovbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of interest income on financing receivables, for which there is a related allowance for credit losses, recognized on a cash-basis method of accounting that the financing receivables were impaired.

No definition available.

Name:	ovbc_ImpairedFinancingReceivablesWithRelatedAllowanceInterestIncomeCashBasisMethod
Namespace Prefix:	ovbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Amount of investment in impaired financing receivables for which there is a related allowance for credit losses.

No definition available.

Name:	ovbc_ImpairedFinancingReceivablesWithRelatedAllowanceRecordedInvestment
Namespace Prefix:	ovbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Unpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.

No definition available.

Name:	ovbc_ImpairedFinancingReceivablesWithRelatedAllowanceUnpaidPrincipalBalance
Namespace Prefix:	ovbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

No definition available.

Name:	ovbc_LoansIndividuallyEvaluatedForImpairmentByClassOfLoansAbstract
Namespace Prefix:	ovbc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

No definition available.

Name:	ovbc_LoansIndividuallyEvaluatedForImpairmentByClassOfLoansWithNoRelatedAllowanceAbstract
Namespace Prefix:	ovbc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

No definition available.

Name:	ovbc_LoansIndividuallyEvaluatedForImpairmentByClassOfLoansWithRelatedAllowanceAbstract
Namespace Prefix:	ovbc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Represents the number of other real estate owned by the entity.

No definition available.

Name:	ovbc_NumberOfOtherRealEstatePropertyOwned
Namespace Prefix:	ovbc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-15

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-17

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

Amount of average investment of impaired financing receivables for which there is no related allowance for credit losses.

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

No definition available.

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

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
-Name Accounting Standards Codification
-Section 50
-Paragraph 35
-SubTopic 10
-Topic 310
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-35

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

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

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

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

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

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