Name:	ovbc_DebtInstrumentTermOfVariableRate
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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

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

The last date to redeem the subordinated debentures in CCYY-MM-DD format.

No definition available.

Name:	ovbc_SubordinatedDebenturesAllowedToRedeemableDate
Namespace Prefix:	ovbc_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

Trust preferred securities deferrable period for not considering default related to indenture agreements, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

No definition available.

Name:	ovbc_TrustPreferredSecuritiesDeferrablePeriodForNotConsideringDefault
Namespace Prefix:	ovbc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Interest payable term of trust preferred securities, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

No definition available.

Name:	ovbc_TrustPreferredSecuritiesInterestPayableTerm
Namespace Prefix:	ovbc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The interest rate for trust preferred securities.

No definition available.

Name:	ovbc_TrustPreferredSecuritiesInterestRate
Namespace Prefix:	ovbc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1D
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28555-108399

Name:	us-gaap_DeferredFinanceCostsNet
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The cash inflow from issuance of preferred stocks by a business trust or other special purpose entity, mainly established by a bank holding entity, to third party investors. The trust's assets are deeply subordinated debentures of the bank holding entity. Most trust preferred securities are subject to a mandatory redemption upon the repayment of the debentures.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585