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LOANS AND ALLOWANCE FOR CREDIT LOSSES, Credit Quality Indicators (Details) $ in Thousands	Sep. 30, 2025 USD ($)
CARES Act [Member]
Credit Quality Indicators [Abstract]
Aggregate borrowing amount	$ 1,000

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- References

No definition available.

+ Details

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

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- Definition

Minimum loan balance for impaired loans on nonaccrual status or nonperforming in nature.

+ References

No definition available.

+ Details

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

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- Details

Name:	us-gaap_LoanRestructuringModificationNameAxis=ovbc_CARESActMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: