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LOANS AND ALLOWANCE FOR CREDIT LOSSES, Impaired Loans (Details) - Residential Real Estate [Member] $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2025 USD ($) Property	Dec. 31, 2024 USD ($) Property
Loans, Other Information [Abstract]
Number of other real estate owned | Property	0	0
Mortgage loans in process of foreclosure | $	$ 836	$ 342

X

- Definition

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

+ References

No definition available.

+ Details

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

X

- References

No definition available.

+ Details

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

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 35
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481962/310-10-50-35

+ Details

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

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: