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Note 2 - Fair Value of Financial Instruments (Detail) - Level 3 Fair Value Measurements (USD $) In Thousands, unless otherwise specified | 9 Months Ended
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Sep. 30, 2012
Commercial Real Estate Nonowner Occupied [Member] | Minimum [Member] | Capitalization Rate [Member] | Borrower B [Member] |
Commercial real estate: |
Range | 10%
Commercial Real Estate Nonowner Occupied [Member] | Maximum [Member] | Capitalization Rate [Member] | Borrower B [Member] |
Commercial real estate: |
Range | 20%
Commercial Real Estate Nonowner Occupied [Member] | Weighted Average [Member] | Capitalization Rate [Member] | Borrower B [Member] |
Commercial real estate: |
Range | 15%
Commercial Real Estate Nonowner Occupied [Member] | Capitalization Rate [Member] | Borrower B [Member] |
Commercial real estate: |
Fair Value (in Dollars) | 2,380
Valuation Technique(s) | Income approach
Unobservable Input(s) | Capitalization rate
Range | -
Commercial Real Estate Construction Financing Receivable [Member] | Weighted Average [Member] |
Commercial real estate: |
Range | 10%
Commercial Real Estate Construction Financing Receivable [Member] |
Commercial real estate: |
Fair Value (in Dollars) | 395
Valuation Technique(s) | Income approach
Unobservable Input(s) | Capitalization rate
Range | 10%

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- Details
Name: | ovbc_CommercialRealEstateAbstract000
Namespace Prefix: | ovbc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition No authoritative reference available. + References No definition available. + Details
Name: | ovbc_FairValueRange
Namespace Prefix: | ovbc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition No authoritative reference available. + References No definition available. + Details
Name: | ovbc_FairValueUnobservableInputs
Namespace Prefix: | ovbc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
Name: | us-gaap_AssetsFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Description of the inputs and valuation technique(s) used to measure fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258 + Details
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