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Note 3 - Loans and Allowance for Loan Losses (Details) - TDRs Pre-Modification and Post-Modification (Performing Financing Receivable [Member], USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Note 3 - Loans and Allowance for Loan Losses (Details) - TDRs Pre-Modification and Post-Modification [Line Items] |  |
Pre-Modification Recorded Investment | $ 5,875 us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 | $ 2,556 us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2
Post-Modification Recorded Investment | 5,875 us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 | 2,556 us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2
Interest Only Payments [Member] | Commercial Real Estate Owner Occupied [Member] |  |
Note 3 - Loans and Allowance for Loan Losses (Details) - TDRs Pre-Modification and Post-Modification [Line Items] |  |
Pre-Modification Recorded Investment | 457 us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = ovbc_CommercialRealEstateOwnerOccupiedMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = ovbc_InterestOnlyPaymentsMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember |
Post-Modification Recorded Investment | 457 us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = ovbc_CommercialRealEstateOwnerOccupiedMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = ovbc_InterestOnlyPaymentsMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember |
Interest Only Payments [Member] | Commercial and Industrial [Member] |  |
Note 3 - Loans and Allowance for Loan Losses (Details) - TDRs Pre-Modification and Post-Modification [Line Items] |  |
Pre-Modification Recorded Investment | 4,073 us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = ovbc_CommercialAndIndustrialMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = ovbc_InterestOnlyPaymentsMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember | 1,811 us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = ovbc_CommercialAndIndustrialMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = ovbc_InterestOnlyPaymentsMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember
Post-Modification Recorded Investment | 4,073 us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = ovbc_CommercialAndIndustrialMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = ovbc_InterestOnlyPaymentsMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember | 1,811 us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = ovbc_CommercialAndIndustrialMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = ovbc_InterestOnlyPaymentsMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember
Interest Only Payments [Member] | Residential Portfolio Segment [Member] |  |
Note 3 - Loans and Allowance for Loan Losses (Details) - TDRs Pre-Modification and Post-Modification [Line Items] |  |
Pre-Modification Recorded Investment |  | 527 us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = ovbc_InterestOnlyPaymentsMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember
Post-Modification Recorded Investment |  | 527 us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_ResidentialPortfolioSegmentMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = ovbc_InterestOnlyPaymentsMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember
Maturity Extension at Lower Stated Rate Than Market Rate [Member] | Commercial Real Estate Owner Occupied [Member] |  |
Note 3 - Loans and Allowance for Loan Losses (Details) - TDRs Pre-Modification and Post-Modification [Line Items] |  |
Pre-Modification Recorded Investment | 746 us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = ovbc_CommercialRealEstateOwnerOccupiedMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = ovbc_MaturityExtensionAtLowerStatedRateThanMarketRateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember |
Post-Modification Recorded Investment | 746 us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = ovbc_CommercialRealEstateOwnerOccupiedMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = ovbc_MaturityExtensionAtLowerStatedRateThanMarketRateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember |
Maturity Extension at Lower Stated Rate Than Market Rate [Member] | Home Equity Loans [Member] |  |
Note 3 - Loans and Allowance for Loan Losses (Details) - TDRs Pre-Modification and Post-Modification [Line Items] |  |
Pre-Modification Recorded Investment |  | 218 us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = ovbc_HomeEquityLoansMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = ovbc_MaturityExtensionAtLowerStatedRateThanMarketRateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember
Post-Modification Recorded Investment |  | 218 us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = ovbc_HomeEquityLoansMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = ovbc_MaturityExtensionAtLowerStatedRateThanMarketRateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember
Credit Extension at Lower State Rate than Market Rate [Member] | Commercial Real Estate Owner Occupied [Member] |  |
Note 3 - Loans and Allowance for Loan Losses (Details) - TDRs Pre-Modification and Post-Modification [Line Items] |  |
Pre-Modification Recorded Investment | 204 us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = ovbc_CommercialRealEstateOwnerOccupiedMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = ovbc_CreditExtensionAtLowerStateRateThanMarketRateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember |
Post-Modification Recorded Investment | 204 us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = ovbc_CommercialRealEstateOwnerOccupiedMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = ovbc_CreditExtensionAtLowerStateRateThanMarketRateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember |
Credit Extension at Lower State Rate than Market Rate [Member] | Commercial and Industrial [Member] |  |
Note 3 - Loans and Allowance for Loan Losses (Details) - TDRs Pre-Modification and Post-Modification [Line Items] |  |
Pre-Modification Recorded Investment | 395 us-gaap_FinancingReceivableModificationsPreModificationRecordedInvestment2 / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = ovbc_CommercialAndIndustrialMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = ovbc_CreditExtensionAtLowerStateRateThanMarketRateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember |
Post-Modification Recorded Investment | $ 395 us-gaap_FinancingReceivableModificationsPostModificationRecordedInvestment2 / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = ovbc_CommercialAndIndustrialMember / us-gaap_FinancingReceivableTroubledDebtRestructuringAxis = ovbc_CreditExtensionAtLowerStateRateThanMarketRateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PerformingFinancingReceivableMember |

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- Definition Post-modification amount of investment in financing receivables modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953676-111524 + Details
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