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Note 2 - Fair Value of Financial Instruments (Details) (USD $) | 3 Months Ended | 12 Months Ended | 3 Months Ended
--- | --- | --- | ---
Mar. 31, 2015 | Dec. 31, 2014 | Mar. 31, 2014
Note 2 - Fair Value of Financial Instruments (Details) [Line Items] |  |  |
Selling Costs, Percentage | 10.00%ovbc_SellingCostsPercentage |  |
Impaired Financing Receivable, Related Allowance | $ 3,558,000 us-gaap_ImpairedFinancingReceivableRelatedAllowance | $ 3,412,000 us-gaap_ImpairedFinancingReceivableRelatedAllowance |
Other Real Estate | 1,147,000 us-gaap_OtherRealEstate | 1,147,000 us-gaap_OtherRealEstate |
Other Real Estate, Gross |  | 2,217,000 ovbc_OtherRealEstateGross |
Real Estate Owned, Valuation Allowance |  | 1,070,000 us-gaap_RealEstateOwnedValuationAllowance |
SEC Schedule III, Real Estate, Write-down or Reserve, Amount | 0 us-gaap_SECScheduleIIIRealEstateWritedownOrReserveAmount | 88,000 us-gaap_SECScheduleIIIRealEstateWritedownOrReserveAmount |
Collateral Dependent Loans [Member] |  |  |
Note 2 - Fair Value of Financial Instruments (Details) [Line Items] |  |  |
Impaired Financing Receivable, with Related Allowance, Recorded Investment | 12,685,000 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = ovbc_CollateralDependentLoansMember | 12,773,000 us-gaap_ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = ovbc_CollateralDependentLoansMember |
Impaired Financing Receivable, Related Allowance | 3,442,000 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = ovbc_CollateralDependentLoansMember | 3,292,000 us-gaap_ImpairedFinancingReceivableRelatedAllowance / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = ovbc_CollateralDependentLoansMember |
Provision for Loan Losses Expensed | 150,000 us-gaap_ProvisionForLoanLossesExpensed / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = ovbc_CollateralDependentLoansMember |  |
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down | 0 us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = ovbc_CollateralDependentLoansMember |  | 157 us-gaap_FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = ovbc_CollateralDependentLoansMember
Provision Reversal For Loan Losses |  |  | $ 173 ovbc_ProvisionReversalForLoanLosses / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = ovbc_CollateralDependentLoansMember

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- Definition Reflects the amount of the write-down related to a troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554 + Details
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- Definition Carrying amount of other real estate not separately disclosed, including, but not limited to, real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. This does not include real estate assets taken in settlement of troubled loans through surrender or foreclosure. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(4)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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