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Note 6 - Other Borrowed Funds (Details) - Other Borrowed Funds (USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |
Other borrowed funds | $ 24,648 us-gaap_OtherBorrowings | $ 24,972 us-gaap_OtherBorrowings
Federal Home Loan Bank Advances [Member] |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |
Other borrowed funds | 20,858 us-gaap_OtherBorrowings / us-gaap_LongtermDebtTypeAxis = us-gaap_FederalHomeLoanBankAdvancesMember | 21,181 us-gaap_OtherBorrowings / us-gaap_LongtermDebtTypeAxis = us-gaap_FederalHomeLoanBankAdvancesMember
Promissory Notes [Member] |  |
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items] |  |
Other borrowed funds | $ 3,790 us-gaap_OtherBorrowings / us-gaap_LongtermDebtTypeAxis = ovbc_PromissoryNotesMember | $ 3,791 us-gaap_OtherBorrowings / us-gaap_LongtermDebtTypeAxis = ovbc_PromissoryNotesMember

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- Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

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- Definition The carrying amount as of the balance sheet date for the aggregate of other miscellaneous borrowings owed by the reporting entity. + 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 210.9-03.13,16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13, 16 -Article 9 + Details
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Balance Type: | credit
Period Type: | instant

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Namespace Prefix: |
Data Type: | na
Balance Type: |
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |