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Note 4 - Loans and Allowance for Loan Losses (Details) - Allowance for Loan Losses Activity, by Portfolio Segment (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Allowance for loan losses:
Beginning balance	$ 6,462	$ 6,672	$ 6,155	$ 6,905
Provision for Loan Losses	1,386	(189)	1,880	(158)
Loans charged off	(340)	(384)	(806)	(1,180)
Recoveries	420	369	699	901
Total ending allowance balance	7,928	6,468	7,928	6,468
Residential Portfolio Segment [Member]
Allowance for loan losses:
Beginning balance	1,516	1,314	1,250	1,329
Provision for Loan Losses	444	(182)	751	145
Loans charged off	(139)	(100)	(193)	(457)
Recoveries	136	160	149	175
Total ending allowance balance	1,957	1,192	1,957	1,192
Commercial Real Estate Portfolio Segment [Member]
Allowance for loan losses:
Beginning balance	2,740	3,744	2,807	3,946
Provision for Loan Losses	383	(715)	451	(1,193)
Loans charged off			(157)	(2)
Recoveries	48	5	70	283
Total ending allowance balance	3,171	3,034	3,171	3,034
Commercial and Industrial [Member]
Allowance for loan losses:
Beginning balance	1,357	761	1,305	783
Provision for Loan Losses	201	565	173	532
Loans charged off	(4)		(4)
Recoveries	97	16	177	27
Total ending allowance balance	1,651	1,342	1,651	1,342
Consumer Portfolio Segment [Member]
Allowance for loan losses:
Beginning balance	849	853	793	847
Provision for Loan Losses	358	143	505	358
Loans charged off	(197)	(284)	(452)	(721)
Recoveries	139	188	303	416
Total ending allowance balance	$ 1,149	$ 900	$ 1,149	$ 900

X

- Details

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

X

- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524

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Period Type:	instant

X

- Definition

Amount of recovery of financing receivables doubtful of collection that were previously charged off.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)(4)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524

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- Definition

Amount of direct write-downs of financing receivables charged against the allowance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)(3)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524

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Period Type:	duration

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- Definition

Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 11

-Article 9



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.11)

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524

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