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Note 4 - Loans and Allowance for Loan Losses (Details) - Allowance for Loan Losses Activity (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Allowance for loan losses:
Beginning balance	$ 6,672	$ 6,847	$ 6,905	$ 7,344
Provision for loan losses	(189)	524	(158)	1,840
Loans charged off	(384)	(445)	(1,180)	(2,723)
Recoveries	369	601	901	1,066
Total ending allowance balance	6,468	7,527	6,468	7,527
Residential Portfolio Segment [Member]
Allowance for loan losses:
Beginning balance	1,314	1,491	1,329	1,730
Provision for loan losses	(182)	18	145	295
Loans charged off	(100)	(85)	(457)	(678)
Recoveries	160	19	175	96
Total ending allowance balance	1,192	1,443	1,192	1,443
Commercial Real Estate Portfolio Segment [Member]
Allowance for loan losses:
Beginning balance	3,744	3,423	3,946	3,623
Provision for loan losses	(715)	1,004	(1,193)	1,896
Loans charged off	0	(62)	(2)	(1,158)
Recoveries	5	4	283	8
Total ending allowance balance	3,034	4,369	3,034	4,369
Commercial and Industrial [Member]
Allowance for loan losses:
Beginning balance	761	623	783	636
Provision for loan losses	565	(319)	532	(407)
Loans charged off	0	0	0	(70)
Recoveries	16	349	27	494
Total ending allowance balance	1,342	653	1,342	653
Consumer Portfolio Segment [Member]
Allowance for loan losses:
Beginning balance	853	1,310	847	1,355
Provision for loan losses	143	(179)	358	56
Loans charged off	(284)	(298)	(721)	(817)
Recoveries	188	229	416	468
Total ending allowance balance	$ 900	$ 1,062	$ 900	$ 1,062

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=28368275&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=28368275&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=28368275&loc=SL6953423-111524

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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 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524



Reference 4: 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

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