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Note 7 - Segment Information (Detail) (Banking [Member])	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Banking [Member]
Percentage of Revenue	91.00%	91.50%

X

- Definition

No authoritative reference available.

+ References

No definition available.

+ Details

Name:	ovbc_PercentageOfRevenue
Namespace Prefix:	ovbc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration