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Note 16 - Segment Information (Detail) (Banking [Member]) | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Banking [Member] |  |  |
Percentage of Revenue | 91.80% | 92.90% | 91.20%

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