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Organization (Details)	12 Months Ended
	Dec. 31, 2012 item segment
Number of divisions	2
Number of bank locations	10
Lynchburg Virginia [Member]
Number of bank locations	5
Limited service bank branch	1
Forest Virginia [Member]
Number of bank locations	1
Madison Heights [Member]
Number of bank locations	1
Amherst Virginia [Member]
Number of bank locations	1
Bedford Virginia [Member]
Number of bank locations	1
Altavista Virginia [Member]
Number of bank locations	1

X

- Definition

Limited Service Bank Banches

+ References

No definition available.

+ Details

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Namespace Prefix:	cik0001275101_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number Of Bank Branches

+ References

No definition available.

+ Details

Name:	cik0001275101_NumberOfBankBranches
Namespace Prefix:	cik0001275101_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration