Note 6 - FDIC Indemnification Asset (Details Textual)	Dec. 31, 2012
Percentage of Loss Covered by FDIC	80.00%

Represents the percentage of loss covered by the FDIC.

No definition available.

Name:	fcbc_PercentageOfLossCoveredByFDIC
Namespace Prefix:	fcbc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant