XML 19 R121.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Components of Other Operating Expense (Parenthetical) (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2013
Component of Operating Other Cost and Expense [Abstract] |
Percentage of other operating income | 1.00%

X
- Definition Percentage Of Operating Income + References No definition available. + Details
Name: | fcbc_PercentageOfOperatingIncome
Namespace Prefix: | fcbc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ComponentOfOperatingOtherCostAndExpenseLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration