XML 147 R133.htm IDEA: XBRL DOCUMENT
v3.6.0.2

Litigation, Commitments and Contingencies - Additional Information (Detail) $ in Thousands | Dec. 31, 2016 USD ($)
--- | ---
Commitments and Contingencies Disclosure [Line Items] |
Trust preferred securities | $ 15,460

X
- Definition Commitments and Contingencies Disclosure [Line Items] + References No definition available. + Details
Name: | fcbc_CommitmentsAndContingenciesDisclosureLineItems
Namespace Prefix: | fcbc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Trust preferred securities. + References No definition available. + Details
Name: | fcbc_TrustPreferredSecurities
Namespace Prefix: | fcbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant