XML 19 R46.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Loans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 Segment | Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Number of loan portfolio segments | 3 fcbc_NumberOfLoanPortfolioSegments |
Deferred loan fees | $ 3.50 fcbc_DeferredLoanFees | $ 3.39 fcbc_DeferredLoanFees

X
- Definition Deferred Loan Fees + References No definition available. + Details
Name: | fcbc_DeferredLoanFees
Namespace Prefix: | fcbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number Of Loan Portfolio Segments + References No definition available. + Details
Name: | fcbc_NumberOfLoanPortfolioSegments
Namespace Prefix: | fcbc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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