XML 18 R46.htm IDEA: XBRL DOCUMENT v2.4.0.8

Loans - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2014 Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loan portfolio segments	3

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