XML 83 R85.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Litigation, Commitments and Contingencies - Additional Information (Detail) (USD $) | Mar. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Commitments and Contingencies Disclosure [Line Items] |  |
Commitments to extend credit | $ 203,658,000 us-gaap_LettersOfCreditOutstandingAmount | $ 236,471,000 us-gaap_LettersOfCreditOutstandingAmount
Trust preferred securities | 15,460,000 fcbc_TrustPreferredSecurities |
FHLB Borrowings |  |
Commitments and Contingencies Disclosure [Line Items] |  |
Commitments to extend credit | $ 6,180,000 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_FairValueByLiabilityClassAxis = us-gaap_FederalHomeLoanBankBorrowingsMember | $ 6,180,000 us-gaap_LettersOfCreditOutstandingAmount / us-gaap_FairValueByLiabilityClassAxis = us-gaap_FederalHomeLoanBankBorrowingsMember

X
- 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

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueByLiabilityClassAxis=us-gaap_FederalHomeLoanBankBorrowingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |