XML 46 R71.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Fair Value - Additional Information (Detail) (USD $) | 3 Months Ended
--- | ---
Sep. 30, 2013 | Sep. 30, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Transfers between valuation levels for any assets | $ 0 | $ 0

X
- Definition Transfers between valuation levels for any assets. + References No definition available. + Details
Name: | fcbc_TransfersBetweenValuationLevelsForAnyAssets
Namespace Prefix: | fcbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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