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v2.4.1.9

Changes in Receivable from FDIC (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2015 | Mar. 31, 2014
Changes in the receivable from the FDIC |  |
Beginning balance | $ 27,900 us-gaap_FDICIndemnificationAsset | $ 34,691 us-gaap_FDICIndemnificationAsset
Increase (decrease) in estimated losses on covered loans | 46 us-gaap_FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease | (203)us-gaap_FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease
Increase in estimated losses on covered OREO | 69 us-gaap_RealEstateOwnedValuationAllowancePeriodIncreaseDecrease | 149 us-gaap_RealEstateOwnedValuationAllowancePeriodIncreaseDecrease
Reimbursable expenses from the FDIC | 291 fcbc_FdicIndemnificationReimbursableExpensesAccrued | 150 fcbc_FdicIndemnificationReimbursableExpensesAccrued
Net amortization | (1,565)fcbc_FdicIndemnificationAssetAccretionAmortization | (1,134)fcbc_FdicIndemnificationAssetAccretionAmortization
Reimbursements from the FDIC | (688)us-gaap_FDICIndemnificationAssetCashPaymentsReceived | (1,143)us-gaap_FDICIndemnificationAssetCashPaymentsReceived
Ending balance | $ 26,053 us-gaap_FDICIndemnificationAsset | $ 32,510 us-gaap_FDICIndemnificationAsset

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- Definition Increases(decreases) to the indemnification asset due to accretion(amortization) of the loan discount relating to loss sharing agreements with the Federal Deposit Insurance Corporation (FDIC). + References No definition available. + Details
Name: | fcbc_FdicIndemnificationAssetAccretionAmortization
Namespace Prefix: | fcbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition FDIC indemnification reimbursable expenses accrued. + References No definition available. + Details
Name: | fcbc_FdicIndemnificationReimbursableExpensesAccrued
Namespace Prefix: | fcbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Carrying amount of receivable assets originating from the indemnification agreement with the Federal Deposit Insurance Corporation (FDIC), in which the FDIC is to partially cover losses. + References No definition available. + Details
Name: | us-gaap_FDICIndemnificationAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Amount of decreases to the indemnification asset due to cash payments received relating to loss sharing agreements with the Federal Deposit Insurance Corporation (FDIC). + References No definition available. + Details
Name: | us-gaap_FDICIndemnificationAssetCashPaymentsReceived
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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- Definition The increase (decrease) in the allowance for credit losses related to financing receivables. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35738203&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total Increase or Decrease in the real estate owned valuation allowance for period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(4)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_RealEstateOwnedValuationAllowancePeriodIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration