XML 16 R55.htm IDEA: XBRL DOCUMENT v2.4.1.9

Loans Held for Investment by Internal Credit Risk Grade (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	$ 1,558,310us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome	$ 1,567,176us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
Covered under loss share agreements	112,724us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered	122,240us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered
Total loans	1,671,034fcbc_LoansAndLeasesReceivableNetOfDeferredIncomeCoveredAndNotCovered	1,689,416fcbc_LoansAndLeasesReceivableNetOfDeferredIncomeCoveredAndNotCovered
Commercial Loans
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	846,191us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember	862,043us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Commercial Loans | Construction Development And Other Land
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	39,628us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_ConstructionDevelopmentAndOtherLandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember	41,271us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_ConstructionDevelopmentAndOtherLandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Covered under loss share agreements	10,410us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_ConstructionDevelopmentAndOtherLandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember	13,100us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_ConstructionDevelopmentAndOtherLandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Commercial Loans | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	78,482us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_CommercialAndIndustrialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember	83,099us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_CommercialAndIndustrialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Covered under loss share agreements	2,371us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_CommercialAndIndustrialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember	2,662us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_CommercialAndIndustrialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Commercial Loans | Multi-family Residential
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	97,295us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_MultiFamilyResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember	97,480us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_MultiFamilyResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Covered under loss share agreements	678us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_MultiFamilyResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember	1,584us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_MultiFamilyResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Commercial Loans | Single-family Non-owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	137,436us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyNonOwnerOccupiedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember	135,171us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyNonOwnerOccupiedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Covered under loss share agreements	4,846us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyNonOwnerOccupiedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember	5,918us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyNonOwnerOccupiedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Commercial Loans | Non-farm, Non-residential
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	463,035us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_NonFarmNonResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember	473,906us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_NonFarmNonResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Covered under loss share agreements	24,672us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_NonFarmNonResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember	25,317us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_NonFarmNonResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Commercial Loans | Agricultural
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	1,671us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_AgriculturalMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember	1,599us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_AgriculturalMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Covered under loss share agreements	42us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_AgriculturalMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember	43us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_AgriculturalMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Commercial Loans | Farmland Loan
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	28,644us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_FarmlandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember	29,517us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_FarmlandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Covered under loss share agreements	697us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_FarmlandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember	716us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_FarmlandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember
Consumer Real Estate
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	635,799us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember	629,231us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember
Consumer Real Estate | Home Equity Lines
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	109,158us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember	110,957us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember
Covered under loss share agreements	57,415us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember	60,391us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember
Consumer Real Estate | Single Family Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	491,317us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyOwnerOccupiedLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember	485,475us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyOwnerOccupiedLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember
Covered under loss share agreements	10,994us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyOwnerOccupiedLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember	11,968us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyOwnerOccupiedLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember
Consumer Real Estate | Owner Occupied Construction
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	35,324us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_OwnerOccupiedConstructionMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember	32,799us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_OwnerOccupiedConstructionMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember
Covered under loss share agreements	512us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_OwnerOccupiedConstructionMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember	453us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_OwnerOccupiedConstructionMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember
Consumer and Other | Consumer Loan
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	69,084us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerAndOtherPortfolioSegmentMember	69,347us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerAndOtherPortfolioSegmentMember
Covered under loss share agreements	87us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerAndOtherPortfolioSegmentMember	88us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerAndOtherPortfolioSegmentMember
Consumer and Other | Other
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	7,236us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_OtherLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerAndOtherPortfolioSegmentMember	6,555us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_OtherLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerAndOtherPortfolioSegmentMember
Pass
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	1,472,232us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	1,475,781us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Covered under loss share agreements	51,262us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	55,925us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Total loans	1,523,494fcbc_LoansAndLeasesReceivableNetOfDeferredIncomeCoveredAndNotCovered / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	1,531,706fcbc_LoansAndLeasesReceivableNetOfDeferredIncomeCoveredAndNotCovered / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Pass | Commercial Loans | Construction Development And Other Land
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	37,686us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_ConstructionDevelopmentAndOtherLandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	38,858us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_ConstructionDevelopmentAndOtherLandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Covered under loss share agreements	5,756us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_ConstructionDevelopmentAndOtherLandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	7,598us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_ConstructionDevelopmentAndOtherLandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Pass | Commercial Loans | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	76,535us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_CommercialAndIndustrialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	81,196us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_CommercialAndIndustrialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Covered under loss share agreements	2,272us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_CommercialAndIndustrialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	2,528us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_CommercialAndIndustrialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Pass | Commercial Loans | Multi-family Residential
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	89,366us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_MultiFamilyResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	89,503us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_MultiFamilyResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Covered under loss share agreements	490us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_MultiFamilyResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	1,400us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_MultiFamilyResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Pass | Commercial Loans | Single-family Non-owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	128,425us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyNonOwnerOccupiedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	126,155us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyNonOwnerOccupiedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Covered under loss share agreements	2,390us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyNonOwnerOccupiedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	2,703us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyNonOwnerOccupiedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Pass | Commercial Loans | Non-farm, Non-residential
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	433,629us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_NonFarmNonResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	441,385us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_NonFarmNonResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Covered under loss share agreements	12,476us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_NonFarmNonResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	12,672us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_NonFarmNonResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Pass | Commercial Loans | Agricultural
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	1,666us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_AgriculturalMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	1,589us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_AgriculturalMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Covered under loss share agreements	42us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_AgriculturalMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	43us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_AgriculturalMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Pass | Commercial Loans | Farmland Loan
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	26,652us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_FarmlandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	26,876us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_FarmlandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Covered under loss share agreements	405us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_FarmlandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	420us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_FarmlandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Pass | Consumer Real Estate | Home Equity Lines
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	105,913us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	107,688us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Covered under loss share agreements	20,385us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	21,295us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Pass | Consumer Real Estate | Single Family Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	461,699us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyOwnerOccupiedLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	454,833us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyOwnerOccupiedLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Covered under loss share agreements	6,769us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyOwnerOccupiedLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	7,094us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyOwnerOccupiedLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Pass | Consumer Real Estate | Owner Occupied Construction
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	35,077us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_OwnerOccupiedConstructionMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	32,551us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_OwnerOccupiedConstructionMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Covered under loss share agreements	190us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_OwnerOccupiedConstructionMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	84us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_OwnerOccupiedConstructionMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Pass | Consumer and Other | Consumer Loan
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	68,348us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerAndOtherPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	68,592us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerAndOtherPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Covered under loss share agreements	87us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerAndOtherPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	88us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerAndOtherPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Pass | Consumer and Other | Other
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	7,236us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_OtherLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerAndOtherPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember	6,555us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_OtherLoansMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerAndOtherPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_PassMember
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	34,613us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember	37,810us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Covered under loss share agreements	46,546us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember	50,309us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Total loans	81,159fcbc_LoansAndLeasesReceivableNetOfDeferredIncomeCoveredAndNotCovered / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember	88,119fcbc_LoansAndLeasesReceivableNetOfDeferredIncomeCoveredAndNotCovered / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Special Mention | Commercial Loans | Construction Development And Other Land
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	381us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_ConstructionDevelopmentAndOtherLandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember	1,384us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_ConstructionDevelopmentAndOtherLandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Covered under loss share agreements	2,920us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_ConstructionDevelopmentAndOtherLandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember	3,227us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_ConstructionDevelopmentAndOtherLandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Special Mention | Commercial Loans | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	592us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_CommercialAndIndustrialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember	616us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_CommercialAndIndustrialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Covered under loss share agreements	82us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_CommercialAndIndustrialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember	82us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_CommercialAndIndustrialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Special Mention | Commercial Loans | Multi-family Residential
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	6,977us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_MultiFamilyResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember	7,007us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_MultiFamilyResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Special Mention | Commercial Loans | Single-family Non-owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	3,853us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyNonOwnerOccupiedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember	3,333us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyNonOwnerOccupiedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Covered under loss share agreements	1,290us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyNonOwnerOccupiedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember	2,059us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyNonOwnerOccupiedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Special Mention | Commercial Loans | Non-farm, Non-residential
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	11,988us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_NonFarmNonResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember	13,028us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_NonFarmNonResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Covered under loss share agreements	4,153us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_NonFarmNonResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember	4,341us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_NonFarmNonResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Special Mention | Commercial Loans | Farmland Loan
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	1,361us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_FarmlandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember	1,432us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_FarmlandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Special Mention | Consumer Real Estate | Home Equity Lines
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	1,531us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember	1,606us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Covered under loss share agreements	36,143us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember	38,296us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Special Mention | Consumer Real Estate | Single Family Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	7,463us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyOwnerOccupiedLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember	8,884us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyOwnerOccupiedLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Covered under loss share agreements	1,739us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyOwnerOccupiedLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember	2,040us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyOwnerOccupiedLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Special Mention | Consumer Real Estate | Owner Occupied Construction
Financing Receivable, Recorded Investment [Line Items]
Covered under loss share agreements	219us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_OwnerOccupiedConstructionMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember	264us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_OwnerOccupiedConstructionMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Special Mention | Consumer and Other | Consumer Loan
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	467us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerAndOtherPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember	520us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerAndOtherPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SpecialMentionMember
Substandard
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	51,465us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	53,585us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Covered under loss share agreements	14,916us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	16,006us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Total loans	66,381fcbc_LoansAndLeasesReceivableNetOfDeferredIncomeCoveredAndNotCovered / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	69,591fcbc_LoansAndLeasesReceivableNetOfDeferredIncomeCoveredAndNotCovered / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Substandard | Commercial Loans | Construction Development And Other Land
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	1,561us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_ConstructionDevelopmentAndOtherLandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	1,029us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_ConstructionDevelopmentAndOtherLandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Covered under loss share agreements	1,734us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_ConstructionDevelopmentAndOtherLandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	2,275us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_ConstructionDevelopmentAndOtherLandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Substandard | Commercial Loans | Commercial and Industrial
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	1,355us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_CommercialAndIndustrialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	1,287us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_CommercialAndIndustrialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Covered under loss share agreements	17us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_CommercialAndIndustrialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	52us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_CommercialAndIndustrialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Substandard | Commercial Loans | Multi-family Residential
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	952us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_MultiFamilyResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	970us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_MultiFamilyResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Covered under loss share agreements	188us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_MultiFamilyResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	184us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_MultiFamilyResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Substandard | Commercial Loans | Single-family Non-owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	5,158us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyNonOwnerOccupiedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	5,683us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyNonOwnerOccupiedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Covered under loss share agreements	1,166us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyNonOwnerOccupiedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	1,156us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyNonOwnerOccupiedMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Substandard | Commercial Loans | Non-farm, Non-residential
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	17,418us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_NonFarmNonResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	19,493us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_NonFarmNonResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Covered under loss share agreements	8,043us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_NonFarmNonResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	8,304us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_NonFarmNonResidentialMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Substandard | Commercial Loans | Agricultural
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	5us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_AgriculturalMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	10us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_AgriculturalMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Substandard | Commercial Loans | Farmland Loan
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	631us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_FarmlandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	1,209us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_FarmlandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Covered under loss share agreements	292us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_FarmlandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	296us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_FarmlandMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = us-gaap_CommercialPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Substandard | Consumer Real Estate | Home Equity Lines
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	1,714us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	1,663us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Covered under loss share agreements	887us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	800us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = us-gaap_HomeEquityMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Substandard | Consumer Real Estate | Single Family Owner Occupied
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	22,155us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyOwnerOccupiedLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	21,758us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyOwnerOccupiedLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Covered under loss share agreements	2,486us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyOwnerOccupiedLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	2,834us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_SingleFamilyOwnerOccupiedLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Substandard | Consumer Real Estate | Owner Occupied Construction
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	247us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_OwnerOccupiedConstructionMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	248us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = fcbc_OwnerOccupiedConstructionMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Covered under loss share agreements	103us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_OwnerOccupiedConstructionMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	105us-gaap_LoansAndLeasesReceivableGrossCarryingAmountCovered / us-gaap_FinancialInstrumentAxis = fcbc_OwnerOccupiedConstructionMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerRealEstateMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember
Substandard | Consumer and Other | Consumer Loan
Financing Receivable, Recorded Investment [Line Items]
Not covered under loss share agreements	$ 269us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerAndOtherPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember	$ 235us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome / us-gaap_FinancialInstrumentAxis = us-gaap_ConsumerLoanMember / us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis = fcbc_ConsumerAndOtherPortfolioSegmentMember / us-gaap_InternalCreditAssessmentAxis = us-gaap_SubstandardMember

X

- Definition

Loans And Leases Receivable, Net Of Deferred Income, Covered And Not Covered

+ References

No definition available.

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- Definition

Aggregate gross carrying amount of loans and leases receivable covered by loss sharing agreements.

+ References

No definition available.

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- Definition

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5074-111524



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4428-111522

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