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Credit Quality - Additional information (Detail) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2015 USD ($) Loan | Dec. 31, 2014 USD ($) Loan
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Minimum commercial loan relationships to be reviewed by loan review function | $ 4,000,000 |
Restructured loans to borrowers experiencing financial difficulty in excess of | $ 250,000 |
Performing status returned period | 6 months |
Allowance for loan losses | $ 478,000 | $ 475,000
Non Covered Loans |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Accruing loans contractually past due 90 days or more | 0 | 0
Covered Loans |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Accruing loans contractually past due 90 days or more | $ 0 | $ 0
Waccamaw Bank |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Percentage of loan and foreclosed real estate losses covered by FDIC | 80.00% |
PCI loans |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Number of impaired loans | Loan | 2 | 2
Number of loans | Loan | 6 | 7

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- Definition Allowance for loan losses. + References No definition available. + Details
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Balance Type: | credit
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- Definition Total commercial loans. + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Financing Receivable Number Of Loans + References No definition available. + Details
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Balance Type: | na
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- Definition Loans And Leases Receivable Impaired Number Of Loans + References No definition available. + Details
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Data Type: | xbrli:integerItemType
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- Definition Percentage of loss covered by FDIC. + References No definition available. + Details
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- Definition Performing status returned period. + References No definition available. + Details
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- Definition Restructured loans reserves. + References No definition available. + Details
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Namespace Prefix: | fcbc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Data Type: | xbrli:stringItemType
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Period Type: | duration

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- Definition Recorded investment in financing receivables that are 90 days or more past due and still accruing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5111-111524 + Details
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- Details
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- Details
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- Details
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- Details
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