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v2.4.1.9

Company's and Bank's Capital Ratios (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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First Community Bancshares, Inc. |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Total Capital to Risk-Weighted Assets, actual amount | $ 284,999 us-gaap_Capital / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | $ 270,636 us-gaap_Capital / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Tier 1 Capital to Risk-Weighted Assets, actual amount | 264,838 us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 250,012 us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Tier 1 Capital to Average Assets (Leverage), actual amount | 264,838 us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 250,012 us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Total Capital to Risk-Weighted Assets, actual (ratio) | 17.68%us-gaap_TangibleCapitalToTangibleAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 16.44%us-gaap_TangibleCapitalToTangibleAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Tier 1 Capital to Risk-Weighted Assets, actual (ratio) | 16.43%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 15.19%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Tier 1 Capital to Average Assets (Leverage), actual (ratio) | 10.12%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 9.95%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Total Capital to Risk-Weighted Assets, for capital adequacy purposes amount | 128,962 us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 131,694 us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Tier 1 Capital to Risk-Weighted Assets, for capital adequacy purposes amount | 64,481 us-gaap_TangibleCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 65,847 us-gaap_TangibleCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Tier 1 Capital to Average Assets (Leverage), for capital adequacy purposes amount | 104,679 us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 100,489 us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Total Capital to Risk-Weighted Assets, for capital adequacy purposes (ratio) | 8.00%us-gaap_TangibleCapitalRequiredForCapitalAdequacyToTangibleAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 8.00%us-gaap_TangibleCapitalRequiredForCapitalAdequacyToTangibleAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Tier 1 Capital to Risk-Weighted Assets, for capital adequacy purposes (ratio) | 4.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 4.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Tier 1 Capital to Average Assets (Leverage), for capital adequacy purposes (ratio) | 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
First Community Bank |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |
Total Capital to Risk-Weighted Assets, actual amount | 251,256 us-gaap_Capital / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember | 236,699 us-gaap_Capital / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember
Tier 1 Capital to Risk-Weighted Assets, actual amount | 231,286 us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember | 216,314 us-gaap_TierOneRiskBasedCapital / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember
Tier 1 Capital to Average Assets (Leverage), actual amount | 231,286 us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember | 216,314 us-gaap_TierOneLeverageCapital / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember
Total Capital to Risk-Weighted Assets, actual (ratio) | 15.73%us-gaap_TangibleCapitalToTangibleAssets / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember | 14.55%us-gaap_TangibleCapitalToTangibleAssets / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember
Tier 1 Capital to Risk-Weighted Assets, actual (ratio) | 14.48%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember | 13.30%us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember
Tier 1 Capital to Average Assets (Leverage), actual (ratio) | 8.87%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember | 8.63%us-gaap_TierOneLeverageCapitalToAverageAssets / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember
Total Capital to Risk-Weighted Assets, for capital adequacy purposes amount | 127,761 us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember | 130,141 us-gaap_CapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember
Tier 1 Capital to Risk-Weighted Assets, for capital adequacy purposes amount | 63,881 us-gaap_TangibleCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember | 65,070 us-gaap_TangibleCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember
Tier 1 Capital to Average Assets (Leverage), for capital adequacy purposes amount | 104,330 us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember | 100,219 us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember
Total Capital to Risk-Weighted Assets, for capital adequacy purposes (ratio) | 8.00%us-gaap_TangibleCapitalRequiredForCapitalAdequacyToTangibleAssets / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember | 8.00%us-gaap_TangibleCapitalRequiredForCapitalAdequacyToTangibleAssets / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember
Tier 1 Capital to Risk-Weighted Assets, for capital adequacy purposes (ratio) | 4.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember | 4.00%us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember
Tier 1 Capital to Average Assets (Leverage), for capital adequacy purposes (ratio) | 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember | 4.00%us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember
Total Capital to Risk-Weighted Assets, to be well capitalized under prompt corrective action provision amount | 159,701 us-gaap_CapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember | 162,676 us-gaap_CapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember
Tier 1 Capital to Risk-Weighted Assets, to be well capitalized under prompt corrective action provision amount | 95,821 us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember | 97,606 us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember
Tier 1 Capital to Average Assets (Leverage), to be well capitalized under prompt corrective action provision amount | $ 130,412 us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember | $ 125,274 us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember
Total Capital to Risk-Weighted Assets, to be well capitalized under prompt corrective action provision (ratio) | 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember | 10.00%us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember
Tier 1 Capital to Risk-Weighted Assets, to be well capitalized under prompt corrective action provision (ratio) | 6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember | 6.00%us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember
Tier 1 Capital to Average Assets (Leverage), to be well capitalized under prompt corrective action provision (ratio) | 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember | 5.00%us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets / dei_LegalEntityAxis = fcbc_FirstCommunityBankMember

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- Definition The amount of Total Capital required to be categorized as well as capitalized under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition The minimum amount of tangible capital required under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition The minimum amount of Tangible Capital divided by tangible assets (Tangible Capital Ratio) as defined in the regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958570-112826 + Details
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- Definition Tangible Capital divided by Tangible assets as defined in the regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition The minimum amount of Tier 1 Leverage Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition Tier 1 Risk Based Capital as defined in the regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition The Tier 1 capital ratio (Tier 1 capital divided by risk weighted assets) required to be categorized as "well capitalized" under the regulatory framework for prompt corrective action. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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- Definition Tier 1 capital divided by risk weighted assets as defined by regulations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826 + Details
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