XML 27 R47.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Trust Preferred Capital Notes (Details) (USD $) In Millions, unless otherwise specified | 6 Months Ended
--- | ---
Jun. 30, 2012
First National (VA) Statutory Trust II [Member] |
Trust Preferred Capital Notes (Textual) [Abstract] |
Formation of wholly owned subsidiary | Jun. 08, 2004
Issuance of trust preferred securities | $ 5.0
LIBOR-indexed floating rate of interest | 3.07%
Junior subordinated debt securities | 5.2
Securities mandatory redemption date | Jun. 17, 2034
First National (VA) Statutory Trust III [Member] |
Trust Preferred Capital Notes (Textual) [Abstract] |
Formation of wholly owned subsidiary | Jul. 24, 2006
Issuance of trust preferred securities | 4.0
LIBOR-indexed floating rate of interest | 2.07%
Junior subordinated debt securities | $ 4.1
Securities mandatory redemption date | Oct. 01, 2036
Maximum capital required for capital adequacy | 25.00%

X
- Definition Junior subordinated debenture owed to unconsolidated subsidiary trust issued through pooled underwriting. + References No definition available. + Details
Name: | fxnc_JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrustIssuedThroughPooledUnderwriting
Namespace Prefix: | fxnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Maximum capital required for capital adequacy. + References No definition available. + Details
Name: | fxnc_MaximumCapitalRequiredForCapitalAdequacy
Namespace Prefix: | fxnc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Redemption date of securities. + References No definition available. + Details
Name: | fxnc_RedemptionDateOfSecurities
Namespace Prefix: | fxnc_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | fxnc_TrustPreferredCapitalNotesTextualAbstract
Namespace Prefix: | fxnc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Interest rate stated in the contractual debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Including the current and noncurrent portions, the carrying value of junior subordinated long-term debt owed to unconsolidated subsidiary trusts as of the balance sheet date. Such debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets and was initially scheduled to be repaid after one year or beyond the normal operating cycle if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
Name: | us-gaap_JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrust
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Date the subsidiary of the limited liability company (LLC) or limited partnership (LP) was formed, in CCYY-MM-DD format. + References No definition available. + Details
Name: | us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration