XML 55 R43.htm IDEA: XBRL DOCUMENT v3.8.0.1

Loans - Analysis of the Credit Risk Profile of Each Loan Class (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 520,936	$ 522,201	$ 497,770
Pass
Financing Receivable, Recorded Investment [Line Items]
Total Loans	505,886	507,176
Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total Loans	5,365	5,225
Substandard
Financing Receivable, Recorded Investment [Line Items]
Total Loans	9,685	9,800
Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Real estate loans | Construction and land development
Financing Receivable, Recorded Investment [Line Items]
Total Loans	33,941	35,927	36,024
Real estate loans | Secured by 1-4 family residential
Financing Receivable, Recorded Investment [Line Items]
Total Loans	208,338	208,177	205,623
Real estate loans | Other real estate loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans	222,352	222,256	216,591
Real estate loans | Pass | Construction and land development
Financing Receivable, Recorded Investment [Line Items]
Total Loans	29,743	31,553
Real estate loans | Pass | Secured by 1-4 family residential
Financing Receivable, Recorded Investment [Line Items]
Total Loans	204,456	204,166
Real estate loans | Pass | Other real estate loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans	215,723	215,773
Real estate loans | Special Mention | Construction and land development
Financing Receivable, Recorded Investment [Line Items]
Total Loans	2,448	2,268
Real estate loans | Special Mention | Secured by 1-4 family residential
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,908	1,933
Real estate loans | Special Mention | Other real estate loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans	962	971
Real estate loans | Substandard | Construction and land development
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,750	2,106
Real estate loans | Substandard | Secured by 1-4 family residential
Financing Receivable, Recorded Investment [Line Items]
Total Loans	1,974	2,078
Real estate loans | Substandard | Other real estate loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans	5,667	5,512
Real estate loans | Doubtful | Construction and land development
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Real estate loans | Doubtful | Secured by 1-4 family residential
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Real estate loans | Doubtful | Other real estate loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Commercial and industrial loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans	39,253	38,763	29,192
Commercial and industrial loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Total Loans	38,912	38,606
Commercial and industrial loans | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total Loans	47	53
Commercial and industrial loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total Loans	294	104
Commercial and industrial loans | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Consumer and other loans
Financing Receivable, Recorded Investment [Line Items]
Total Loans	17,052	17,078	$ 10,340
Consumer and other loans | Pass
Financing Receivable, Recorded Investment [Line Items]
Total Loans	17,052	17,078
Consumer and other loans | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Consumer and other loans | Substandard
Financing Receivable, Recorded Investment [Line Items]
Total Loans	0	0
Consumer and other loans | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Total Loans	$ 0	$ 0

X

- 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

Name:	us-gaap_FinancingReceivableRecordedInvestmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. 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 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522

+ Details

Name:	us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_PassMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_SpecialMentionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_SubstandardMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InternalCreditAssessmentAxis=us-gaap_DoubtfulMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=fxnc_RealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fxnc_ConstructionAndLandDevelopmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fxnc_ResidentialOneThroughFourFamilyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=fxnc_OtherRealEstateLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=fxnc_CommercialAndIndustrialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: