XML 27 R15.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Other Borrowings | 6 Months Ended
--- | ---
Jun. 30, 2017
Debt Disclosure [Abstract] |
Other Borrowings | Other Borrowings The Bank had unused lines of credit totaling $123.1 million and $125.6 million available with non-affiliated banks at June 30, 2017 and December 31, 2016, respectively. These amounts primarily consist of a blanket floating lien agreement with the Federal Home Loan Bank of Atlanta (FHLB) in which the Bank can borrow up to 19% of its total assets. The unused line of credit with FHLB totaled $72.8 million at June 30, 2017. The Bank had collateral pledged on the borrowing line at June 30, 2017 and December 31, 2016 including real estate loans totaling $99.1 million and $103.9 million, respectively, and Federal Home Loan Bank stock with a book value of $645 thousand and $623 thousand, respectively. The Bank did not have borrowings from the FHLB at June 30, 2017 and December 31, 2016.

X
- Definition Other borrowings. + References No definition available. + Details
Name: | fxnc_OtherBorrowingsTextBlock
Namespace Prefix: | fxnc_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DebtDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration