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Note 15 - Concentrations of Credit Risk | 12 Months Ended
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Dec. 31, 2013
Risks and Uncertainties [Abstract] |
Concentration Risk Disclosure [Text Block] | Note 15: Concentrations of Credit Risk The Company does a general banking business, serving the commercial and personal banking needs of its customers. NBB’s market area in southwest Virginia is made up of the counties of Montgomery, Giles, Pulaski, Tazewell, Wythe, Smyth and Washington. It also includes the independent cities of Radford and Galax, and the portions of Carroll and Grayson Counties that are adjacent to Galax. In addition, it serves those portions of Mercer County and McDowell County, West Virginia that are contiguous with Tazewell County. Substantially all of NBB’s loans are made in its market area. The ultimate collectability of the bank’s loan portfolio and the ability to realize the value of any underlying collateral, if needed, is influenced by the economic conditions of the market area. The Company’s operating results are therefore closely correlated with the economic trends within this area. Commercial real estate as of December 31, 2013 and 2012 represented approximately 52% of the loan portfolio, at $311,266 and $304,308, respectively. Included in commercial real estate are loans for college housing and professional office buildings that comprised $190,866 and $171,186 as of December 31, 2013 and 2012 respectively, corresponding to approximately 32% of the loan portfolio at December 31, 2013 and 29% of the loan portfolio at December 31, 2012. Loans secured by residential real estate were approximately $145,499, or 24% of the portfolio, and $143,262, or 24% of the portfolio at December 31, 2013 and 2012, respectively. Loans secured by automobiles represented 2% of the portfolio for both dates, at $11,580 and $11,764 at December 31, 2013 and 2012, respectively. The Company has established operating policies relating to the credit process and collateral in loan originations. Loans to purchase real and personal property are generally collateralized by the related property and with loan amounts established based on certain percentage limitations of the property’s total stated or appraised value. Credit approval is primarily a function of collateral and the evaluation of the creditworthiness of the individual borrower or project based on available financial information. Management considers the concentration of credit risk to be minimal.

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- Definition The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6327-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6442-108592 + Details
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