National Bankshares (NKSH) 10-K 14 Mar 18 2017 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2017	Mar. 12, 2018	Jun. 30, 2017
Document Information [Line Items]
Entity Registrant Name	NATIONAL BANKSHARES INC
Entity Central Index Key	796,534
Trading Symbol	nksh
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Common Stock, Shares Outstanding (in shares)		6,957,974
Entity Public Float			$ 283,885,339
Document Type	10-K
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	FY
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Assets
Cash and due from banks	$ 12,926	$ 13,974
Interest-bearing deposits	51,233	80,268
Securities available for sale, at fair value	331,387	304,282
Securities held to maturity (fair value of $130,113 at December 31, 2017 and $137,692 at December 31, 2016)	127,164	134,957
Restricted stock	1,200	1,170
Mortgage loans held for sale	260	478
Loans:
Real estate construction loans	34,694	36,345
Consumer real estate loans	166,965	157,718
Commercial real estate loans	340,414	336,457
Commercial non real estate loans	40,518	39,024
Public sector and IDA loans	51,443	45,474
Consumer non real estate loans	34,648	33,528
Total loans	668,682	648,546
Less unearned income and deferred fees and costs	(613)	(794)
Loans, net of unearned income and deferred fees and costs	668,069	647,752
Less allowance for loan losses	(7,925)	(8,300)
Loans, net	660,144	639,452
Premises and equipment, net	8,221	8,853
Accrued interest receivable	5,297	5,260
Other real estate owned, net	2,817	3,156
Intangible assets and goodwill	5,898	5,966
Bank-owned life insurance (BOLI)	33,756	22,998
Other assets	16,454	13,128
Total assets	1,256,757	1,233,942
Liabilities and Stockholders’ Equity
Noninterest-bearing demand deposits	182,511	171,946
Interest-bearing demand deposits	622,189	604,093
Savings deposits	140,150	136,789
Time deposits	114,884	130,614
Total deposits	1,059,734	1,043,442
Accrued interest payable	62	55
Other liabilities	12,065	12,182
Total liabilities	1,071,861	1,055,679
Commitments and contingencies
Stockholders’ equity:
Preferred stock, no par value, 5,000,000 shares authorized; none issued and outstanding
Common stock of $1.25 par value. Authorized 10,000,000 shares; issued and outstanding, 6,957,974 shares in 2017 and 2016	8,698	8,698
Retained earnings	185,893	178,224
Accumulated other comprehensive loss, net	(9,695)	(8,659)
Total stockholders’ equity	184,896	178,263
Total liabilities and stockholders’ equity	$ 1,256,757	$ 1,233,942

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Securities held to maturity, fair value	$ 130,113	$ 137,692
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 1.25	$ 1.25
Common stock, shares authorized (in shares)	10,000,000	10,000,000
Common stock, shares issued (in shares)	6,957,974	6,957,974
Common stock, shares outstanding (in shares)	6,957,974	6,957,974

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Interest Income
Interest and fees on loans	$ 29,932	$ 29,365	$ 30,446
Interest on interest-bearing deposits	791	532	254
Interest and dividends on securities – taxable	5,711	5,910	6,776
Interest on securities – nontaxable	4,826	5,123	5,438
Total interest income	41,260	40,930	42,914
Interest Expense
Interest on deposits	4,125	4,166	4,183
Total interest expense	4,125	4,166	4,183
Net interest income	37,135	36,764	38,731
Provision for loan losses	157	1,650	2,009
Net interest income after provision for loan losses	36,978	35,114	36,722
Noninterest Income
Service charges on deposit accounts	2,776	2,458	2,250
Other service charges and fees	205	212	215
Credit card fees	3,948	3,798	3,861
Trust income	1,530	1,346	1,229
BOLI income	758	597	603
Other income	1,148	1,289	1,295
Realized securities gains, net	14	232	33
Total noninterest income	10,379	9,932	9,486
Noninterest Expense
Salaries and employee benefits	13,746	12,792	12,522
Occupancy, furniture and fixtures	1,820	1,849	1,743
Data processing and ATM	2,275	2,186	1,657
FDIC assessment	364	476	546
Credit card processing	2,748	2,782	2,692
Intangible assets amortization	68	257	999
Net costs of other real estate owned	205	472	608
Franchise taxes	1,315	1,296	1,288
Other operating expenses	4,431	4,042	3,580
Total noninterest expense	26,972	26,152	25,635
Income before income taxes	20,385	18,894	20,573
Income tax expense	6,293	3,952	4,740
Net income	$ 14,092	$ 14,942	$ 15,833
Basic net income per common share (in dollars per share)	$ 2.03	$ 2.15	$ 2.28
Fully diluted net income per common share (in dollars per share)	$ 2.03	$ 2.15	$ 2.28

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net income	$ 14,092	$ 14,942	$ 15,833
Other Comprehensive Income (Loss), Net of Tax
Unrealized holding gain (loss) on available for sale securities net of tax of $296 in 2017, ($431) in 2016 and ($571) in 2015	546	(800)	(1,064)
Reclassification adjustment for gain included in net income, net of tax of ($4) in 2017, ($65) in 2016 and ($12) in 2015	(6)	(121)	(21)
Net pension gain (loss) arising during the period, net of tax of $115 in 2017, $132 in 2016 and ($597) in 2015	213	271	(1,108)
Less amortization of prior service cost included in net periodic pension cost, net of tax of ($38) in 2017, ($38) in 2016 and ($38) in 2015	(71)	(72)	(72)
Other comprehensive income (loss), net of tax of $369 in 2017, ($402) in 2016 and ($1,218) in 2015	682	(722)	(2,265)
Total Comprehensive Income	$ 14,774	$ 14,220	$ 13,568

Consolidated Statements of Com6

Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Unrealized holding gain (loss) on available for sale securities, tax	$ 296	$ (431)	$ (571)
Reclassification adjustment for gain included in net income, tax	(4)	(65)	(12)
Net pension gain (losses) arising during the period, tax	115	132	(597)
Amortization of prior service cost included in net periodic pension cost, tax	(38)	(38)	(38)
Other comprehensive income (loss), tax	$ 369	$ (402)	$ (1,218)

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance at Dec. 31, 2014	$ 8,688	$ 163,287	$ (5,672)	$ 166,303
Net income		15,833		15,833
Other comprehensive income (loss), net of tax			(2,265)	(2,265)
Cash dividend		(7,930)		(7,930)
Exercise of stock options	10	163		173
Balance at Dec. 31, 2015	8,698	171,353	(7,937)	172,114
Net income		14,942		14,942
Other comprehensive income (loss), net of tax			(722)	(722)
Cash dividend		(8,071)		(8,071)
Balance at Dec. 31, 2016	8,698	178,224	(8,659)	178,263
Net income		14,092		14,092
Other comprehensive income (loss), net of tax			682	682
Cash dividend		(8,141)		(8,141)
Reclassification of stranded tax effects from change in tax rate		1,718	(1,718)
Balance at Dec. 31, 2017	$ 8,698	$ 185,893	$ (9,695)	$ 184,896

Consolidated Statements of Cha8

Consolidated Statements of Changes in Stockholders' Equity (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
AOCI Attributable to Parent [Member]
Other comprehensive income (loss), tax	$ 369	$ 402	$ 1,218
Retained Earnings [Member]
Cash dividend, per share (in dollars per share)	$ 1.17	$ 1.16	$ 1.14
Other comprehensive income (loss), tax	$ 369	$ (402)	$ (1,218)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash Flows from Operating Activities
Net income	$ 14,092,000	$ 14,942,000	$ 15,833,000
Adjustment to reconcile net income to net cash provided by operating activities:
Provision for loan losses	157,000	1,650,000	2,009,000
Deferred income tax expense	1,790,000	18,000	10,000
Re-valuation of deferred tax assets	1,560,000
Depreciation of premises and equipment	805,000	801,000	749,000
Amortization of intangibles	68,000	257,000	999,000
Amortization of premiums and accretion of discounts, net	58,000	89,000	117,000
Gain on disposal of fixed assets	(134,000)		15,000
Gain on calls and sales of securities available for sale, net	(10,000)	(186,000)	(33,000)
Gain on calls of securities held to maturity, net	(4,000)	(46,000)
Loss and writedown on other real estate owned	125,000	355,000	426,000
Income on investment in BOLI	(758,000)	(597,000)	(603,000)
Gain on sale of mortgage loans held for sale	(211,000)	(280,000)	(273,000)
Origination of mortgage loans held for sale	(13,912,000)	(17,090,000)	(17,641,000)
Sale of mortgage loans held for sale	14,341,000	17,526,000	17,571,000
Contribution to defined benefit plan	(4,507,000)	(811,000)	(139,000)
Net change in:
Accrued interest receivable	(37,000)	509,000	(21,000)
Other assets	(2,537,000)	438,000	559,000
Accrued interest payable	7,000	(1,000)	(12,000)
Other liabilities	101,000	(41,000)	963,000
Net cash provided by operating activities	10,994,000	17,533,000	20,529,000
Cash Flows from Investing Activities
Net change in interest-bearing deposits	29,035,000	50,543,000	(28,263,000)
Proceeds from repayments of mortgage-backed securities	298,000	415,000	717,000
Proceeds from calls, sales and maturities of securities available for sale	13,812,000	220,581,000	64,556,000
Proceeds from calls and maturities of securities held to maturity	8,975,000	16,945,000	9,205,000
Purchases of securities available for sale	(40,290,000)	(290,296,000)	(80,093,000)
Purchases of securities held to maturity	(1,319,000)
Net change in restricted stock	(30,000)	(41,000)	(40,000)
Purchase of BOLI	(10,000,000)
Purchases of loan participations	(7,395,000)	(3,800,000)	(1,001,000)
Collections of loan participations	2,113,000	820,000	1,978,000
Loan originations and principal collections, net	(15,951,000)	(27,792,000)	(17,259,000)
Proceeds from disposal of other real estate owned	311,000	877,000	773,000
Recoveries on loans charged off	287,000	159,000	145,000
Additions to premises and equipment	(261,000)	(634,000)	(663,000)
Proceeds from sale of premises and equipment	222,000
Net cash used in investing activities	(20,193,000)	(32,223,000)	(49,945,000)
Cash Flows from Financing Activities
Net change in time deposits	(15,730,000)	(21,147,000)	(22,723,000)
Net change in other deposits	32,022,000	45,730,000	59,154,000
Cash dividends paid	(8,141,000)	(8,071,000)	(7,930,000)
Stock options exercised			173,000
Net cash provided by financing activities	8,151,000	16,512,000	28,674,000
Net change in cash and due from banks	(1,048,000)	1,822,000	(742,000)
Cash and due from banks at beginning of year	13,974,000	12,152,000	12,894,000
Cash and due from banks at end of year	12,926,000	13,974,000	12,152,000
Supplemental Disclosures of Cash Flow Information
Interest paid on deposits and borrowed funds	4,118,000	4,167,000	4,195,000
Income taxes paid	4,092,000	3,940,000	4,790,000
Supplemental Disclosures of Noncash Activities
Loans charged against the allowance for loan losses	819,000	1,806,000	2,120,000
Loans transferred to other real estate owned	97,000	222,000	620,000
Unrealized gain (loss) on securities available for sale	832,000	(1,417,000)	(1,668,000)
Minimum pension liability adjustment	$ 219,000	$ 293,000	$ (1,815,000)

Note 1 - Summary of Significant

Note 1 - Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Significant Accounting Policies [Text Block]	Note 1: The consolidated financial statements include the accounts of National Bankshares, Inc. (Bankshares) and its wholly-owned subsidiaries, the National Bank of Blacksburg (NBB), and National Bankshares Financial Services, Inc. (NBFS), (the Company). All intercompany balances and transactions have been eliminated in consolidation. The accounting and reporting policies of the Company conform to accounting principles generally accepted in the United States of America and to general practices within the banking industry. The following is a summary of the more significant accounting policies. Subsequent events have been considered through the date when the Form 10 Cash and Cash Equivalents For purposes of the consolidated statements of cash flows, cash and cash equivalents include cash and amounts due from banks. Interest-Bearing Deposits The Company invests over-night funds in interest-bearing deposits at other banks, including the Federal Home Loan Bank, the Federal Reserve, and other entities. Interest-bearing deposits are carried at cost. Securities Certain debt securities that management has the positive intent and ability to hold to maturity are classified as “held to maturity” and recorded at amortized cost. Trading securities are recorded at fair value with changes in fair value included in earnings. Securities not The Company follows the accounting guidance related to recognition and presentation of other-than-temporary impairment. The guidance specifies that if (a) an entity does not not not not For equity securities, when the Company decides to sell an impaired available-for-sale security and the Company does not not Loans Held for Sale Loans originated and intended for sale in the secondary market are carried at the lower of cost or estimated fair value on an individual loan basis. Net unrealized losses, if any, are recognized through a valuation allowance by charges to income. Loans held for sale are sold with the mortgage servicing rights released by the Company. Loans The Company, through its banking subsidiary, provides mortgage, commercial, and consumer loans to customers. A substantial portion of the loan portfolio is represented by mortgage loans, particularly commercial mortgages. The ability of the Company’s debtors to honor their contracts is dependent upon the real estate and general economic conditions in the Company’s market area. The Company’s loans are grouped into six Real estate construction loans are subject to general risks from changing commercial building and housing market trends and economic conditions that may not may The credit quality of consumer real estate is subject to risks associated with the borrower’s repayment ability and collateral value, measured generally by analyzing local unemployment and bankruptcy trends, and local housing market trends and interest rates. Risks specific to a borrower are determined by previous repayment history, loan-to-value ratios and debt-to-income ratios. The commercial real estate segment includes loans secured by multifamily residential real estate, commercial real estate occupied by the owner/borrower, and commercial real estate leased to non-owners. Loans in the commercial real estate segment are impacted by economic risks from changing commercial real estate markets, rental markets for multi-family housing and commercial buildings, business bankruptcy rates, local unemployment rates and interest rate trends that would impact the businesses housed by the commercial real estate. Commercial non real estate loans are secured by collateral other than real estate, or are unsecured. Credit risk for commercial non real estate loans is subject to economic conditions, generally monitored by local business bankruptcy trends, interest rates, borrower repayment ability and collateral value (if secured). Public sector and IDA loans are extended to municipalities and related entities. Credit risk is based upon the entity’s ability to repay through either a direct obligation or assignment of specific revenues from an enterprise or other economic activity, and interest rate trends. Consumer non real estate includes credit cards, automobile and other consumer loans. Credit cards and certain other consumer loans are unsecured, while collateral is obtained for automobile loans and other consumer loans. Credit risk stems primarily from the borrower’s ability to repay. If the loan is secured, the company analyzes loan-to-value ratios. All consumer non real estate loans are analyzed for debt-to-income ratios and previous credit history, as well as for general risks for the portfolio, including local unemployment rates, personal bankruptcy rates and interest rates. Risks from delinquency trends and characteristics such as second Loans that management has the intent and ability to hold for the foreseeable future, or until maturity or payoff, generally are reported at their outstanding unpaid principal balances adjusted for the allowance for loan losses, any purchase premium or discount, unearned income and deferred fees or costs. Interest income is accrued on the unpaid principal balance. Unearned income on dealer-originated loans and loan origination fees, net of certain direct origination costs, are deferred and recognized as an adjustment of the related loan yield using the interest method. Purchase premium or discount is recognized as an adjustment of the related loan yield using the interest method. The Company considers multiple factors when determining whether to discontinue accrual of interest on individual loans. Generally loans are placed in nonaccrual status when collection of interest and/or full principal is considered doubtful. Interest accrual is discontinued at the time a commercial real estate loan or commercial non-real estate loan is 90 not 90 six may All interest accrued but not A loan is considered past due when a payment of principal and/or interest is due but not not 30 not not 30 30 89 90 Allowance for Loan Losses The allowance for loan losses represents management’s estimate of probable losses inherent in the Company’s loan portfolio. A provision for estimated losses is charged to earnings to establish and maintain the allowance for loan losses at a level reflective of the estimated credit risk. When management determines that a loan balance or portion of a loan balance is not Management evaluates the allowance each quarter through a methodology that estimates losses on individual impaired loans and evaluates the effect of numerous factors on the credit risk of groups of homogeneous loans. Specific allowances are established for individually-evaluated impaired loans based on the excess of the loan balance relative to the fair value of the loan. Impaired loans are designated as such when current information indicates that it is probable that the Company will be unable to collect principal or interest when due according to the contractual terms of the loan agreement. Loan relationships exceeding $250,000 not Fair value of impaired loans is estimated in one three 1 2 3 General allowances are established for collectively-evaluated loans. Collectively-evaluated loans are grouped into classes based on similar characteristics. Factors considered in determining general allowances include net charge-off trends, internal risk ratings, delinquency and nonperforming rates, product mix, underwriting practices, industry trends and economic trends. The Company’s charge-off policy meets or is more stringent than the minimum standards required by regulators. When available information confirms that a specific loan or a portion thereof, within any loan class, is uncollectible the amount is charged off against the allowance for loan losses. Additionally, losses on consumer real estate and consumer non-real estate loans are typically charged off no 120 180 180 may may Troubled Debt Restructurings (“TDRs”) In situations where, for economic or legal reasons related to a borrower’s financial condition, management grants a concession to the borrower that it would not may Rate Lock Commitments The Company enters into commitments to originate mortgage loans in which the interest rate on the loan is determined prior to funding (rate lock commitments). Rate lock commitments on mortgage loans that are intended to be sold are considered to be derivatives. The period of time between issuance of a loan commitment and closing and sale of the loan generally ranges from 30 60 not The market value of rate lock commitments and best efforts contracts is not not no Premises and Equipment Land is carried at cost. Premises and equipment are stated at cost, net of accumulated depreciation. Depreciation is charged to expense over the estimated useful lives of the assets on the straight-line basis. Depreciable lives include 40 3 10 3 Other Real Estate Owned Real estate acquired through or in lieu of foreclosure is held for sale and is initially recorded at fair value less estimated costs to sell at the date of foreclosure, establishing the cost basis of the asset. Subsequent to foreclosure, valuations are periodically performed by management and the assets are carried at the lower of carrying amount or fair value less estimated costs to sell. Revenue and expenses from operations and changes in the valuation allowance are included in other operating expenses. Intangible Assets and Goodwill The Company records as goodwill the excess of purchase price over the fair value of the identifiable net assets acquired. Goodwill is subject to at least an annual assessment for impairment by applying a fair value based test. The Company performs its annual analysis as of September 30 two first second The Company’s goodwill impairment analysis considered three first second third 100% no second third Each measure indicated that the Company’s fair value exceeded its book value. No December 31, 2017, 2016 2015. Acquired intangible assets (such as core deposit intangibles) are recognized separately from goodwill if the benefit of the asset can be sold, transferred, licensed, rented, or exchanged, and amortized over its useful life. The Company amortizes on a straight-line basis intangible assets arising from branch purchase transactions over their useful lives, determined by the Company to be ten twelve Stock-Based Compensation The Company’s 1999 March 9, 2009. Pension Plan The Company recognizes the overfunded or underfunded status of a defined benefit postretirement plan as an asset or liability in its statement of financial position and recognizes changes in that funded status in the year in which the changes occur through comprehensive income. The funded status of a benefit plan is measured as the difference between plan assets at fair value and the projected benefit obligation. Income Taxes Income tax accounting guidance results in two In February 2018, 2018 02, 2018 01 2017 $1,718. Deferred income tax expense results from changes in deferred tax assets and liabilities between periods. Deferred tax assets are recognized if it is more likely than not, not 50 not 50 not not not not The Company recognizes interest and penalties on income taxes as a component of income tax expense. The results for the year and the three December 31, 2017 December 22, 2017. January 1, 2018 21% 35%. fourth 2017 $1,560 $1,560 one Trust Assets and Income Assets (other than cash deposits) held by the Trust Department in a fiduciary or agency capacity for customers are not not Earnings Per Common Share Basic earnings per common share represents income available to common stockholders divided by the weighted-average number of common shares outstanding during the period. Diluted earnings per common share reflects additional common shares that would have been outstanding if dilutive potential common shares had been issued, as well as any adjustment to income that would result from the assumed issuance. Potential common shares that may The following shows the weighted average number of shares used in computing earnings per common share and the effect on the weighted average number of shares of potentially dilutive common stock. 20 17 20 16 20 15 Average number of common shares outstanding 6,957,974 6,957,974 6,953,849 Effect of dilutive options --- --- 3,245 Average number of common shares outstanding used to calculate diluted earnings per common share 6,957,974 6,957,974 6,957,094 The computation of diluted net income per common share excludes shares for stock options that would be anti-dilutive. There were no 2017, 2016 2015. December 31, 2015, no Loss Contingencies Loss contingencies, including claims and legal actions arising in the ordinary course of business are recorded as liabilities when the likelihood of loss is probable and reasonably estimated. Management does not Advertising The Company charges advertising costs to expenses as incurred. In 2017, $148, $122 $105 2016 2015, Use of Estimates In preparing consolidated financial statements in conformity with accounting principles generally accepted in the United States of America, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the consolidated balance sheet and reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term relate to the determination of the allowance for loan losses, the valuation of foreclosed real estate, other-than-temporary impairments of securities, evaluation of impairment of goodwill, and pension obligations. Changing economic conditions, adverse economic prospects for borrowers, as well as regulatory agency action as a result of examination, could cause NBB to recognize additions to the allowance for loan losses and may Reclassifications Certain reclassifications have been made to prior period balances to conform to the current year provisions. Prior to 2017, 2017, Recent Accounting Pronouncements In May 2014, No. 2014 09, 606.” one January 1, 2018. first January 1, 2018 2014 09 not In January 2016, 2016 01, 825 10 2016 01, 1 2 3 4 December 15, 2017, not 2016 01 In February 2016, No. 2016 02, 842 2016 02, 1 2 606, December 15, 2018, not may not 2016 02 six one three During June 2016, No. 2016 13, 326 December 15, 2019. 2016 13 During August 2016, No. 2016 15, 230 December 15, 2017, not 2016 15 During January 2017, No. 2017 01, 805 805, three not not not not 1 2 December 15, 2017, No not 2017 01 During January 2017, No. 2017 04, 350 2 2 December 15, 2019. January 1, 2017. not 2017 04 During March 2017, 2017 07, 715 715 not December 15, 2017, not 2017 07 During March 2017, 2017 ‐ 08, 310 ‐ 20 December 15, 2018, 2017 ‐ 08 During May 2017, 2017 ‐ 09, 718 718. December 15, 2017. not 2017 ‐ 09 During August 2017, 2017 12, 815 December 15, 2018. 2017 ‐ 12 During February 2018, 2018 02, 220 December 15, 2018, December 31, 2017. 2017 $1,718.

Note 2 - Restriction on Cash

Note 2 - Restriction on Cash	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Cash and Cash Equivalents Disclosure [Text Block]	Note 2 : Restriction on Cash The Company’s subsidiary bank is a member of the Federal Reserve System. The Federal Reserve does not

Note 3 - Securities

Note 3 - Securities	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	Note 3 : Securities The amortized cost and fair value of securities available for sale, with gross unrealized gains and losses, follows: December 31, 2017 Available for sale: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Government agencies and corporations $ 312,604 $ 609 $ 5,494 $ 307,719 States and political subdivisions 16,853 100 119 16,834 Mortgage-backed securities 602 57 --- 659 Corporate debt securities 6,016 188 29 6,175 Total securities available for sale $ 336,075 $ 954 $ 5,642 $ 331,387 December 31, 2016 Available for sale: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses F air Value U.S. Government agencies and corporations $ 291,271 $ 492 $ 6,165 $ 285,598 States and political subdivisions 11,482 211 --- 11,693 Mortgage-backed securities 845 85 --- 930 Corporate debt securities 6,015 20 137 5,898 Other securities 189 --- 26 163 Total securities available for sale $ 309,802 $ 808 $ 6,328 $ 304,282 The amortized cost and fair value of single maturity securities available for sale at December 31, 2017, may may December 31, 2017. December 31, 20 1 7 Available for sale: Amortized Cost Fair Value Due in one year or less $ 33,405 $ 33,238 Due after one year through five years 192,388 189,005 Due after five years through ten years 72,001 70,509 Due after ten years 38,281 38,635 Total securities available for sale $ 336,075 $ 331,387 The amortized cost and fair value of securities held to maturity, with gross unrealized gains and losses, follows: December 31, 20 1 7 Held to maturity: Amortized Cost Gross U nrealized Gains Gross Unrealized Losses Fair Value U.S. Government agencies and corporations $ 3,934 $ 167 $ --- $ 4,101 States and political subdivisions 122,039 2,929 173 124,795 Mortgage-backed securities 209 21 --- 230 Corporate debt securities 982 5 --- 987 Total securities held to maturity $ 127,164 $ 3,122 $ 173 $ 130,113 December 31, 20 1 6 Held to maturity: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Government agencies and corporations $ 3,934 $ 201 $ --- $ 4,135 States and political subdivisions 129,783 3,579 1,082 132,280 Mortgage-backed securities 265 30 --- 295 Corporate debt securities 975 7 --- 982 Total securities held to maturity $ 134,957 $ 3,817 $ 1,082 $ 137,692 The amortized cost and fair value of single maturity securities held to maturity at December 31, 2017, may may December 31, 2017. December 31, 20 1 7 Held to maturity: Amortized Cost Fair Value Due in one year or less $ 11,906 $ 12,088 Due after one year through five years 24,403 25,359 Due after five years through ten years 25,242 25,892 Due after ten years 65,613 66,774 Total securities held to maturity $ 127,164 $ 130,113 Information pertaining to securities with gross unrealized losses at December 31, 2017 2016 December 31, 2017 Less Than 12 Months 12 Months or More Fair Value Unrealized Loss Fair Value Unrealized Loss U. S. Government agencies and corporations $ 68,380 $ 871 $ 225,738 $ 4,623 State and political subdivisions 18,688 194 2,989 98 Corporate debt securities --- --- 948 29 Total temporarily impaired securities $ 87,068 $ 1,065 $ 229,675 $ 4,750 December 31, 2016 Less Than 12 Months 12 Months or More Fair Value Unrealized Loss Fair Value Unrealized Loss U. S. Government agencies and corporations $ 260,150 $ 6,161 $ 996 $ 4 State and political subdivisions 31,257 934 1,316 148 Corporate debt securities 3,888 137 --- --- Other securities --- --- 163 26 Total temporarily impaired securities $ 295,295 $ 7,232 $ 2,475 $ 178 The Company had 343 $316,743 December 31, 2017. $5,815. 236 securities with a fair value of $229,675 $4,750 twelve December 31, 2017 U.S. Government agencies. $4,623 231 $225,738. not not not may not States and political subdivisions. $98 4 $2,989. 12 not not not not may not Corporate debt securities . $29 one $948 not not not not may not Restricted stock. $1,200 December 31, 2017 $1,170 December 31, 2016. not Redemption of FHLB stock is subject to certain limitations and conditions. At its discretion, the FHLB may $494,666 December 31, 2017. December 31, 2017, not Management regularly monitors the credit quality of the investment portfolio. Changes in ratings are noted and follow-up research on the issuer is undertaken when warranted. Management intends to carefully monitor any changes in bond quality. Pledged Securities At December 31, 2017 2016, $194,980 $178,121, Realized Securities Gains and Losses During 2017, $4. $189. 2017, 2016 2015 For the year ended December 31, 2017 Proceeds Book V alue Gross G ain Gross L oss N et Gain Available for sale $ 13,620 $ 13,614 $ 6 $ --- $ 6 Held to maturity 8,975 8,971 4 --- 4 For the year ended December 31, 201 6 Proceeds Book V alue Gross Gain Gross L oss N et Gain Available for sale $ 220,520 $ 220,334 $ 186 $ --- $ 186 Held to maturity 16,160 16,114 46 --- 46 For the year ended December 31, 201 5 Proceeds Book V alue Gross Gain Gross L oss N et Gain Available for sale $ 63,775 $ 63,742 $ 34 $ 1 $ 33 Held to maturity 7,605 7,605 --- --- ---

Note 4 - Related Party Transact

Note 4 - Related Party Transactions	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Related Party Transactions Disclosure [Text Block]	Note 4 : Related Party Transactions In the ordinary course of business, the Company, through its banking subsidiary, has granted loans to related parties, including executive officers and directors of Bankshares and its subsidiaries. Total funded credit extended to related parties amounted to $12,600 December 31, 2017 $9,445 December 31, 2016. December 31, 2016 2017 2017. Loans to related parties as of December 31, 2017 During the year ended December 31, 2017, $7,407 $3,996. $15,612 December 31, 2017 $14,604 December 31, 2016. The lease payments totaled $5 2017 $5 2016.

Note 5 - Allowance for Loan Los

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Allowance for Credit Losses [Text Block]	Note 5 : Allowance for Loan Losses, Nonperforming Assets and Impaired Loans The allowance for loan losses methodology incorporates individual evaluation of impaired loans and collective evaluation of groups of non-impaired loans. The Company performs ongoing analysis of the loan portfolio to determine credit quality and to identify impaired loans. Credit quality is rated based on the loan’s payment history, the borrower’s current financial situation and value of the underlying collateral. Impaired Loans Loans are designated as impaired when, in the judgment of management based on current information and events, it is probable that all amounts due will not not not six may 1: Troubled debt restructurings impact the estimation of the appropriate level of the allowance for loan losses. If the restructuring included forgiveness of a portion of principal or accrued interest, the charge-off is included in the historical charge-off rates applied to the collective evaluation methodology. Restructured loans are individually evaluated for impairment, and the amount of a restructured loan’s book value in excess of its fair value is accrued as a specific allocation in the allowance for loan losses. TDRs that experience a payment default are examined to determine whether the default indicates collateral dependency or cash flows below those that were used in the fair value measurement. TDRs, as well as all impaired loans, that are determined to be collateral dependent are charged down to fair value. Deficiencies indicated by impairment measurements for TDRs that are not may Collectively-Evaluated Loans The Company evaluated characteristics in the loan portfolio and determined major segments and smaller classes within each segment. These characteristics include collateral type, repayment sources, and (if applicable) the borrower’s business model. The methodology for calculating reserves for collectively-evaluated loans is applied at the class level. Portfolio Segments and Classes The segments and classes used in determining the allowance for loan losses, beginning in 2013 Real Estate Construction Construction, residential Construction, other Consumer Real Estate Equity lines Residential closed-end first Residential closed-end junior liens Investor-owned residential real estate Commercial Real Estate Multifamily real estate Commercial real estate, owner-occupied Commercial real estate, other Commercial Non Real Estate Commercial and Industrial Public Sector and IDA Public sector and IDA Consumer Non Real Estate Credit cards Automobile Other consumer loans Historical Loss Rates The Company’s allowance methodology for collectively-evaluated loans applies historical loss rates by class to current class balances as part of the process of determining required reserves. Class loss rates are calculated as the net charge-offs for the class as a percentage of average class balance. The Company averages loss rates for the most recent 8 Two loss rates for each class are calculated: total net charge-offs for the class as a percentage of average class loan balance (“class loss rate”), and total net charge-offs for the class as a percentage of average classified loans in the class (“classified loss rate”). Classified loans are those with risk ratings of “substandard” or lower. Net charge-offs in both calculations include charge-offs and recoveries of classified and non-classified loans as well as those associated with impaired loans. Class historical loss rates are applied to non-classified loan balances at the reporting date, and classified historical loss rates are applied to classified balances at the reporting date. Risk Factors In addition to historical loss rates, risk factors pertinent to credit risk for each class are analyzed to estimate reserves for collectively-evaluated loans. Factors include changes in national and local economic and business conditions, the nature and volume of classes within the portfolio, loan quality, loan officers’ experience, lending policies and the Company’s loan review system. The analysis of certain factors results in standard allocations to all segments and classes. These factors include the risk from changes in lending policies, loan officers’ average years of experience, unemployment levels, bankruptcy rates, interest rate environment, and competition/legal/regulatory environments. Factors analyzed for each class, with resultant allocations based upon the level of risk assessed for each class, include the risk from changes in loan review, levels of past due loans, levels of nonaccrual loans, current class balance as a percentage of total loans, and the percentage of high risk loans within the class. Additionally, factors specific to each segment are analyzed and result in allocations to the segment. Please refer to Note 1: Real estate construction loans are subject to general risks from changing commercial building and housing market trends and economic conditions that may The credit quality of consumer real estate is subject to risks associated with the borrower’s repayment ability and collateral value, measured generally by analyzing local unemployment and bankruptcy trends, local housing market trends, and interest rates. The commercial real estate segment includes loans secured by multifamily residential real estate, commercial real estate occupied by the owner/borrower, and commercial real estate leased to non-owners. Loans in the commercial real estate segment are impacted by economic risks from changing commercial real estate markets, rental markets for multi-family housing and commercial buildings, business bankruptcy rates, local unemployment and interest rate trends that would impact the businesses housed by the commercial real estate. Commercial non real estate loans are secured by collateral other than real estate, or are unsecured. Credit risk for commercial non real estate loans is subject to economic conditions, generally monitored by local business bankruptcy trends, and interest rates. Public sector and IDA loans are extended to municipalities and related entities. Credit risk is based upon the entity’s ability to repay and interest rate trends. Consumer non real estate includes credit cards, automobile and other consumer loans. Credit cards and certain other consumer loans are unsecured, while collateral is obtained for automobile loans and other consumer loans. Credit risk stems primarily from the borrower’s ability to repay, measured by average unemployment, average personal bankruptcy rates and interest rates. Factor allocations applied to each class are increased for loans rated special mention and increased to a greater extent for loans rated classified. The Company allocates additional reserves for “high risk” loans. High risk loans include junior liens, interest only and high loan to value loans. A detailed analysis showing the allowance roll-forward by portfolio segment and related loan balance by segment follows: Activity in th e Allowance for Loan Losses by S egment for the year ended December 31 , 201 7 Real Estate Construction Consumer Real Estate Commercial Real Estate Commercial Non Real Estate Public Sector and IDA Consumer Non Real Estate Unallocated Total Balance , December 31, 2016 $ 438 $ 1,830 $ 3,738 $ 1,063 $ 330 $ 644 $ 257 $ 8,300 Charge-offs --- (146 ) (139 ) (82 ) --- (452 ) --- (819 ) Recoveries --- 1 131 23 --- 132 --- 287 Provision for loan losses (101 ) 342 (686 ) 68 89 383 62 157 Balance, December 31, 201 7 $ 337 $ 2,027 $ 3,044 $ 1,072 $ 419 $ 707 $ 319 $ 7,925 Activity in th e Allowance for Loan Losses by S egment for the year ended December 31 , 201 6 Real Estate Construction Consumer Real Estate Commercial Real Estate Commercial Non Real Estate Public Sector and IDA Consumer Non Real Estate Unallocated Total Balance , December 31, 2015 $ 576 $ 1,866 $ 4,109 $ 655 $ 436 $ 627 $ 28 $ 8,297 Charge-offs (29 ) (133 ) (488 ) (883 ) --- (273 ) --- (1,806 ) Recoveries --- 2 83 10 --- 64 --- 159 Provision for loan losses (109 ) 95 34 (1,281 ) (106 ) 226 229 1,650 Balance, December 31, 201 6 $ 438 $ 1,830 $ 3,738 $ 1,063 $ 330 $ 644 $ 257 $ 8,300 Activity in th e Allowance for Loan Losses by S egment for the year ended December 31 , 201 5 Real Estate Construction Consumer Real Estate Commercial Real Estate Commercial Non Real Estate Public Sector and IDA Consumer Non Real Estate Unallocated Total Balance , December 31, 2014 $ 612 $ 1,662 $ 3,537 $ 1,475 $ 327 $ 602 $ 48 $ 8,263 Charge-offs --- (205 ) (1,114 ) (490 ) --- (311 ) --- (2,120 ) Recoveries --- 2 49 1 --- 93 --- 145 Provision for loan losses (36 ) 407 1,637 (331 ) 109 243 (20 ) 2,009 Balance, December 31, 201 5 $ 576 $ 1,866 $ 4,109 $ 655 $ 436 $ 627 $ 28 $ 8,297 Allowance for Loan Losses by Segment and Evaluation Method as of December 31, 201 7 Real Estate Construction Consumer Real Estate Commercial Real Estate Commercial Non Real Estate Public Sector and IDA Consumer Non Real Estate Unallocated Total Individually evaluated for impairment $ --- $ 16 $ --- $ 160 $ --- $ 1 $ --- $ 177 Collectively evaluated for impairment 337 2,011 3,044 912 419 706 319 7,748 Total $ 337 $ 2,027 $ 3,044 $ 1,072 $ 419 $ 707 $ 319 $ 7,925 Loans by Segment and Evaluation Method as of December 31, 201 7 Real Estate Construction Consumer Real Estate Commercial Real Estate Commercial Non Real Estate Public Sector and IDA Consumer Non Real Estate Unallocated Total Individually evaluated for impairment $ 2,882 $ 1,267 $ 6,516 $ 1,229 $ --- $ 30 $ --- $ 11,924 Collectively evaluated for impairment 31,812 165,698 333,898 39,289 51,443 34,618 --- 656,758 Total $ 34,694 $ 166,965 $ 340,414 $ 40,518 $ 51,443 $ 34,648 $ --- $ 668,682 Allowance for Loan Losses by Segment and Evaluation Method as of December 31, 201 6 Real Estate Construction Consumer Real Estate Commercial Real Estate Commercial Non Real Estate Public Sector and IDA Consumer Non Real Estate Unallocated Total Individually evaluated for impairment $ --- $ 25 $ 1 $ --- $ --- $ --- $ --- $ 26 Collectively evaluated for impairment 438 1,805 3,737 1,063 330 644 257 8,274 Total $ 438 $ 1,830 $ 3,738 $ 1,063 $ 330 $ 644 $ 257 $ 8,300 Loans by Segment and Evaluation Method as of December 31, 201 6 Real Estate Construction Consumer Real Estate Commercial Real Estate Commercial Non Real Estate Public Sector and IDA Consumer Non Real Estate Unallocated Total Individually evaluated for impairment $ 270 $ 877 $ 7,782 $ 241 $ --- $ 3 $ --- $ 9,173 Collectively evaluated for impairment 36,075 156,841 328,675 38,783 45,474 33,525 --- 639,373 Total $ 36,345 $ 157,718 $ 336,457 $ 39,024 $ 45,474 $ 33,528 $ --- $ 648,546 A summary of ratios for the allowance for loan losses follows: December 31, 201 7 20 16 Ratio of allowance for loan losses to the end of period loans, net of unearned income and deferred fees and costs 1.19 % 1.28 % Ratio of net charge-offs to average loans, net of unearned income and deferred fees and costs 0.08 % 0.26 % A summary of nonperforming assets follows: December 31, 201 7 20 16 Nonperforming assets: Nonaccrual loans $ 6 $ 1,168 Restructured loans in nonaccrual 2,763 4,687 Total nonperforming loans 2,769 5,855 Other real estate owned, net 2,817 3,156 Total nonperforming assets $ 5,586 $ 9,011 Ratio of nonperforming assets to loans, net of unearned income and deferred fees and costs, plus other real estate owned 0.83 % 1.38 % Ratio of allowance for loan losses to nonperforming loans ( 1 ) 286.20 % 141.76 % ( 1 The Company defines nonperforming loans as total nonaccrual and restructured loans that are nonaccrual. Loans 90 A summary of loans past due 90 December 31, 201 7 20 16 Loans past due 90 days or more and still accruing $ 51 $ 63 Ratio of loans past due 90 days or more and still accruing to loans, net of unearned income and deferred fees and costs 0.01 % 0.01 % Accruing restructured loans $ 5,134 $ 3,769 Impaired loans : Impaired loans with no valuation allowance $ 10,444 $ 8,269 Impaired loans with a valuation allowance 1,480 904 Total impaired loans $ 11,924 $ 9,173 Valuation allowance $ (177 ) $ (26 ) Impaired loans, net of allowance $ 11,747 $ 9,147 Average recorded investment in impaired loans (1) $ 13,344 $ 11,585 Income recognized on impaired loans , after designation as impaired $ 528 $ 553 Amount of income recognized on a cash basis $ --- $ --- ( 1 Recorded investment is net of charge-offs and interest paid while a loan is in nonaccrual status. No December 31, 2017, 2016 2015. A detailed analysis of investment in impaired loans, associated reserves and interest income recognized, by loan class follows: Impaired Loans as of December 31, 201 7 Principal Balance (A) Total Recorded Investment (1) Recorded Investment (1) Recorded Investment (1) Related Allowance Real Estate Construction (2) Construction other $ 2,882 $ 2,882 $ 2,882 $ --- $ --- Co nsumer Real Estate (2) Residential closed-end first liens 807 768 590 178 10 Residential closed-end junior liens 174 174 --- 174 6 Investor-owned residential real estate 347 325 325 --- --- Commercial Real Estate (2) Multifamily real estate 303 303 303 --- --- Commercial real estate, owner occupied 3,619 3,611 3,611 --- --- Commercial real estate, other 2,921 2,602 2,602 --- --- Commercial Non Real Estate (2) Commercial and Industrial 1,236 1,229 126 1,103 160 Consumer Non Real Estate (2) Automobile 30 30 5 25 1 Total $ 12,319 $ 11,924 $ 10,444 $ 1,480 $ 177 Impaired Loans as of December 31, 201 6 Principal Balance (A) Total Recorded Investment (1) Recorded Investment (1) Recorded Investment (1) Related Allowance Real Estate Construction (2) Construction 1-4 family residential $ 280 $ 270 $ 270 $ --- $ --- Co nsumer Real Estate (2) Residential closed-end first liens 648 609 267 342 14 Residential closed-end junior liens 195 195 --- 195 7 Investor-owned residential real estate 73 73 --- 73 4 Commercial Real Estate (2) Multifamily real estate 1,364 1,091 1,091 --- --- Commercial real estate, owner occupied 4,005 3,957 3,663 294 1 Commercial real estate, other 2,997 2,734 2,734 --- --- Commercial Non Real Estate (2) Commercial and Industrial 255 241 241 --- --- Consumer Non Real Estate (2) Automobile 3 3 3 --- --- Total $ 9,820 $ 9,173 $ 8,269 $ 904 $ 26 ( 1 Recorded investment is net of charge-offs and interest paid while a loan is in nonaccrual status. ( 2 Only classes with impaired loans are shown. Average Investment and Interest Income for Impaired Loans For the Year Ended December 31, 201 7 Average Recorded Investment (1) Interest Income Recognized Real Estate Construction (2) Construction other $ 3,298 $ 177 Consumer Real Estate (2) Residential closed-end first liens 781 57 Residential closed-end junior liens 185 11 Investor-owned residential real estate 329 1 Commercial Real Estate (2) Multifamily real estate 748 16 Commercial real estate, owner occupied 4,047 200 Commercial real estate, other 2,638 --- Commercial Non Real Estate (2) Commercial and Industrial 1,282 64 Consumer Non Real Estate (2) Automobile 36 2 Total $ 13,344 $ 528 ( 1 ( 2 Average Investment and Interest Income for Impaired Loans For the Year Ended December 31, 201 6 Average Recorded Investment (1) Interest Income Recognized Real Estate Construction (2) Construction 1-4 family residential $ 462 $ 10 Consumer Real Estate (2) Residential closed-end first liens 642 38 Residential closed-end junior liens 207 13 Investor-owned residential real estate 74 4 Commercial Real Estate (2) Multifamily real estate 1,366 12 Commercial real estate, owner occupied 4,342 206 Commercial real estate, other 3,947 263 Commercial Non Real Estate (2) Commercial and Industrial 541 7 Consumer Non Real Estate (2) Automobile 4 --- Total $ 11,585 $ 553 ( 1 Recorded investment is net of charge-offs and interest paid while a loan is in nonaccrual status. ( 2 Only classes with impaired loans are shown. Average Investment and Interest Income for Impaired Loans For the Year Ended December 31, 201 5 Average Recorded Investment (1) Interest Income Recognized Real Estate Construction (2) Construction 1-4 family residential $ 612 $ 23 Consumer Real Estate (2) Residential closed-end first liens 681 43 Residential closed-end junior liens 228 15 Investor-owned residential real estate 76 5 Commercial Real Estate (2) Multifamily real estate 2,581 84 Commercial real estate, owner occupied 6,141 251 Commercial real estate, other 5,888 308 Commercial Non Real Estate (2) Commercial and Industrial 1,090 40 Total $ 17,297 $ 769 ( 1 Recorded investment is net of charge-offs and interest paid while a loan is in nonaccrual status. ( 2 Only classes with impaired loans are shown. An analysis of past due and nonaccrual loans follows: December 31, 201 7 3 0 – 89 Days Past Due 90 or M ore Days Past Due 90 or More Days Past Due and Still Accruing Nonaccruals (I ncluding Impaired Nonaccruals) Real Estate Construction Construction, residential $ --- $ --- $ --- $ --- Construction, other --- --- --- --- Consumer Real Estate Equity lines --- --- --- --- Residential closed-end first liens 637 16 11 145 Residential closed-end junior liens 188 --- --- --- Investor-owned residential real estate 66 --- --- 6 Commercial Real Estate Multifamily real estate 303 --- --- --- Commercial real estate, owner occupied 402 --- --- --- Commercial real estate, other --- 2,602 --- 2,602 Commercial Non Real Estate Commercial and Industrial 131 --- --- 15 Public Sector and IDA Public sector and IDA --- --- --- --- Consumer Non Real Estate Credit cards 7 12 12 --- Automobile 375 22 22 1 Other consumer loans 154 6 6 --- Total $ 2,263 $ 2,658 $ 51 $ 2,769 December 31, 201 6 3 0 – 89 Days Past Due 90 or M ore Days Past Due 90 or More Days Past Due and Still Accruing Nonaccruals (I ncluding Impaired Nonaccruals) Real Estate Construction Construction, residential $ --- $ --- $ --- $ 270 Construction, other 25 --- --- --- Consumer Real Estate Equity lines 10 --- --- --- Residential closed-end first liens 1,498 6 6 --- Residential closed-end junior liens 114 36 36 --- Investor-owned residential real estate 56 234 --- 253 Commercial Real Estate Multifamily real estate 132 1,091 --- 1,091 Commercial real estate, owner occupied 339 202 --- 1,183 Commercial real estate, other --- 80 --- 2,814 Commercial Non Real Estate Commercial and Industrial 6 218 --- 241 Public Sector and IDA Public sector and IDA --- --- --- --- Consumer Non Real Estate Credit cards 8 5 5 --- Automobile 234 12 12 3 Other consumer loans 131 4 4 --- Total $ 2,553 $ 1,888 $ 63 $ 5,855 The estimate of credit risk for non-impaired loans is obtained by applying allocations for internal and external factors. The allocations are increased for loans that exhibit greater credit quality risk. Credit quality indicators, which the Company terms risk grades, are assigned through the Company’s credit review function for larger loans and selective review of loans that fall below credit review thresholds. Loans that do not 75 75 50% 100% Determination of risk grades was completed for the portfolio as of December 31, 2017 2016. The following displays non-impaired gross loans by credit quality indicator: December 31, 201 7 Pass Special Mention (Excluding Impaired) Classified (Excluding Impaired) Real Estate Construction Construction, 1-4 family residential $ 10,396 $ --- $ --- Construction, other 21,416 --- --- Consumer Real Estate Equity lines 16,673 39 --- Closed-end first liens 85,975 2,400 355 Closed-end junior liens 4,483 29 12 Investor-owned residential real estate 55,410 66 256 Commercial Real Estate Multifamily residential real estate 95,894 127 --- Commercial real estate owner-occupied 130,256 246 763 Commercial real estate, other 106,612 --- -- Commercial Non Real Estate Commercial and Industrial 38,904 220 165 Public Sector and IDA States and political subdivisions 51,443 --- --- Consumer Non Real Estate Credit cards 5,493 --- --- Automobile 16,059 218 116 Other consumer 12,692 16 24 Total $ 651,706 $ 3,361 $ 1,691 December 31, 201 6 Pass Special Mention (Excluding Impaired) Classified (Excluding Impaired) Real Estate Construction Construction, 1-4 family residential $ 11,635 $ 3,648 $ --- Construction, other 20,972 --- --- Consumer Real Estate Equity lines 17,034 82 --- Closed-end first liens 83,658 1,267 580 Closed-end junior liens 4,861 15 151 Investor-owned residential real estate 48,277 333 583 Commercial Real Estate Multifamily residential real estate 99,002 1,733 --- Commercial real estate owner-occupied 120,170 1,188 1,425 Commercial real estate, other 103,534 1,543 80 Commercial Non Real Estate Commercial and Industrial 35,521 3,229 33 Public Sector and IDA States and political subdivisions 45,474 --- --- Consumer Non Real Estate Credit cards 5,978 --- --- Automobile 14,457 25 192 Other consumer 12,229 636 8 Total $ 622,802 $ 13,519 $ 3,052 Sales, Purchases and Reclassification of Loans The Company finances mortgages under “best efforts” contracts with mortgage purchasers. The mortgages are designated as held for sale upon initiation. There have been no Troubled Debt Restructurings From time to time the Company modifies loans in troubled debt restructurings (“TDRs”). The following tables present restructurings by class that occurred during the years ended December 31, 2017, 2016 2015. Note: Only classes with restructured loans are presented. Restructurings that occurred during the year ended December 31, 201 7 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (1) Consumer Real Estate Closed-end first lien 1 $ 8 $ 8 Commercial Real Estate Commercial real estate, other 1 132 132 Commercial Non Real Estate Commercial and industrial 4 1,221 1,221 Co nsumer N on R eal E state Automobile 4 26 26 Total 10 $ 1,387 $ 1,387 ( 1 Post-modification outstanding recorded investment considers amounts immediate ly following the modification. Amounts do not Each of the restructurings completed during the twelve December 31, 2017 not The commercial real estate loan was restructured to reduce monthly debt service by lowering the interest rate slightly and changing the interest method from variable to fixed. Interest was capitalized and the loan was re-amortized over a longer term. Impairment measurement, based on the present value of cash flows, did not The four Three one two The four 13 One $1. Restructurings that occurred during the year ended December 31, 201 6 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (1) Commercial Real Estate Commercial real estate, other 2 $ 3,008 $ 3,008 Commercial Non Real Estate Commercial and industrial 1 29 30 Consumer N on R eal E state Automobile 1 5 5 Total 4 $ 3,042 $ 3,043 ( 1 Post-modification outstanding recorded investment considers amounts immediate ly following the modification. Amounts do not During the twelve December 31, 2016, four Two 2014 2016 2014 2016 December 31, 2016 one one four not Restructurings that occurred during the year ended December 31, 201 5 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (1) Real Estate Construction Construction, 1-4 family residential 2 $ 718 $ 718 Commercial Real Estate Commercial real estate owner-occupied 3 2,710 2,623 Commercial Non Real Estate Commercial and industrial 1 200 200 Total 6 $ 3,628 $ 3,541 ( 1 Post-modification outstanding recorded investment considers amounts immediate ly following the modification. Amounts do not During the twelve December 31, 2015, six $100, December 31, 2015 no Two fourth 2015 December 31, 2015, $23. Two fourth 2015 December 31, 2015 no One fourth 2015 December 31, 2015 no Of the Company’s TDR’s that defaulted in 2017, 2016 2015, none 12 one 90

Note 6 - Premises and Equipment

Note 6 - Premises and Equipment	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Property, Plant and Equipment Disclosure [Text Block]	Note 6 : Premises and Equipment A summary of the cost and accumulated depreciation of premises and equipment follows: December 31, 20 17 20 16 Premises $ 12,434 $ 12,554 Furniture and equipment 5,238 5,052 Premises and equipment $ 17,672 $ 17,606 Accumulated depreciation (9,451 ) (8,753 ) Premises and equipment, net $ 8,221 $ 8,853 Depreciation expense for the years ended December 2017, 2016 2015 $805, $801 $749, December 2017, $134. The Company leases certain branch facilities under noncancellable operating leases. The future minimum lease payments under these leases (with initial or remaining lease terms in excess of one December 31, 2017 $292 2018, $233 2019, $56 2020, $34 2021, $34 2022 $130

Note 7 - Deposits

Note 7 - Deposits	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Deposit Liabilities Disclosures [Text Block]	Note 7 : Deposits The aggregate amounts of time deposits in denominations of $250 December 31, 2017 2016 $14,283 $15,797, December 31, 2017 201 8 76,378 201 9 30,124 2020 2,224 2021 2,931 202 2 3,227 Thereafter --- Total time deposits $ 114,884 At December 31, 2017 2016, $255 $417,

Note 8 - Employee Benefit Plans

Note 8 - Employee Benefit Plans	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Pension and Other Postretirement Benefits Disclosure [Text Block]	Note 8 : Employee Benefit Plans 401 The Company has a Retirement Accumulation Plan qualifying under IRS Code Section 401 may 100% December 31, 2017, 2016 2015, $340, $315 $294, Employee Stock Ownership Plan The Company has a non-leveraged Employee Stock Ownership Plan (ESOP) which enables employees of NBI and its subsidiaries who have one 21 January 1 July 1 not $200, $150 $200 December 31, 2017, 2016 2015, December 31, 2017, 236,221. 55 ten 50% not Salary Continuation Plan The Company has a non-qualified Salary Continuation Plan for certain key officers. The plan provides the participating officers with supplemental retirement income, payable for the greater of 15 2017, 2016, 2015, $272, $242, $396, Defined Benefit Plan The Company’s defined benefit pension plan covers substantially all employees. The plan benefit formula is based upon the length of service of retired employees and a percentage of qualified W- 2 December 31 , 201 7 201 6 201 5 Change in benefit obligatio n Projected benefit obligation at beginning of year $ 21,059 $ 20,427 $ 19,324 Service cost 692 694 620 Interest cost 743 757 669 Actuarial loss 1,417 198 798 Benefits paid (419 ) (1,017 ) (984 ) Projected benefit obligation at end of year $ 23,492 $ 21,059 $ 20,427 Change in plan asset s Fair value of plan assets at beginning of year $ 17,038 $ 16,131 $ 17,130 Actual return on plan assets 2,302 1,113 (155 ) Employer contribution 4,507 811 140 Benefits paid (419 ) (1,017 ) (984 ) Fair value of plan assets at end of year $ 23,428 $ 17,038 $ 16,131 Funded status at the end of the yea r $ (64 ) $ (4,021 ) $ (4,296 ) Amounts recognized in the Consolidated Balance Shee t Deferred tax asset $ 13 $ 1,407 $ 1,504 Other liabilities (64 ) (4,021 ) (4,296 ) Total amounts recognized in the Consolidated Balance Sheet $ (51 ) $ (2,614 ) $ (2,792 ) Amounts recognized in accumulated other comprehensive (loss), ne t Net gain (loss) $ (7,923 ) $ (8,250 ) $ (8,627 ) Prior service cost 340 449 559 Deferred tax asset 1,592 2,730 2,798 Amount recognized $ (5,991 ) $ (5,071 ) $ (5,270 ) Accrued/Prepaid benefit cost, ne t Benefit obligation $ (23,492 ) $ (21,059 ) $ (20,427 ) Fair value of assets 23,428 17,038 16,131 Unrecognized net actuarial loss 7,923 8,250 8,627 Unrecognized prior service cost (340 ) (449 ) (559 ) Deferred tax liability (1,579 ) (1,323 ) (1,294 ) Prepaid benefit cost included in other assets $ 5,940 $ 2,457 $ 2,478 Components of net periodic benefit cos t Service cost $ 692 $ 694 $ 620 Interest cost 743 757 669 Expected return on plan assets (1,097 ) (1,110 ) (1,166 ) Amortization of prior service cost (110 ) (110 ) (110 ) Recognized net actuarial loss 540 572 414 Net periodic benefit cost $ 768 $ 803 $ 427 Other changes in plan assets and benefit obligations recognized in other comprehensive los s Net (gain) loss $ (328 ) $ (377 ) $ 1,705 Amortization of prior service cost 110 110 110 Deferred income tax expense (benefit) 46 93 (635 ) Total recognized $ (172 ) $ (174 ) $ 1,180 Total recognized in net periodic benefit cost and other comprehensive loss $ 550 $ 536 $ 2,242 Weighted average assumptions at end of the yea r Discount rate used for net periodic pension cost 4.00 % 4.00 % 3.75 % Discount rate used for disclosure 3.50 % 4.00 % 4.00 % Expected return on plan assets 7.50 % 7.50 % 7.50 % Rate of compensation increase 3.00 % 3.00 % 3.00 % Long Term Rate of Return The Company, as plan sponsor, selects the expected long-term rate-of-return-on-assets assumption in consultation with its investment advisors and actuary. This rate is intended to reflect the average rate of earnings expected to be earned on the funds invested or to be invested to provide plan benefits. Historical performance is reviewed, especially with respect to real rates of return (net of inflation), for the major asset classes held or anticipated to be held by the trust, and for the trust itself. Undue weight is not may not Because assets are held in a qualified trust, anticipated returns are not not not The Company, as plan sponsor, has adopted a Pension Administrative Committee Policy (the Policy) for monitoring the investment management of its qualified plans. The Policy includes a statement of general investment principles and a listing of specific investment guidelines, to which the committee may The preferred target allocation for the assets of the defined benefit pension plan is 65% 35% no Fair value measurements of the pension plan’s assets at December 31, 2017 Fair Value Measurements at December 31, 20 1 7 Asset Category Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Cash $ 4,454 $ 4,454 $ --- $ --- Equity securities: U. S. companies 9,892 9,892 --- --- International companies 106 106 --- --- Equities mutual funds (1) 1,962 1,962 --- --- U. S. government agencies and corporations 51 --- 51 --- State and political subdivisions 231 --- 231 --- Corporate bonds – investment grade (2) 6,732 --- 6,732 --- Total pension plan assets $ 23,428 $ 16,414 $ 7,014 $ --- ( 1 This category comprises actively managed equity funds invested in large- cap and mid-cap U.S. companies. ( 2 This category represents investment grade bonds of U.S. issue rs from diverse industries. Fair Value Measurements at December 31, 20 1 6 Asset Category Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Cash $ 207 $ 207 $ --- $ --- Equity securities: U. S. companies 9,195 9,195 --- --- International companies 116 116 --- --- Equities mutual funds (1) 966 966 --- --- U. S. government agencies and corporations 53 --- 53 --- State and political subdivisions 230 --- 230 --- Corporate bonds – investment grade (2) 6,271 --- 6,271 --- Total pension plan assets $ 17,038 $ 10,484 $ 6,554 $ --- ( 1 This category comprises actively managed equity funds invested in large-cap and mid-cap U.S. companies. ( 2 This category represents investment grade bonds of U.S. issuers from diverse industries. The Company’s required minimum pension contribution for 2018 not Estimated future benefit payments, which reflect expected future service, as appropriate, are as follows: 201 8 $ 4,229 201 9 $ 1,060 2020 $ 1,630 202 1 $ 738 20 22 $ 1,277 2023 - 2027 $ 6,546

Note 9 - Stock Option Plan

Note 9 - Stock Option Plan	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	Note 9 : Stock Option Plan The Company’s 1999 1999 March 9, 2009. 1999 2005 none 2005. There were no 2017 2016. 2015, 7,500 $54. may No 2015.

Note 10 - Income Taxes

Note 10 - Income Taxes	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Income Tax Disclosure [Text Block]	Note 1 0 : Income Taxes The Company files United States federal income tax returns, and Virginia, West Virginia and North Carolina state income tax returns. With few exceptions, the Company is no 2014. Allocation of income tax expense between current and deferred portions is as follows: Years ended December 31, 20 17 20 16 20 15 Current $ 2,943 $ 3,934 $ 4,730 Deferred expense 1,790 18 10 Deferred tax adjustment for enacted change in tax rate 1,560 --- --- Total income tax expense $ 6,293 $ 3,952 $ 4,740 Income tax expense for 2017 $1,560 December 22, 2017. 35%. January 1, 2018, 21%. The following is a reconciliation of the “expected” income tax expense, computed by applying the U.S. Federal income tax rate of 35% Years ended December 31, 20 17 20 16 20 15 Computed “expected” income tax expense $ 7,135 $ 6,613 $ 7,201 Tax impact of enacted change in tax rate 1,560 --- --- Tax-exempt interest income (2,144 ) (2,234 ) (2,381 ) Nondeductible interest expense 89 92 101 Other, net (347 ) (519 ) (181 ) Reported income tax expense $ 6,293 $ 3,952 $ 4,740 The components of net deferred tax assets, included in other assets, are as follows: December 31, 20 17 20 16 Deferred tax assets: Allowance for loan losses and unearned fee income $ 1,773 $ 3,347 Valuation allowance on other real estate owned 156 237 Defined benefit plan 1,592 2,730 Deferred compensation and other liabilities 863 1,336 Discount accretion of securities --- 15 Net unrealized loss on securities available for sale 984 1,932 Total deferred tax assets $ 5,368 $ 9,597 Deferred tax liabilities: Fixed assets $ (388 ) $ (620 ) Deposit intangibles (1,059 ) (1,573 ) Defined benefit plan, prepaid portion (1,579 ) (1,345 ) Discount accretion of securities (2 ) Total deferred tax liabilities (3,028 ) (3,538 ) Net deferred tax asset s $ 2,340 $ 6,059 The Company has determined that a valuation allowance for the gross deferred tax assets is not December 31, 2017 2016.

Note 11 - Restrictions on Divid

Note 11 - Restrictions on Dividends	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Restrictions on Dividends, Loans and Advances [Text Block]	Note 11 : Restrictions on Dividends The Company’s principal source of funds for dividend payments is dividends received from its subsidiary bank. For the years ended December 31, 2017, 2016 2015, $8,141, $9,071 $7,930, $350 2016. Substantially all of Bankshares’ retained earnings are undistributed earnings of its sole banking subsidiary, which are restricted by various regulations administered by federal bank regulatory agencies. Bank regulatory agencies restrict, without prior approval, the total dividend payments of a bank in any calendar year to the bank’s retained net income of that year to date, as defined, combined with its retained net income of the preceding two December 31, 2017, $20,820.

Note 12 - Minimum Regulatory Ca

Note 12 - Minimum Regulatory Capital Requirement	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Regulatory Capital Requirements under Banking Regulations [Text Block]	Note 12 : Minimum Regulatory Capital Requirement The Company (on a consolidated basis) and its subsidiary bank are subject to various regulatory capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and possible additional discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s and the bank’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, the Company and the bank must meet specific capital guidelines that involve quantitative measures of their assets, liabilities, and certain off balance sheet items as calculated under regulatory accounting practices. The capital amounts and classification are also subject to qualitative judgments by regulators about components, risk weightings, and other factors. Prompt corrective action provisions are not The Basel III Capital Rules, a comprehensive capital framework for U.S. banking organizations, became effective for the Company and the Bank on January 1, 2015 ( January 1, 2019 1 “CET1” 1 1 The Company’s and the Bank’s CET1 CET1 CET1 Tier 1 CET1 1 December 31, 2017 2016, 1 CET1 Total capital includes Tier 1 2 2 Risk-weighted assets at December 31, 2017 $808,690 $805,656 December 31, 2016 $718,739 $715,294 December 31, 2017 2016, As of December 31, 2017, 1 1 1 no December 31, 2017 2016 Actual Minimum Capital (1) Minimum To Be Well Amount Ratio Amount Ratio Amount Ratio December 31, 201 7 Total capital (to risk weighted assets) NBI consolidated $ 198,468 24.542 % $ 74,804 9.250 % N/A N/A NBB 195,903 24.316 % 74,523 9.250 % $ 80,566 10.000 % Tier 1 capital (to risk weighted assets) NBI consolidated $ 190,543 23.562 % $ 58,630 7.250 % N/A N/A NBB 187,978 23.332 % 58,410 7.250 % $ 64,452 8.000 % Common Equity Tier 1 capital (to risk weighted assets) NBI consolidated $ 190,543 23.562 % $ 46,500 5.750 % N/A N/A NBB 187,978 23.332 % 46,325 5.750 % $ 52,368 6.500 % Tier 1 capital (to average assets) NBI consolidated $ 190,543 15.424 % $ 49,413 4.000 % N/A N/A NBB 187,978 15.254 % 49,293 4.000 % $ 61,616 5.000 % ( 1 Except with regard to the Company ’s and the Bank’s Tier 1 1.25% four .0625% 2016 2019, January 2019 ( 2.5% CET1 Actual Minimum Capital Minimum To Be Well Amount Ratio Amount Ratio Amount Ratio December 31, 201 6 Total capital (to risk weighted assets) NBI consolidated $ 191,006 26.575 % $ 57,499 8.625 % N/A N/A NBB 188,095 26.296 % 57,224 8.625 % $ 71,529 10.000 % Tier 1 capital (to risk weighted assets) NBI consolidated $ 182,706 25.420 % $ 43,124 6.625 % N/A N/A NBB 179,795 25.136 % 42,918 6.625 % $ 57,224 8.000 % Common Equity Tier 1 capital (to risk weighted assets) NBI consolidated $ 182,706 25.420 % $ 32,343 5.125 % N/A N/A NBB 179,795 25.136 % 32,188 5.125 % $ 46,494 6.500 % Tier 1 capital (to average assets) NBI consolidated $ 182,706 15.121 % $ 48,333 4.000 % N/A N/A NBB 179,795 14.964 % 48,060 4.000 % $ 60,075 5.000 %

Note 13 - Condensed Financial S

Note 13 - Condensed Financial Statements of Parent Company	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Condensed Financial Information of Parent Company Only Disclosure [Text Block]	Note 1 3 : Condensed Financial Statements of Parent Company Financial information pertaining only to NBI (Parent) is as follows: Condensed Balance Sheets December 31, 20 17 20 16 Assets Cash due from subsidiaries $ 46 $ 74 Interest-bearing deposits 503 1,310 Securities available for sale , at fair value --- 163 Investments in subsidiaries, at equity 184,336 177,150 Refundable income taxes 168 22 Other assets 820 561 Total assets $ 185,873 $ 179,280 Liabilities a nd Stockholders’ Equity Other liabilities $ 977 $ 1,017 Stockholders ’ equity 184,896 178,263 Total liabilities and stockholders ’ equity $ 185,873 $ 179,280 Condensed Statements of Income Years Ended December 31, 20 17 20 16 20 15 Income Dividends from subsidiaries $ 8,141 $ 9,421 $ 7,930 Interest on securities – taxable --- 2 3 Realized securities gains, net 4 --- --- Other income 1,018 987 1,208 Total income 9,163 10,410 9,141 Expenses Other expenses 1,986 1,992 2,051 Income before income tax benefit and equity in undistributed net income of subsidiaries 7,177 8,418 7,090 Applicable income tax benefit 383 628 210 Income before equity in undistributed net income of subsidiaries 7,560 9,046 7,300 Equity in undistributed net income of subsidiaries 6,532 5,896 8,533 Net income $ 14,092 $ 14,942 $ 15,833 Condensed Statements of Cash Flows Years ended December 31, 20 17 20 16 20 15 Cash Flows f rom Operating Expenses Net income $ 14,092 $ 14,942 $ 15,833 Adjustments to reconcile net income to net cash provided by operating activities: Equity in undistributed net income of subsidiaries (6,532 ) (5,896 ) (8,533 ) Amortization of premiums and accretion of discounts, net --- 1 1 Depreciation expense --- --- 3 Gain on sale of securities (4 ) --- --- Loss on disposal of fixed assets --- --- 2 Net change in refundable income taxes due from subsidiaries (146 ) (223 ) 106 Net change in other assets (156 ) 219 (81 ) Net change in other liabilities (40 ) (227 ) 128 Net cash provided by operating activities 7,214 8,816 7,459 Cash Flows f rom Investing Activities Net change in interest-bearing deposits 807 (1,140 ) 307 Maturities, sales and calls of securities available for sale 192 --- --- Maturities and calls of securities held to maturity --- 450 --- Capital distribution to subsidiary (100 ) --- --- Net cash provided by (used in) investing activities 899 (690 ) 307 Cash Flows f rom Financing Activities Cash dividends paid (8,141 ) (8,071 ) (7,930 ) Exercise of stock options --- --- 173 Net cash used in financing activities (8,141 ) (8,071 ) (7,757 ) Net change in cash (28 ) 55 9 Cash due from subsidiaries at beginning of year 74 19 10 Cash due from subsidiaries at end of year $ 46 $ 74 $ 19

Note 14 - Financial Instruments

Note 14 - Financial Instruments With Off-balance Sheet Risk	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Financial Instruments Disclosure [Text Block]	Not e 14 : Financial Instruments with Off-Balance Sheet Risk The Company is a party to financial instruments with off-balance sheet risk in the normal course of business to meet the financing needs of its customers. These financial instruments include commitments to extend credit, standby letters of credit and interest rate locks. These instruments involve, to varying degrees, elements of credit risk in excess of the amount recognized in the consolidated balance sheets. The Company’s exposure to credit loss, in the event of nonperformance by the other party to the financial instrument for commitments to extend credit and standby letters of credit, is represented by the contractual amount of those instruments. The Company uses the same credit policies in making commitments and conditional obligations as it does for on-balance sheet instruments. The Company may At December 31, 2017 2016, December 31, 20 17 20 16 Financial instruments whose contract amounts represent credit risk: Commitments to extend credit $ 161,222 $ 130,252 Standby letters of credit 16,351 20,499 Mortgage loans sold with potential recourse 14,130 17,526 Commitments to extend credit are agreements to lend to a customer as long as there is no may may not Unfunded commitments under commercial lines of credit, revolving credit lines, and overdraft protection agreements are commitments for possible future extensions of credit. Some of these commitments are uncollateralized and do not may not Standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third may The Company originates mortgage loans for sale to secondary market investors subject to contractually specified and limited recourse provisions. In 2017, $13,912 $14,130 $17,090 $17,526 2016. may may may twelve At December 31, 2017, $707 $260. not The Company maintains cash accounts in other commercial banks. The Company had $14 December 31, 2017 not

Note 15 - Concentrations of Cre

Note 15 - Concentrations of Credit Risk	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Concentration Risk Disclosure [Text Block]	Note 1 5 : Concentrations of Credit Risk The Company does a general banking business, serving the commercial and personal banking needs of its customers. NBB’s primary service area is defined as the counties of Montgomery, Giles, Carroll, Grayson, Pulaski, Tazewell, Smyth, Wythe, Roanoke and Washington and the cities of Galax, Radford and Roanoke in southwest Virginia, and Mercer and McDowell counties in West Virginia. For loan purposes, our trade area also includes the Virginia cities of Salem and Bristol and counties of Botetourt and Craig, the southernmost tip of West Virginia adjacent to the counties of Giles, Buchanan, Russell and Bland, the North Carolina counties of Surry and Alleghany, and the Tennessee city of Bristol and counties of Washington and Sullivan. Substantially all of NBB’s loans are made in its primary service area. Additionally, the Company occasionally participates in loans in nearby higher growth metropolitan areas. Loans outside of the primary service area are a small percentage of the loan portfolio, are appropriately underwritten and are not Commercial real estate as of December 31, 2017 2016 51% 52% $340,414 $336,457, $247,198 $236,552 December 31, 2017 2016 37% December 31, 2017 36% December 31, 2016. $166,965, 25% $157,718, 24% December 31, 2017 2016, 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.

Note 16 - Fair Value Measuremen

Note 16 - Fair Value Measurements	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Fair Value Disclosures [Text Block]	Note 1 6 : Fair Value Measurements The fair value of a financial instrument is the current amount that would be exchanged between willing parties, other than in a forced liquidation. Fair value is best determined based upon quoted market prices. However, in many instances, there are no not may not may not The Company records fair value adjustments to certain assets and liabilities and determines fair value disclosures utilizing a definition of fair value of assets and liabilities that states that fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. Additional considerations are involved to determine the fair value of financial assets in markets that are not The Company uses a hierarchy of valuation techniques based on whether the inputs to those valuation techniques are observable or unobservable. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Company’s market assumptions. The three two Level 1 – Valuation is based on quoted prices in active markets for identical assets and liabilities. Level 2 – Valuation is based on observable inputs including quoted prices in active markets for similar assets and liabilities, quoted prices for identical or similar assets and liabilities in less active markets, and model-based valuation techniques for which significant assumptions can be derived primarily from or corroborated by observable data in the market. Level 3 – Valuation is based on model-based techniques that use one The following describes the valuation techniques used by the Company to measure certain financial assets and liabilities recorded at fair value on a recurring basis in the financial statements: Securities A vailable for S ale Securities available for sale are recorded at fair value on a recurring basis. Fair value measurement is based upon quoted market prices, when available (Level 1 not may 2 The following tables present the balances of financial assets measured at fair value on a recurring basis as of December 31, 2017 2016: Fair Value Measurements at December 31, 20 17 Using Description Balance as of December 31, Quoted Prices in Active Significant Other Significant Unobservable Inputs U.S. Government agencies and corporations $ 307,719 $ --- $ 307,719 $ --- States and political subdivisions 16,834 --- 16,834 --- Mortgage-backed securities 659 --- 659 --- Corporate debt securities 6,175 --- 6,175 --- Total securities available for sale $ 331,387 $ --- $ 331,387 $ --- Fair Value Measurements at December 31, 20 16 Using Description Balance as of December 31, Quoted Prices in Active Significant Other Significant Unobservable Inputs U.S. Government agencies and corporations $ 285,598 $ --- $ 285,598 $ --- States and political subdivisions 11,693 --- 11,693 --- Mortgage-backed securities 930 --- 930 --- Corporate debt securities 5,898 --- 5,898 --- Other securities 163 --- 163 --- Total securities available for sale $ 304,282 $ --- $ 304,282 $ --- Certain financial assets are measured at fair value on a nonrecurring basis in accordance with GAAP. Adjustments to the fair value of these assets usually result from the application of lower-of-cost-or-market accounting or write-downs of individual assets. The following describes the valuation techniques used by the Company to measure certain financial assets recorded at fair value on a nonrecurring basis in the financial statements: Loans H eld for S ale Loans held for sale are carried at the lower of cost or market value. These loans currently consist of one four not 2 No December 31, 2017 2016. Impaired Loans Loans are designated as impaired when, in the judgment of management based on current information and events, it is probable that all amounts due will not The fair value of an impaired loan and measurement of associated loss is based on one three 1 3 Loans measured using the fair value of collateral method may 2 3. may The Company bases collateral method fair valuation upon the “as-is” value of independent appraisals or evaluations. Valuations for impaired loans with outstanding principal balances of $250 $100 one $100, $250, The value of real estate collateral is determined by a current (less than 12 2. 3. 3. 2 ’ financial statements (Level 3 not 3 As of December 31, 201 7 December 31, 2016, The following table summarizes the Company’s financial assets that were measured at fair value on a nonrecurring basis during the period. Carrying value Date Description Balance Quoted Prices in Active Significant Other Significant Unobservable Inputs Assets: December 31, 201 7 Impaired loans net of valuation allowance $ 1,303 $ --- $ --- $ 1,303 December 31, 201 6 Impaired loans net of valuation allowance 878 --- --- 878 The following table presents information about Level 3 Impaired Loans Valuation Technique Unobservable Input Range (Weighted Average) December 31, 2017 Present value of cash flows Discount rate 5.50% - 13.25% (5.92%) December 31, 2016 Present value of cash flows Discount rate 6.75% - 8.00% (7.35%) Other Real Estate Owned Certain assets such as other real estate owned (OREO) are measured at fair value less cost to sell. Valuation of other real estate owned is determined using current appraisals from independent parties, a level two 3 3 The following table summarizes the Company’s other real estate owned that were measured at fair value on a nonrecurring basis during the period. Carrying Value Date Description Balance Quoted Prices in Active Significant Other Significant Unobservable Inputs Assets: December 31, 201 7 Other real estate owned net of valuation allowance $ 2,817 $ --- $ --- $ 2,817 December 31, 201 6 Other real estate owned net of valuation allowance 3,156 --- --- 3,156 The following table presents information about Level 3 December 31, 2017. Valuation Technique Unobservable Input Rang (Weighted Average) Other real estate owned Discounted appraised value Selling cost 2.00% (1) – 6.01% (4.72%) Other real estate owned Discounted appraised value Discount for lack of marketability and age of appraisal 1.68% – 68.33% (11.07%) The following table presents information about Level 3 December 31, 2016. Valuation Technique Unobservable Input Range (Weighted Average) Other real estate owned Discounted appraised value Selling cost 2.91% (1) – 8.60% (6.48%) Other real estate owned Discounted appraised value Discount for lack of marketability and age of appraisal 0% – 53.46% (13.66%) ( 1 The Company markets other real estate owned both independently and with local realtors. Properties marketed by realtors are discounted by selling costs. Properties that the Company markets independently are not The following methods and assumptions were used by the Company in estimating fair value disclosures for financial instruments: Cash and Due from Bank , and Interest-Bearing Deposits The carrying amounts approximate fair value. Securities The fair values of securities, excluding restricted stock, are determined by quoted market prices or dealer quotes. The fair value of certain state and municipal securities is not Loans Held for Sale Fair values of loans held for sale are based on commitments on hand from investors or prevailing market prices. Loans Fair values are estimated for portfolios of loans with similar financial characteristics. Loans are segregated by type such as commercial, real estate – commercial, real estate – construction, real estate – mortgage, credit card and other consumer loans. Each loan category is further segmented into fixed and adjustable rate interest terms and by performing and nonperforming categories. The fair value of performing loans is calculated by discounting scheduled cash flows through the estimated maturity using estimated market discount rates that reflect the credit and interest rate risk inherent in the loan, as well as estimates for prepayments. The estimate of maturity is based on the Company’s historical experience with repayments for loan classification, modified, as required, by an estimate of the effect of economic conditions on lending. Fair value for significant nonperforming loans is based on estimated cash flows which are discounted using a rate commensurate with the risk associated with the estimated cash flows. Assumptions regarding credit risk, cash flows and discount rates are determined within management’s judgment, using available market information and specific borrower information. Bank-Owned Life Insurance Bank-owned life insurance represents insurance policies on officers of the Company. The cash values of the policies are estimates using information provided by insurance carriers. These policies are carried at their cash surrender value, which approximates fair value. Deposits The fair value of demand and savings deposits is the amount payable on demand. The fair value of fixed maturity term deposits and certificates of deposit is estimated using the rates currently offered for deposits with similar remaining maturities. Accrued Interest The carrying amounts of accrued interest approximate fair value. Commitments to Extend Credit and Standby Letters of Credit The only amounts recorded for commitments to extend credit, standby letters of credit and financial guarantees written are the deferred fees arising from these unrecognized financial instruments. These deferred fees are not December 31, 2017 2016, not The estimated fair values, and related carrying amounts, of the Company’s financial instruments are as follows: December 31, 2017 Estimated Fair Value Carrying Amount Level 1 Level 2 Level 3 Financial assets: Cash and due from banks $ 12,926 $ 12,926 $ --- $ --- Interest-bearing deposits 51,233 51,233 --- --- Securities 458,551 --- 461,500 --- Restricted securities 1,200 --- 1,200 --- Mortgage loans held for sale 260 --- 260 --- Loans, net 660,144 --- --- 656,399 Accrued interest receivable 5,297 --- 5,297 --- Bank-owned life insurance 33,756 --- 33,756 --- Financial liabilities: Deposits $ 1,059,734 $ --- $ 944,850 $ 113,053 Accrued interest payable 62 --- 62 --- December 31, 201 6 Estimated Fair Value Carrying Amount Level 1 Level 2 Level 3 Financial assets: Cash and due from banks $ 13,974 $ 13,974 $ --- $ --- Interest-bearing deposits 80,268 80,268 --- --- Securities 439,239 --- 441,974 --- Restricted securities 1,170 --- 1,170 --- Mortgage loans held for sale 478 --- 478 --- Loans, net 639,452 --- --- 658,386 Accrued interest receivable 5,260 --- 5,260 --- Bank-owned life insurance 22,998 --- 22,998 --- Financial liabilities: Deposits $ 1,043,442 $ --- $ 912,828 $ 128,690 Accrued interest payable 55 --- 55 ---

Note 17 - Components of Accumul

Note 17 - Components of Accumulated Other Comprehensive Income (Loss)	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Comprehensive Income (Loss) Note [Text Block]	Note 1 7 : Components of Accumulated Other Comprehensive Income (Loss) The following table summarizes the activity related to each component of accumulated other comprehensive income (loss): Net Unrealized Gain (Loss) on Securities Adjustments Related to Pension Benefits Accumulated Other Comprehensive Income (Loss) Balance at December 31, 201 4 $ (1,582 ) $ (4,090 ) $ (5,672 ) Unrealized holding loss on available for sale securities net of tax of ($571) (1,064 ) --- (1,064 ) Reclassification adjustment, net of tax of ($1 2) (21 ) --- (21 ) Net pension loss arising during the period, net of tax of ($597) --- (1,108 ) (1,108 ) Less amortization of prior service cost included in net periodic pensi on cost, net of tax of ($38) --- (72 ) (72 ) Balance at December 31, 201 5 $ (2,667 ) $ (5,270 ) $ (7,937 ) Unrealized holding loss on available for sa le securities net of tax of ($431) (800 ) --- (800 ) Reclassification adjustment, net of tax of ($65) (121 ) --- (121 ) Net pension gain arising during the period, net of tax of $132 --- 271 271 Less amortization of prior service cost included in net periodic pension cost, net of tax of ($38) --- (72 ) (72 ) Balance at December 31, 201 6 $ (3,588 ) $ (5,071 ) $ (8,659 ) Unrealized holding gain on available for sale securities net of tax of $296 546 --- 546 Reclassification a djustment, net of tax of ($4) (6 ) --- (6 ) Net pension gain arising during the period, net of tax of $115 --- 213 213 Less amortization of prior service cost included in net periodic pension cost, net of tax of ($38) --- (71 ) (71 ) Reclassification of stranded tax effects from change in tax rate (656 ) (1,062 ) (1,718 ) Balance at December 31, 201 7 $ (3,704 ) $ (5,991 ) $ (9,695 ) The following table provides information regarding reclassifications out of accumulated other comprehensive income (loss) for the years ended December 31, 2017, 2016 2015: December 31, 201 7 201 6 201 5 Component of Accumulated Other Comprehensive Income (Loss) Reclassification out of unrealized gains and losses on available-for-sale securities: Realized securities gain, net $ (10 ) $ (186 ) $ (33 ) Income tax benefit (4 ) (65 ) (12 ) Realized gain on available-for-sale securities, net of tax, reclassified out of accumulated other comprehensive income (loss) $ (6 ) $ (121 ) $ (21 ) Amortization of defined benefit pension items: Pr ior service costs (1) $ (109 ) $ (110 ) $ (110 ) Income tax benefit (38 ) (38 ) (38 ) Amortization of defined benefit pension items , net of tax, reclassified out of accumulated other comprehensive income (loss) $ (71 ) $ (72 ) $ (72 ) ( 1 This accumulated other comprehensive income (loss) component is included in the computation of net periodic benefit cost. (For additional information, see Note 8,

Note 18 - Intangible Assets and

Note 18 - Intangible Assets and Goodwill	12 Months Ended
	Dec. 31, 2017
Notes to Financial Statements
Goodwill and Intangible Assets Disclosure [Text Block]	Note 1 8 . Intangible Assets and Goodwill In accounting for goodwill and intangible assets, the Company conducts an impairment review at least annually and more frequently if certain impairment indicators are evident. Accounting guidance provides the option of performing a preliminary assessment of qualitative factors before performing more substantial testing for impairment. If the preliminary assessment indicates that it is more likely than not two not two no 2017, 2016 2015. Information concerning goodwill and intangible assets for years ended December 31, 2017 2016 Gross Carrying Value Accumulated Amortization Net Carrying Value December 31, 20 17 Amortizable core deposit intangibles $ 16,257 $ 16,207 $ 50 Unamortizable goodwill 5,848 --- 5,848 Intangible assets and goodwill $ 22,105 $ 16,207 $ 5,898 December 31, 20 16 Amortizable core deposit intangibles $ 16,257 $ 16,139 $ 118 Unamortizable goodwill 5,848 --- 5,848 Intangible assets and goodwill $ 22,105 $ 16,139 $ 5,966 As of December 31, 2017, 201 8 50 Thereafter --- Total $ 50

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2017
Accounting Policies [Abstract]
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and Cash Equivalents For purposes of the consolidated statements of cash flows, cash and cash equivalents include cash and amounts due from banks.
Interest-bearing Deposits [Policy Text Block]	Interest-Bearing Deposits The Company invests over-night funds in interest-bearing deposits at other banks, including the Federal Home Loan Bank, the Federal Reserve, and other entities. Interest-bearing deposits are carried at cost.
Marketable Securities, Policy [Policy Text Block]	Securities Certain debt securities that management has the positive intent and ability to hold to maturity are classified as “held to maturity” and recorded at amortized cost. Trading securities are recorded at fair value with changes in fair value included in earnings. Securities not The Company follows the accounting guidance related to recognition and presentation of other-than-temporary impairment. The guidance specifies that if (a) an entity does not not not not For equity securities, when the Company decides to sell an impaired available-for-sale security and the Company does not not
Finance, Loan and Lease Receivables, Held-for-sale, Policy [Policy Text Block]	Loans Held for Sale Loans originated and intended for sale in the secondary market are carried at the lower of cost or estimated fair value on an individual loan basis. Net unrealized losses, if any, are recognized through a valuation allowance by charges to income. Loans held for sale are sold with the mortgage servicing rights released by the Company.
Finance, Loan and Lease Receivables, Held-for-investment, Policy [Policy Text Block]	Loans The Company, through its banking subsidiary, provides mortgage, commercial, and consumer loans to customers. A substantial portion of the loan portfolio is represented by mortgage loans, particularly commercial mortgages. The ability of the Company’s debtors to honor their contracts is dependent upon the real estate and general economic conditions in the Company’s market area. The Company’s loans are grouped into six Real estate construction loans are subject to general risks from changing commercial building and housing market trends and economic conditions that may not may The credit quality of consumer real estate is subject to risks associated with the borrower’s repayment ability and collateral value, measured generally by analyzing local unemployment and bankruptcy trends, and local housing market trends and interest rates. Risks specific to a borrower are determined by previous repayment history, loan-to-value ratios and debt-to-income ratios. The commercial real estate segment includes loans secured by multifamily residential real estate, commercial real estate occupied by the owner/borrower, and commercial real estate leased to non-owners. Loans in the commercial real estate segment are impacted by economic risks from changing commercial real estate markets, rental markets for multi-family housing and commercial buildings, business bankruptcy rates, local unemployment rates and interest rate trends that would impact the businesses housed by the commercial real estate. Commercial non real estate loans are secured by collateral other than real estate, or are unsecured. Credit risk for commercial non real estate loans is subject to economic conditions, generally monitored by local business bankruptcy trends, interest rates, borrower repayment ability and collateral value (if secured). Public sector and IDA loans are extended to municipalities and related entities. Credit risk is based upon the entity’s ability to repay through either a direct obligation or assignment of specific revenues from an enterprise or other economic activity, and interest rate trends. Consumer non real estate includes credit cards, automobile and other consumer loans. Credit cards and certain other consumer loans are unsecured, while collateral is obtained for automobile loans and other consumer loans. Credit risk stems primarily from the borrower’s ability to repay. If the loan is secured, the company analyzes loan-to-value ratios. All consumer non real estate loans are analyzed for debt-to-income ratios and previous credit history, as well as for general risks for the portfolio, including local unemployment rates, personal bankruptcy rates and interest rates. Risks from delinquency trends and characteristics such as second Loans that management has the intent and ability to hold for the foreseeable future, or until maturity or payoff, generally are reported at their outstanding unpaid principal balances adjusted for the allowance for loan losses, any purchase premium or discount, unearned income and deferred fees or costs. Interest income is accrued on the unpaid principal balance. Unearned income on dealer-originated loans and loan origination fees, net of certain direct origination costs, are deferred and recognized as an adjustment of the related loan yield using the interest method. Purchase premium or discount is recognized as an adjustment of the related loan yield using the interest method. The Company considers multiple factors when determining whether to discontinue accrual of interest on individual loans. Generally loans are placed in nonaccrual status when collection of interest and/or full principal is considered doubtful. Interest accrual is discontinued at the time a commercial real estate loan or commercial non-real estate loan is 90 not 90 six may All interest accrued but not A loan is considered past due when a payment of principal and/or interest is due but not not 30 not not 30 30 89 90
Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block]	Allowance for Loan Losses The allowance for loan losses represents management’s estimate of probable losses inherent in the Company’s loan portfolio. A provision for estimated losses is charged to earnings to establish and maintain the allowance for loan losses at a level reflective of the estimated credit risk. When management determines that a loan balance or portion of a loan balance is not Management evaluates the allowance each quarter through a methodology that estimates losses on individual impaired loans and evaluates the effect of numerous factors on the credit risk of groups of homogeneous loans. Specific allowances are established for individually-evaluated impaired loans based on the excess of the loan balance relative to the fair value of the loan. Impaired loans are designated as such when current information indicates that it is probable that the Company will be unable to collect principal or interest when due according to the contractual terms of the loan agreement. Loan relationships exceeding $250,000 not Fair value of impaired loans is estimated in one three 1 2 3 General allowances are established for collectively-evaluated loans. Collectively-evaluated loans are grouped into classes based on similar characteristics. Factors considered in determining general allowances include net charge-off trends, internal risk ratings, delinquency and nonperforming rates, product mix, underwriting practices, industry trends and economic trends. The Company’s charge-off policy meets or is more stringent than the minimum standards required by regulators. When available information confirms that a specific loan or a portion thereof, within any loan class, is uncollectible the amount is charged off against the allowance for loan losses. Additionally, losses on consumer real estate and consumer non-real estate loans are typically charged off no 120 180 180 may may
Loans and Leases Receivable, Troubled Debt Restructuring Policy [Policy Text Block]	Troubled Debt Restructurings (“TDRs”) In situations where, for economic or legal reasons related to a borrower’s financial condition, management grants a concession to the borrower that it would not may
Rate Lock Commitments [Policy Text Block]	Rate Lock Commitments The Company enters into commitments to originate mortgage loans in which the interest rate on the loan is determined prior to funding (rate lock commitments). Rate lock commitments on mortgage loans that are intended to be sold are considered to be derivatives. The period of time between issuance of a loan commitment and closing and sale of the loan generally ranges from 30 60 not The market value of rate lock commitments and best efforts contracts is not not no
Property, Plant and Equipment, Policy [Policy Text Block]	Premises and Equipment Land is carried at cost. Premises and equipment are stated at cost, net of accumulated depreciation. Depreciation is charged to expense over the estimated useful lives of the assets on the straight-line basis. Depreciable lives include 40 3 10 3
Loans and Leases Receivable, Real Estate Acquired Through Foreclosure, Policy [Policy Text Block]	Other Real Estate Owned Real estate acquired through or in lieu of foreclosure is held for sale and is initially recorded at fair value less estimated costs to sell at the date of foreclosure, establishing the cost basis of the asset. Subsequent to foreclosure, valuations are periodically performed by management and the assets are carried at the lower of carrying amount or fair value less estimated costs to sell. Revenue and expenses from operations and changes in the valuation allowance are included in other operating expenses.
Goodwill and Intangible Assets, Policy [Policy Text Block]	Intangible Assets and Goodwill The Company records as goodwill the excess of purchase price over the fair value of the identifiable net assets acquired. Goodwill is subject to at least an annual assessment for impairment by applying a fair value based test. The Company performs its annual analysis as of September 30 two first second The Company’s goodwill impairment analysis considered three first second third 100% no second third Each measure indicated that the Company’s fair value exceeded its book value. No December 31, 2017, 2016 2015. Acquired intangible assets (such as core deposit intangibles) are recognized separately from goodwill if the benefit of the asset can be sold, transferred, licensed, rented, or exchanged, and amortized over its useful life. The Company amortizes on a straight-line basis intangible assets arising from branch purchase transactions over their useful lives, determined by the Company to be ten twelve
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]	Stock-Based Compensation The Company’s 1999 March 9, 2009.
Pension and Other Postretirement Plans, Pensions, Policy [Policy Text Block]	Pension Plan The Company recognizes the overfunded or underfunded status of a defined benefit postretirement plan as an asset or liability in its statement of financial position and recognizes changes in that funded status in the year in which the changes occur through comprehensive income. The funded status of a benefit plan is measured as the difference between plan assets at fair value and the projected benefit obligation.
Income Tax, Policy [Policy Text Block]	Income Taxes Income tax accounting guidance results in two In February 2018, 2018 02, 2018 01 2017 $1,718. Deferred income tax expense results from changes in deferred tax assets and liabilities between periods. Deferred tax assets are recognized if it is more likely than not, not 50 not 50 not not not not The Company recognizes interest and penalties on income taxes as a component of income tax expense. The results for the year and the three December 31, 2017 December 22, 2017. January 1, 2018 21% 35%. fourth 2017 $1,560 $1,560 one
Trust Assets and Income [Policy Text Block]	Trust Assets and Income Assets (other than cash deposits) held by the Trust Department in a fiduciary or agency capacity for customers are not not
Earnings Per Share, Policy [Policy Text Block]	Earnings Per Common Share Basic earnings per common share represents income available to common stockholders divided by the weighted-average number of common shares outstanding during the period. Diluted earnings per common share reflects additional common shares that would have been outstanding if dilutive potential common shares had been issued, as well as any adjustment to income that would result from the assumed issuance. Potential common shares that may The following shows the weighted average number of shares used in computing earnings per common share and the effect on the weighted average number of shares of potentially dilutive common stock. 20 17 20 16 20 15 Average number of common shares outstanding 6,957,974 6,957,974 6,953,849 Effect of dilutive options --- --- 3,245 Average number of common shares outstanding used to calculate diluted earnings per common share 6,957,974 6,957,974 6,957,094 The computation of diluted net income per common share excludes shares for stock options that would be anti-dilutive. There were no 2017, 2016 2015. December 31, 2015, no
Commitments and Contingencies, Policy [Policy Text Block]	Loss Contingencies Loss contingencies, including claims and legal actions arising in the ordinary course of business are recorded as liabilities when the likelihood of loss is probable and reasonably estimated. Management does not
Advertising Costs, Policy [Policy Text Block]	Advertising The Company charges advertising costs to expenses as incurred. In 2017, $148, $122 $105 2016 2015,
Use of Estimates, Policy [Policy Text Block]	Use of Estimates In preparing consolidated financial statements in conformity with accounting principles generally accepted in the United States of America, management is required to make estimates and assumptions that affect the reported amounts of assets and liabilities as of the date of the consolidated balance sheet and reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Material estimates that are particularly susceptible to significant change in the near term relate to the determination of the allowance for loan losses, the valuation of foreclosed real estate, other-than-temporary impairments of securities, evaluation of impairment of goodwill, and pension obligations. Changing economic conditions, adverse economic prospects for borrowers, as well as regulatory agency action as a result of examination, could cause NBB to recognize additions to the allowance for loan losses and may
Reclassification, Policy [Policy Text Block]	Reclassifications Certain reclassifications have been made to prior period balances to conform to the current year provisions. Prior to 2017, 2017,
New Accounting Pronouncements, Policy [Policy Text Block]	Recent Accounting Pronouncements In May 2014, No. 2014 09, 606.” one January 1, 2018. first January 1, 2018 2014 09 not In January 2016, 2016 01, 825 10 2016 01, 1 2 3 4 December 15, 2017, not 2016 01 In February 2016, No. 2016 02, 842 2016 02, 1 2 606, December 15, 2018, not may not 2016 02 six one three During June 2016, No. 2016 13, 326 December 15, 2019. 2016 13 During August 2016, No. 2016 15, 230 December 15, 2017, not 2016 15 During January 2017, No. 2017 01, 805 805, three not not not not 1 2 December 15, 2017, No not 2017 01 During January 2017, No. 2017 04, 350 2 2 December 15, 2019. January 1, 2017. not 2017 04 During March 2017, 2017 07, 715 715 not December 15, 2017, not 2017 07 During March 2017, 2017 ‐ 08, 310 ‐ 20 December 15, 2018, 2017 ‐ 08 During May 2017, 2017 ‐ 09, 718 718. December 15, 2017. not 2017 ‐ 09 During August 2017, 2017 12, 815 December 15, 2018. 2017 ‐ 12 During February 2018, 2018 02, 220 December 15, 2018, December 31, 2017. 2017 $1,718.

Note 1 - Summary of Significa29

Note 1 - Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Weighted Average Number of Shares [Table Text Block]	20 17 20 16 20 15 Average number of common shares outstanding 6,957,974 6,957,974 6,953,849 Effect of dilutive options --- --- 3,245 Average number of common shares outstanding used to calculate diluted earnings per common share 6,957,974 6,957,974 6,957,094

Note 3 - Securities (Tables)

Note 3 - Securities (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Available-for-sale Securities [Table Text Block]	December 31, 2017 Available for sale: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Government agencies and corporations $ 312,604 $ 609 $ 5,494 $ 307,719 States and political subdivisions 16,853 100 119 16,834 Mortgage-backed securities 602 57 --- 659 Corporate debt securities 6,016 188 29 6,175 Total securities available for sale $ 336,075 $ 954 $ 5,642 $ 331,387 December 31, 2016 Available for sale: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses F air Value U.S. Government agencies and corporations $ 291,271 $ 492 $ 6,165 $ 285,598 States and political subdivisions 11,482 211 --- 11,693 Mortgage-backed securities 845 85 --- 930 Corporate debt securities 6,015 20 137 5,898 Other securities 189 --- 26 163 Total securities available for sale $ 309,802 $ 808 $ 6,328 $ 304,282
Investments Classified by Contractual Maturity Date [Table Text Block]	December 31, 20 1 7 Available for sale: Amortized Cost Fair Value Due in one year or less $ 33,405 $ 33,238 Due after one year through five years 192,388 189,005 Due after five years through ten years 72,001 70,509 Due after ten years 38,281 38,635 Total securities available for sale $ 336,075 $ 331,387 December 31, 20 1 7 Held to maturity: Amortized Cost Fair Value Due in one year or less $ 11,906 $ 12,088 Due after one year through five years 24,403 25,359 Due after five years through ten years 25,242 25,892 Due after ten years 65,613 66,774 Total securities held to maturity $ 127,164 $ 130,113
Held-to-maturity Securities [Table Text Block]	December 31, 20 1 7 Held to maturity: Amortized Cost Gross U nrealized Gains Gross Unrealized Losses Fair Value U.S. Government agencies and corporations $ 3,934 $ 167 $ --- $ 4,101 States and political subdivisions 122,039 2,929 173 124,795 Mortgage-backed securities 209 21 --- 230 Corporate debt securities 982 5 --- 987 Total securities held to maturity $ 127,164 $ 3,122 $ 173 $ 130,113 December 31, 20 1 6 Held to maturity: Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value U.S. Government agencies and corporations $ 3,934 $ 201 $ --- $ 4,135 States and political subdivisions 129,783 3,579 1,082 132,280 Mortgage-backed securities 265 30 --- 295 Corporate debt securities 975 7 --- 982 Total securities held to maturity $ 134,957 $ 3,817 $ 1,082 $ 137,692
Schedule of Temporary Impairment Losses, Investments [Table Text Block]	December 31, 2017 Less Than 12 Months 12 Months or More Fair Value Unrealized Loss Fair Value Unrealized Loss U. S. Government agencies and corporations $ 68,380 $ 871 $ 225,738 $ 4,623 State and political subdivisions 18,688 194 2,989 98 Corporate debt securities --- --- 948 29 Total temporarily impaired securities $ 87,068 $ 1,065 $ 229,675 $ 4,750 December 31, 2016 Less Than 12 Months 12 Months or More Fair Value Unrealized Loss Fair Value Unrealized Loss U. S. Government agencies and corporations $ 260,150 $ 6,161 $ 996 $ 4 State and political subdivisions 31,257 934 1,316 148 Corporate debt securities 3,888 137 --- --- Other securities --- --- 163 26 Total temporarily impaired securities $ 295,295 $ 7,232 $ 2,475 $ 178
Schedule of Realized Gain (Loss) on Called Securities [Table Text Block]	For the year ended December 31, 2017 Proceeds Book V alue Gross G ain Gross L oss N et Gain Available for sale $ 13,620 $ 13,614 $ 6 $ --- $ 6 Held to maturity 8,975 8,971 4 --- 4 For the year ended December 31, 201 6 Proceeds Book V alue Gross Gain Gross L oss N et Gain Available for sale $ 220,520 $ 220,334 $ 186 $ --- $ 186 Held to maturity 16,160 16,114 46 --- 46 For the year ended December 31, 201 5 Proceeds Book V alue Gross Gain Gross L oss N et Gain Available for sale $ 63,775 $ 63,742 $ 34 $ 1 $ 33 Held to maturity 7,605 7,605 --- --- ---

Note 5 - Allowance for Loan L31

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Allowance for Credit Losses on Financing Receivables [Table Text Block]	Activity in th e Allowance for Loan Losses by S egment for the year ended December 31 , 201 7 Real Estate Construction Consumer Real Estate Commercial Real Estate Commercial Non Real Estate Public Sector and IDA Consumer Non Real Estate Unallocated Total Balance , December 31, 2016 $ 438 $ 1,830 $ 3,738 $ 1,063 $ 330 $ 644 $ 257 $ 8,300 Charge-offs --- (146 ) (139 ) (82 ) --- (452 ) --- (819 ) Recoveries --- 1 131 23 --- 132 --- 287 Provision for loan losses (101 ) 342 (686 ) 68 89 383 62 157 Balance, December 31, 201 7 $ 337 $ 2,027 $ 3,044 $ 1,072 $ 419 $ 707 $ 319 $ 7,925 Activity in th e Allowance for Loan Losses by S egment for the year ended December 31 , 201 6 Real Estate Construction Consumer Real Estate Commercial Real Estate Commercial Non Real Estate Public Sector and IDA Consumer Non Real Estate Unallocated Total Balance , December 31, 2015 $ 576 $ 1,866 $ 4,109 $ 655 $ 436 $ 627 $ 28 $ 8,297 Charge-offs (29 ) (133 ) (488 ) (883 ) --- (273 ) --- (1,806 ) Recoveries --- 2 83 10 --- 64 --- 159 Provision for loan losses (109 ) 95 34 (1,281 ) (106 ) 226 229 1,650 Balance, December 31, 201 6 $ 438 $ 1,830 $ 3,738 $ 1,063 $ 330 $ 644 $ 257 $ 8,300 Activity in th e Allowance for Loan Losses by S egment for the year ended December 31 , 201 5 Real Estate Construction Consumer Real Estate Commercial Real Estate Commercial Non Real Estate Public Sector and IDA Consumer Non Real Estate Unallocated Total Balance , December 31, 2014 $ 612 $ 1,662 $ 3,537 $ 1,475 $ 327 $ 602 $ 48 $ 8,263 Charge-offs --- (205 ) (1,114 ) (490 ) --- (311 ) --- (2,120 ) Recoveries --- 2 49 1 --- 93 --- 145 Provision for loan losses (36 ) 407 1,637 (331 ) 109 243 (20 ) 2,009 Balance, December 31, 201 5 $ 576 $ 1,866 $ 4,109 $ 655 $ 436 $ 627 $ 28 $ 8,297
Schedule of Credit Losses Related to Financing Receivables, Current and Noncurrent [Table Text Block]	Allowance for Loan Losses by Segment and Evaluation Method as of December 31, 201 7 Real Estate Construction Consumer Real Estate Commercial Real Estate Commercial Non Real Estate Public Sector and IDA Consumer Non Real Estate Unallocated Total Individually evaluated for impairment $ --- $ 16 $ --- $ 160 $ --- $ 1 $ --- $ 177 Collectively evaluated for impairment 337 2,011 3,044 912 419 706 319 7,748 Total $ 337 $ 2,027 $ 3,044 $ 1,072 $ 419 $ 707 $ 319 $ 7,925 Loans by Segment and Evaluation Method as of December 31, 201 7 Real Estate Construction Consumer Real Estate Commercial Real Estate Commercial Non Real Estate Public Sector and IDA Consumer Non Real Estate Unallocated Total Individually evaluated for impairment $ 2,882 $ 1,267 $ 6,516 $ 1,229 $ --- $ 30 $ --- $ 11,924 Collectively evaluated for impairment 31,812 165,698 333,898 39,289 51,443 34,618 --- 656,758 Total $ 34,694 $ 166,965 $ 340,414 $ 40,518 $ 51,443 $ 34,648 $ --- $ 668,682 Allowance for Loan Losses by Segment and Evaluation Method as of December 31, 201 6 Real Estate Construction Consumer Real Estate Commercial Real Estate Commercial Non Real Estate Public Sector and IDA Consumer Non Real Estate Unallocated Total Individually evaluated for impairment $ --- $ 25 $ 1 $ --- $ --- $ --- $ --- $ 26 Collectively evaluated for impairment 438 1,805 3,737 1,063 330 644 257 8,274 Total $ 438 $ 1,830 $ 3,738 $ 1,063 $ 330 $ 644 $ 257 $ 8,300 Loans by Segment and Evaluation Method as of December 31, 201 6 Real Estate Construction Consumer Real Estate Commercial Real Estate Commercial Non Real Estate Public Sector and IDA Consumer Non Real Estate Unallocated Total Individually evaluated for impairment $ 270 $ 877 $ 7,782 $ 241 $ --- $ 3 $ --- $ 9,173 Collectively evaluated for impairment 36,075 156,841 328,675 38,783 45,474 33,525 --- 639,373 Total $ 36,345 $ 157,718 $ 336,457 $ 39,024 $ 45,474 $ 33,528 $ --- $ 648,546
Schedule of Ratios for Allowance for Loan Losses [Table Text Block]	December 31, 201 7 20 16 Ratio of allowance for loan losses to the end of period loans, net of unearned income and deferred fees and costs 1.19 % 1.28 % Ratio of net charge-offs to average loans, net of unearned income and deferred fees and costs 0.08 % 0.26 %
Schedule of Nonperforming Assets [Table Text Block]	December 31, 201 7 20 16 Nonperforming assets: Nonaccrual loans $ 6 $ 1,168 Restructured loans in nonaccrual 2,763 4,687 Total nonperforming loans 2,769 5,855 Other real estate owned, net 2,817 3,156 Total nonperforming assets $ 5,586 $ 9,011 Ratio of nonperforming assets to loans, net of unearned income and deferred fees and costs, plus other real estate owned 0.83 % 1.38 % Ratio of allowance for loan losses to nonperforming loans ( 1 ) 286.20 % 141.76 %
Summary of Past Due 90 Days Loans or More and Impaired Loans [Table Text Block]	December 31, 201 7 20 16 Loans past due 90 days or more and still accruing $ 51 $ 63 Ratio of loans past due 90 days or more and still accruing to loans, net of unearned income and deferred fees and costs 0.01 % 0.01 % Accruing restructured loans $ 5,134 $ 3,769 Impaired loans : Impaired loans with no valuation allowance $ 10,444 $ 8,269 Impaired loans with a valuation allowance 1,480 904 Total impaired loans $ 11,924 $ 9,173 Valuation allowance $ (177 ) $ (26 ) Impaired loans, net of allowance $ 11,747 $ 9,147 Average recorded investment in impaired loans (1) $ 13,344 $ 11,585 Income recognized on impaired loans , after designation as impaired $ 528 $ 553 Amount of income recognized on a cash basis $ --- $ ---
Impaired Financing Receivables [Table Text Block]	Impaired Loans as of December 31, 201 7 Principal Balance (A) Total Recorded Investment (1) Recorded Investment (1) Recorded Investment (1) Related Allowance Real Estate Construction (2) Construction other $ 2,882 $ 2,882 $ 2,882 $ --- $ --- Co nsumer Real Estate (2) Residential closed-end first liens 807 768 590 178 10 Residential closed-end junior liens 174 174 --- 174 6 Investor-owned residential real estate 347 325 325 --- --- Commercial Real Estate (2) Multifamily real estate 303 303 303 --- --- Commercial real estate, owner occupied 3,619 3,611 3,611 --- --- Commercial real estate, other 2,921 2,602 2,602 --- --- Commercial Non Real Estate (2) Commercial and Industrial 1,236 1,229 126 1,103 160 Consumer Non Real Estate (2) Automobile 30 30 5 25 1 Total $ 12,319 $ 11,924 $ 10,444 $ 1,480 $ 177 Impaired Loans as of December 31, 201 6 Principal Balance (A) Total Recorded Investment (1) Recorded Investment (1) Recorded Investment (1) Related Allowance Real Estate Construction (2) Construction 1-4 family residential $ 280 $ 270 $ 270 $ --- $ --- Co nsumer Real Estate (2) Residential closed-end first liens 648 609 267 342 14 Residential closed-end junior liens 195 195 --- 195 7 Investor-owned residential real estate 73 73 --- 73 4 Commercial Real Estate (2) Multifamily real estate 1,364 1,091 1,091 --- --- Commercial real estate, owner occupied 4,005 3,957 3,663 294 1 Commercial real estate, other 2,997 2,734 2,734 --- --- Commercial Non Real Estate (2) Commercial and Industrial 255 241 241 --- --- Consumer Non Real Estate (2) Automobile 3 3 3 --- --- Total $ 9,820 $ 9,173 $ 8,269 $ 904 $ 26
Impaired Financing Receivable Average Investment And Interest Income [Table Text Block]	Average Investment and Interest Income for Impaired Loans For the Year Ended December 31, 201 7 Average Recorded Investment (1) Interest Income Recognized Real Estate Construction (2) Construction other $ 3,298 $ 177 Consumer Real Estate (2) Residential closed-end first liens 781 57 Residential closed-end junior liens 185 11 Investor-owned residential real estate 329 1 Commercial Real Estate (2) Multifamily real estate 748 16 Commercial real estate, owner occupied 4,047 200 Commercial real estate, other 2,638 --- Commercial Non Real Estate (2) Commercial and Industrial 1,282 64 Consumer Non Real Estate (2) Automobile 36 2 Total $ 13,344 $ 528 Average Investment and Interest Income for Impaired Loans For the Year Ended December 31, 201 6 Average Recorded Investment (1) Interest Income Recognized Real Estate Construction (2) Construction 1-4 family residential $ 462 $ 10 Consumer Real Estate (2) Residential closed-end first liens 642 38 Residential closed-end junior liens 207 13 Investor-owned residential real estate 74 4 Commercial Real Estate (2) Multifamily real estate 1,366 12 Commercial real estate, owner occupied 4,342 206 Commercial real estate, other 3,947 263 Commercial Non Real Estate (2) Commercial and Industrial 541 7 Consumer Non Real Estate (2) Automobile 4 --- Total $ 11,585 $ 553 Average Investment and Interest Income for Impaired Loans For the Year Ended December 31, 201 5 Average Recorded Investment (1) Interest Income Recognized Real Estate Construction (2) Construction 1-4 family residential $ 612 $ 23 Consumer Real Estate (2) Residential closed-end first liens 681 43 Residential closed-end junior liens 228 15 Investor-owned residential real estate 76 5 Commercial Real Estate (2) Multifamily real estate 2,581 84 Commercial real estate, owner occupied 6,141 251 Commercial real estate, other 5,888 308 Commercial Non Real Estate (2) Commercial and Industrial 1,090 40 Total $ 17,297 $ 769
Past Due Financing Receivables [Table Text Block]	December 31, 201 7 3 0 – 89 Days Past Due 90 or M ore Days Past Due 90 or More Days Past Due and Still Accruing Nonaccruals (I ncluding Impaired Nonaccruals) Real Estate Construction Construction, residential $ --- $ --- $ --- $ --- Construction, other --- --- --- --- Consumer Real Estate Equity lines --- --- --- --- Residential closed-end first liens 637 16 11 145 Residential closed-end junior liens 188 --- --- --- Investor-owned residential real estate 66 --- --- 6 Commercial Real Estate Multifamily real estate 303 --- --- --- Commercial real estate, owner occupied 402 --- --- --- Commercial real estate, other --- 2,602 --- 2,602 Commercial Non Real Estate Commercial and Industrial 131 --- --- 15 Public Sector and IDA Public sector and IDA --- --- --- --- Consumer Non Real Estate Credit cards 7 12 12 --- Automobile 375 22 22 1 Other consumer loans 154 6 6 --- Total $ 2,263 $ 2,658 $ 51 $ 2,769 December 31, 201 6 3 0 – 89 Days Past Due 90 or M ore Days Past Due 90 or More Days Past Due and Still Accruing Nonaccruals (I ncluding Impaired Nonaccruals) Real Estate Construction Construction, residential $ --- $ --- $ --- $ 270 Construction, other 25 --- --- --- Consumer Real Estate Equity lines 10 --- --- --- Residential closed-end first liens 1,498 6 6 --- Residential closed-end junior liens 114 36 36 --- Investor-owned residential real estate 56 234 --- 253 Commercial Real Estate Multifamily real estate 132 1,091 --- 1,091 Commercial real estate, owner occupied 339 202 --- 1,183 Commercial real estate, other --- 80 --- 2,814 Commercial Non Real Estate Commercial and Industrial 6 218 --- 241 Public Sector and IDA Public sector and IDA --- --- --- --- Consumer Non Real Estate Credit cards 8 5 5 --- Automobile 234 12 12 3 Other consumer loans 131 4 4 --- Total $ 2,553 $ 1,888 $ 63 $ 5,855
Financing Receivable Credit Quality Indicators [Table Text Block]	December 31, 201 7 Pass Special Mention (Excluding Impaired) Classified (Excluding Impaired) Real Estate Construction Construction, 1-4 family residential $ 10,396 $ --- $ --- Construction, other 21,416 --- --- Consumer Real Estate Equity lines 16,673 39 --- Closed-end first liens 85,975 2,400 355 Closed-end junior liens 4,483 29 12 Investor-owned residential real estate 55,410 66 256 Commercial Real Estate Multifamily residential real estate 95,894 127 --- Commercial real estate owner-occupied 130,256 246 763 Commercial real estate, other 106,612 --- -- Commercial Non Real Estate Commercial and Industrial 38,904 220 165 Public Sector and IDA States and political subdivisions 51,443 --- --- Consumer Non Real Estate Credit cards 5,493 --- --- Automobile 16,059 218 116 Other consumer 12,692 16 24 Total $ 651,706 $ 3,361 $ 1,691 December 31, 201 6 Pass Special Mention (Excluding Impaired) Classified (Excluding Impaired) Real Estate Construction Construction, 1-4 family residential $ 11,635 $ 3,648 $ --- Construction, other 20,972 --- --- Consumer Real Estate Equity lines 17,034 82 --- Closed-end first liens 83,658 1,267 580 Closed-end junior liens 4,861 15 151 Investor-owned residential real estate 48,277 333 583 Commercial Real Estate Multifamily residential real estate 99,002 1,733 --- Commercial real estate owner-occupied 120,170 1,188 1,425 Commercial real estate, other 103,534 1,543 80 Commercial Non Real Estate Commercial and Industrial 35,521 3,229 33 Public Sector and IDA States and political subdivisions 45,474 --- --- Consumer Non Real Estate Credit cards 5,978 --- --- Automobile 14,457 25 192 Other consumer 12,229 636 8 Total $ 622,802 $ 13,519 $ 3,052
Troubled Debt Restructurings on Financing Receivables [Table Text Block]	Restructurings that occurred during the year ended December 31, 201 7 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (1) Consumer Real Estate Closed-end first lien 1 $ 8 $ 8 Commercial Real Estate Commercial real estate, other 1 132 132 Commercial Non Real Estate Commercial and industrial 4 1,221 1,221 Co nsumer N on R eal E state Automobile 4 26 26 Total 10 $ 1,387 $ 1,387 Restructurings that occurred during the year ended December 31, 201 6 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (1) Commercial Real Estate Commercial real estate, other 2 $ 3,008 $ 3,008 Commercial Non Real Estate Commercial and industrial 1 29 30 Consumer N on R eal E state Automobile 1 5 5 Total 4 $ 3,042 $ 3,043 Restructurings that occurred during the year ended December 31, 201 5 Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (1) Real Estate Construction Construction, 1-4 family residential 2 $ 718 $ 718 Commercial Real Estate Commercial real estate owner-occupied 3 2,710 2,623 Commercial Non Real Estate Commercial and industrial 1 200 200 Total 6 $ 3,628 $ 3,541

Note 6 - Premises and Equipme32

Note 6 - Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Property, Plant and Equipment [Table Text Block]	December 31, 20 17 20 16 Premises $ 12,434 $ 12,554 Furniture and equipment 5,238 5,052 Premises and equipment $ 17,672 $ 17,606 Accumulated depreciation (9,451 ) (8,753 ) Premises and equipment, net $ 8,221 $ 8,853

Note 7 - Deposits (Tables)

Note 7 - Deposits (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Scheduled Maturities of Time Deposits [Table Text Block]	201 8 76,378 201 9 30,124 2020 2,224 2021 2,931 202 2 3,227 Thereafter --- Total time deposits $ 114,884

Note 8 - Employee Benefit Pla34

Note 8 - Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Defined Benefit Plans Disclosures [Table Text Block]	December 31 , 201 7 201 6 201 5 Change in benefit obligatio n Projected benefit obligation at beginning of year $ 21,059 $ 20,427 $ 19,324 Service cost 692 694 620 Interest cost 743 757 669 Actuarial loss 1,417 198 798 Benefits paid (419 ) (1,017 ) (984 ) Projected benefit obligation at end of year $ 23,492 $ 21,059 $ 20,427 Change in plan asset s Fair value of plan assets at beginning of year $ 17,038 $ 16,131 $ 17,130 Actual return on plan assets 2,302 1,113 (155 ) Employer contribution 4,507 811 140 Benefits paid (419 ) (1,017 ) (984 ) Fair value of plan assets at end of year $ 23,428 $ 17,038 $ 16,131 Funded status at the end of the yea r $ (64 ) $ (4,021 ) $ (4,296 ) Amounts recognized in the Consolidated Balance Shee t Deferred tax asset $ 13 $ 1,407 $ 1,504 Other liabilities (64 ) (4,021 ) (4,296 ) Total amounts recognized in the Consolidated Balance Sheet $ (51 ) $ (2,614 ) $ (2,792 ) Amounts recognized in accumulated other comprehensive (loss), ne t Net gain (loss) $ (7,923 ) $ (8,250 ) $ (8,627 ) Prior service cost 340 449 559 Deferred tax asset 1,592 2,730 2,798 Amount recognized $ (5,991 ) $ (5,071 ) $ (5,270 ) Accrued/Prepaid benefit cost, ne t Benefit obligation $ (23,492 ) $ (21,059 ) $ (20,427 ) Fair value of assets 23,428 17,038 16,131 Unrecognized net actuarial loss 7,923 8,250 8,627 Unrecognized prior service cost (340 ) (449 ) (559 ) Deferred tax liability (1,579 ) (1,323 ) (1,294 ) Prepaid benefit cost included in other assets $ 5,940 $ 2,457 $ 2,478 Components of net periodic benefit cos t Service cost $ 692 $ 694 $ 620 Interest cost 743 757 669 Expected return on plan assets (1,097 ) (1,110 ) (1,166 ) Amortization of prior service cost (110 ) (110 ) (110 ) Recognized net actuarial loss 540 572 414 Net periodic benefit cost $ 768 $ 803 $ 427 Other changes in plan assets and benefit obligations recognized in other comprehensive los s Net (gain) loss $ (328 ) $ (377 ) $ 1,705 Amortization of prior service cost 110 110 110 Deferred income tax expense (benefit) 46 93 (635 ) Total recognized $ (172 ) $ (174 ) $ 1,180 Total recognized in net periodic benefit cost and other comprehensive loss $ 550 $ 536 $ 2,242 Weighted average assumptions at end of the yea r Discount rate used for net periodic pension cost 4.00 % 4.00 % 3.75 % Discount rate used for disclosure 3.50 % 4.00 % 4.00 % Expected return on plan assets 7.50 % 7.50 % 7.50 % Rate of compensation increase 3.00 % 3.00 % 3.00 %
Schedule of Allocation of Plan Assets [Table Text Block]	Fair Value Measurements at December 31, 20 1 7 Asset Category Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Cash $ 4,454 $ 4,454 $ --- $ --- Equity securities: U. S. companies 9,892 9,892 --- --- International companies 106 106 --- --- Equities mutual funds (1) 1,962 1,962 --- --- U. S. government agencies and corporations 51 --- 51 --- State and political subdivisions 231 --- 231 --- Corporate bonds – investment grade (2) 6,732 --- 6,732 --- Total pension plan assets $ 23,428 $ 16,414 $ 7,014 $ --- Fair Value Measurements at December 31, 20 1 6 Asset Category Total Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Cash $ 207 $ 207 $ --- $ --- Equity securities: U. S. companies 9,195 9,195 --- --- International companies 116 116 --- --- Equities mutual funds (1) 966 966 --- --- U. S. government agencies and corporations 53 --- 53 --- State and political subdivisions 230 --- 230 --- Corporate bonds – investment grade (2) 6,271 --- 6,271 --- Total pension plan assets $ 17,038 $ 10,484 $ 6,554 $ ---
Schedule of Expected Benefit Payments [Table Text Block]	201 8 $ 4,229 201 9 $ 1,060 2020 $ 1,630 202 1 $ 738 20 22 $ 1,277 2023 - 2027 $ 6,546

Note 10 - Income Taxes (Tables)

Note 10 - Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	Years ended December 31, 20 17 20 16 20 15 Current $ 2,943 $ 3,934 $ 4,730 Deferred expense 1,790 18 10 Deferred tax adjustment for enacted change in tax rate 1,560 --- --- Total income tax expense $ 6,293 $ 3,952 $ 4,740
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	Years ended December 31, 20 17 20 16 20 15 Computed “expected” income tax expense $ 7,135 $ 6,613 $ 7,201 Tax impact of enacted change in tax rate 1,560 --- --- Tax-exempt interest income (2,144 ) (2,234 ) (2,381 ) Nondeductible interest expense 89 92 101 Other, net (347 ) (519 ) (181 ) Reported income tax expense $ 6,293 $ 3,952 $ 4,740
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	December 31, 20 17 20 16 Deferred tax assets: Allowance for loan losses and unearned fee income $ 1,773 $ 3,347 Valuation allowance on other real estate owned 156 237 Defined benefit plan 1,592 2,730 Deferred compensation and other liabilities 863 1,336 Discount accretion of securities --- 15 Net unrealized loss on securities available for sale 984 1,932 Total deferred tax assets $ 5,368 $ 9,597 Deferred tax liabilities: Fixed assets $ (388 ) $ (620 ) Deposit intangibles (1,059 ) (1,573 ) Defined benefit plan, prepaid portion (1,579 ) (1,345 ) Discount accretion of securities (2 ) Total deferred tax liabilities (3,028 ) (3,538 ) Net deferred tax asset s $ 2,340 $ 6,059

Note 12 - Minimum Regulatory 36

Note 12 - Minimum Regulatory Capital Requirement (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]	Actual Minimum Capital (1) Minimum To Be Well Amount Ratio Amount Ratio Amount Ratio December 31, 201 7 Total capital (to risk weighted assets) NBI consolidated $ 198,468 24.542 % $ 74,804 9.250 % N/A N/A NBB 195,903 24.316 % 74,523 9.250 % $ 80,566 10.000 % Tier 1 capital (to risk weighted assets) NBI consolidated $ 190,543 23.562 % $ 58,630 7.250 % N/A N/A NBB 187,978 23.332 % 58,410 7.250 % $ 64,452 8.000 % Common Equity Tier 1 capital (to risk weighted assets) NBI consolidated $ 190,543 23.562 % $ 46,500 5.750 % N/A N/A NBB 187,978 23.332 % 46,325 5.750 % $ 52,368 6.500 % Tier 1 capital (to average assets) NBI consolidated $ 190,543 15.424 % $ 49,413 4.000 % N/A N/A NBB 187,978 15.254 % 49,293 4.000 % $ 61,616 5.000 % Actual Minimum Capital Minimum To Be Well Amount Ratio Amount Ratio Amount Ratio December 31, 201 6 Total capital (to risk weighted assets) NBI consolidated $ 191,006 26.575 % $ 57,499 8.625 % N/A N/A NBB 188,095 26.296 % 57,224 8.625 % $ 71,529 10.000 % Tier 1 capital (to risk weighted assets) NBI consolidated $ 182,706 25.420 % $ 43,124 6.625 % N/A N/A NBB 179,795 25.136 % 42,918 6.625 % $ 57,224 8.000 % Common Equity Tier 1 capital (to risk weighted assets) NBI consolidated $ 182,706 25.420 % $ 32,343 5.125 % N/A N/A NBB 179,795 25.136 % 32,188 5.125 % $ 46,494 6.500 % Tier 1 capital (to average assets) NBI consolidated $ 182,706 15.121 % $ 48,333 4.000 % N/A N/A NBB 179,795 14.964 % 48,060 4.000 % $ 60,075 5.000 %

Note 13 - Condensed Financial37

Note 13 - Condensed Financial Statements of Parent Company (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Condensed Balance Sheet [Table Text Block]	Condensed Balance Sheets December 31, 20 17 20 16 Assets Cash due from subsidiaries $ 46 $ 74 Interest-bearing deposits 503 1,310 Securities available for sale , at fair value --- 163 Investments in subsidiaries, at equity 184,336 177,150 Refundable income taxes 168 22 Other assets 820 561 Total assets $ 185,873 $ 179,280 Liabilities a nd Stockholders’ Equity Other liabilities $ 977 $ 1,017 Stockholders ’ equity 184,896 178,263 Total liabilities and stockholders ’ equity $ 185,873 $ 179,280
Condensed Income Statement [Table Text Block]	Condensed Statements of Income Years Ended December 31, 20 17 20 16 20 15 Income Dividends from subsidiaries $ 8,141 $ 9,421 $ 7,930 Interest on securities – taxable --- 2 3 Realized securities gains, net 4 --- --- Other income 1,018 987 1,208 Total income 9,163 10,410 9,141 Expenses Other expenses 1,986 1,992 2,051 Income before income tax benefit and equity in undistributed net income of subsidiaries 7,177 8,418 7,090 Applicable income tax benefit 383 628 210 Income before equity in undistributed net income of subsidiaries 7,560 9,046 7,300 Equity in undistributed net income of subsidiaries 6,532 5,896 8,533 Net income $ 14,092 $ 14,942 $ 15,833
Condensed Cash Flow Statement [Table Text Block]	Condensed Statements of Cash Flows Years ended December 31, 20 17 20 16 20 15 Cash Flows f rom Operating Expenses Net income $ 14,092 $ 14,942 $ 15,833 Adjustments to reconcile net income to net cash provided by operating activities: Equity in undistributed net income of subsidiaries (6,532 ) (5,896 ) (8,533 ) Amortization of premiums and accretion of discounts, net --- 1 1 Depreciation expense --- --- 3 Gain on sale of securities (4 ) --- --- Loss on disposal of fixed assets --- --- 2 Net change in refundable income taxes due from subsidiaries (146 ) (223 ) 106 Net change in other assets (156 ) 219 (81 ) Net change in other liabilities (40 ) (227 ) 128 Net cash provided by operating activities 7,214 8,816 7,459 Cash Flows f rom Investing Activities Net change in interest-bearing deposits 807 (1,140 ) 307 Maturities, sales and calls of securities available for sale 192 --- --- Maturities and calls of securities held to maturity --- 450 --- Capital distribution to subsidiary (100 ) --- --- Net cash provided by (used in) investing activities 899 (690 ) 307 Cash Flows f rom Financing Activities Cash dividends paid (8,141 ) (8,071 ) (7,930 ) Exercise of stock options --- --- 173 Net cash used in financing activities (8,141 ) (8,071 ) (7,757 ) Net change in cash (28 ) 55 9 Cash due from subsidiaries at beginning of year 74 19 10 Cash due from subsidiaries at end of year $ 46 $ 74 $ 19

Note 14 - Financial Instrumen38

Note 14 - Financial Instruments With Off-balance Sheet Risk (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block]	December 31, 20 17 20 16 Financial instruments whose contract amounts represent credit risk: Commitments to extend credit $ 161,222 $ 130,252 Standby letters of credit 16,351 20,499 Mortgage loans sold with potential recourse 14,130 17,526

Note 16 - Fair Value Measurem39

Note 16 - Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]	Fair Value Measurements at December 31, 20 17 Using Description Balance as of December 31, Quoted Prices in Active Significant Other Significant Unobservable Inputs U.S. Government agencies and corporations $ 307,719 $ --- $ 307,719 $ --- States and political subdivisions 16,834 --- 16,834 --- Mortgage-backed securities 659 --- 659 --- Corporate debt securities 6,175 --- 6,175 --- Total securities available for sale $ 331,387 $ --- $ 331,387 $ --- Fair Value Measurements at December 31, 20 16 Using Description Balance as of December 31, Quoted Prices in Active Significant Other Significant Unobservable Inputs U.S. Government agencies and corporations $ 285,598 $ --- $ 285,598 $ --- States and political subdivisions 11,693 --- 11,693 --- Mortgage-backed securities 930 --- 930 --- Corporate debt securities 5,898 --- 5,898 --- Other securities 163 --- 163 --- Total securities available for sale $ 304,282 $ --- $ 304,282 $ ---
Fair Value Measurements, Nonrecurring [Table Text Block]	Carrying value Date Description Balance Quoted Prices in Active Significant Other Significant Unobservable Inputs Assets: December 31, 201 7 Impaired loans net of valuation allowance $ 1,303 $ --- $ --- $ 1,303 December 31, 201 6 Impaired loans net of valuation allowance 878 --- --- 878 Carrying Value Date Description Balance Quoted Prices in Active Significant Other Significant Unobservable Inputs Assets: December 31, 201 7 Other real estate owned net of valuation allowance $ 2,817 $ --- $ --- $ 2,817 December 31, 201 6 Other real estate owned net of valuation allowance 3,156 --- --- 3,156
Fair Value Inputs, Assets, Quantitative Information [Table Text Block]	Impaired Loans Valuation Technique Unobservable Input Range (Weighted Average) December 31, 2017 Present value of cash flows Discount rate 5.50% - 13.25% (5.92%) December 31, 2016 Present value of cash flows Discount rate 6.75% - 8.00% (7.35%) Valuation Technique Unobservable Input Rang (Weighted Average) Other real estate owned Discounted appraised value Selling cost 2.00% (1) – 6.01% (4.72%) Other real estate owned Discounted appraised value Discount for lack of marketability and age of appraisal 1.68% – 68.33% (11.07%) Valuation Technique Unobservable Input Range (Weighted Average) Other real estate owned Discounted appraised value Selling cost 2.91% (1) – 8.60% (6.48%) Other real estate owned Discounted appraised value Discount for lack of marketability and age of appraisal 0% – 53.46% (13.66%)
Fair Value, by Balance Sheet Grouping [Table Text Block]	December 31, 2017 Estimated Fair Value Carrying Amount Level 1 Level 2 Level 3 Financial assets: Cash and due from banks $ 12,926 $ 12,926 $ --- $ --- Interest-bearing deposits 51,233 51,233 --- --- Securities 458,551 --- 461,500 --- Restricted securities 1,200 --- 1,200 --- Mortgage loans held for sale 260 --- 260 --- Loans, net 660,144 --- --- 656,399 Accrued interest receivable 5,297 --- 5,297 --- Bank-owned life insurance 33,756 --- 33,756 --- Financial liabilities: Deposits $ 1,059,734 $ --- $ 944,850 $ 113,053 Accrued interest payable 62 --- 62 --- December 31, 201 6 Estimated Fair Value Carrying Amount Level 1 Level 2 Level 3 Financial assets: Cash and due from banks $ 13,974 $ 13,974 $ --- $ --- Interest-bearing deposits 80,268 80,268 --- --- Securities 439,239 --- 441,974 --- Restricted securities 1,170 --- 1,170 --- Mortgage loans held for sale 478 --- 478 --- Loans, net 639,452 --- --- 658,386 Accrued interest receivable 5,260 --- 5,260 --- Bank-owned life insurance 22,998 --- 22,998 --- Financial liabilities: Deposits $ 1,043,442 $ --- $ 912,828 $ 128,690 Accrued interest payable 55 --- 55 ---

Note 17 - Components of Accum40

Note 17 - Components of Accumulated Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	Net Unrealized Gain (Loss) on Securities Adjustments Related to Pension Benefits Accumulated Other Comprehensive Income (Loss) Balance at December 31, 201 4 $ (1,582 ) $ (4,090 ) $ (5,672 ) Unrealized holding loss on available for sale securities net of tax of ($571) (1,064 ) --- (1,064 ) Reclassification adjustment, net of tax of ($1 2) (21 ) --- (21 ) Net pension loss arising during the period, net of tax of ($597) --- (1,108 ) (1,108 ) Less amortization of prior service cost included in net periodic pensi on cost, net of tax of ($38) --- (72 ) (72 ) Balance at December 31, 201 5 $ (2,667 ) $ (5,270 ) $ (7,937 ) Unrealized holding loss on available for sa le securities net of tax of ($431) (800 ) --- (800 ) Reclassification adjustment, net of tax of ($65) (121 ) --- (121 ) Net pension gain arising during the period, net of tax of $132 --- 271 271 Less amortization of prior service cost included in net periodic pension cost, net of tax of ($38) --- (72 ) (72 ) Balance at December 31, 201 6 $ (3,588 ) $ (5,071 ) $ (8,659 ) Unrealized holding gain on available for sale securities net of tax of $296 546 --- 546 Reclassification a djustment, net of tax of ($4) (6 ) --- (6 ) Net pension gain arising during the period, net of tax of $115 --- 213 213 Less amortization of prior service cost included in net periodic pension cost, net of tax of ($38) --- (71 ) (71 ) Reclassification of stranded tax effects from change in tax rate (656 ) (1,062 ) (1,718 ) Balance at December 31, 201 7 $ (3,704 ) $ (5,991 ) $ (9,695 )
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]	December 31, 201 7 201 6 201 5 Component of Accumulated Other Comprehensive Income (Loss) Reclassification out of unrealized gains and losses on available-for-sale securities: Realized securities gain, net $ (10 ) $ (186 ) $ (33 ) Income tax benefit (4 ) (65 ) (12 ) Realized gain on available-for-sale securities, net of tax, reclassified out of accumulated other comprehensive income (loss) $ (6 ) $ (121 ) $ (21 ) Amortization of defined benefit pension items: Pr ior service costs (1) $ (109 ) $ (110 ) $ (110 ) Income tax benefit (38 ) (38 ) (38 ) Amortization of defined benefit pension items , net of tax, reclassified out of accumulated other comprehensive income (loss) $ (71 ) $ (72 ) $ (72 )

Note 18 - Intangible Assets a41

Note 18 - Intangible Assets and Goodwill (Tables)	12 Months Ended
	Dec. 31, 2017
Notes Tables
Schedule of Intangible Assets and Goodwill [Table Text Block]	Gross Carrying Value Accumulated Amortization Net Carrying Value December 31, 20 17 Amortizable core deposit intangibles $ 16,257 $ 16,207 $ 50 Unamortizable goodwill 5,848 --- 5,848 Intangible assets and goodwill $ 22,105 $ 16,207 $ 5,898 December 31, 20 16 Amortizable core deposit intangibles $ 16,257 $ 16,139 $ 118 Unamortizable goodwill 5,848 --- 5,848 Intangible assets and goodwill $ 22,105 $ 16,139 $ 5,966
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	201 8 50 Thereafter --- Total $ 50

Note 1 - Summary of Significa42

Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($) shares in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Number of Days of Delinquent Loans Nonaccrual of Interest			90 days
Minimum Number of Days of Discontinued Loan Payments for Modified Loan to be Placed on Nonaccrual			90 days
Number of Days Past Due			30 days
Threshold for Designation to Impaired Status			$ 250,000
Minimum Number of Days Consumer Loans are Past Due for Losses to be Charged Off			120 days
Maximum Number of Days Consumer Loans are Past Due for Losses to be Charged Off			180 days
Number of Days Loans Secured by Residential Or Commercial Real Estate Are Past Due for Losses to Be Carged Off			180 days
Period of Time Between Issuance of Loan Commitment and Closing and Sale of Loans Lower Range			30 days
Period of Time Between Issuance of Loan Commitments and Closing and Sale of Loans Upper Range			60 days
Noncontrolling Interest, Ownership Percentage by Parent	100.00%		100.00%
Reclassification of Stranded Tax Effects from Change in Tax Rate
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			35.00%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	$ 1,560,000		$ 1,560,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			0	0	0
Advertising Expense			$ 148,000	$ 122,000	$ 105,000
Goodwill, Impairment Loss			0	$ 0	$ 0
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%
ASU 2018-02 [Member]
Reclassification of Stranded Tax Effects from Change in Tax Rate			$ 1,718,000
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life			10 years
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life			12 years
Building [Member]
Property, Plant and Equipment, Useful Life			40 years
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life			3 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life			10 years
Computer Equipment [Member]
Property, Plant and Equipment, Useful Life			3 years

Note 1 - Summary of Significa43

Note 1 - Summary of Significant Accounting Policies - Weighted Average Number of Shares (Details) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Average number of common shares outstanding (in shares)	6,957,974	6,957,974	6,953,849
Effect of dilutive options (in shares)	0		3,245
Average number of common shares outstanding used to calculate diluted earnings per common share (in shares)	6,957,974	6,957,974	6,957,094

Note 3 - Securities (Details Te

Note 3 - Securities (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Number of Temporarily Impaired Securities	343
Available-for-sale and Held to Maturity Securities Continuous Unrealized Loss Position Fair Value	$ 316,743
Continuous Unrealized Loss Position Aggregate Losses	$ 5,815
Number of Temporarily Impaired Securities Greater than Twelve Months	236
Continuous Unrealized Loss Position Twelve Months or Longer Fair Value	$ 229,675	$ 2,475
Continuous Unrealized Loss Position 12 Months or Longer Aggregate Losses	4,750	178
Available-for-sale Securities Pledged as Collateral	194,980	178,121
Federal Home Loan Bank of Atlanta [Member] | National Bank of Blacksburg [Member]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Available to be Pledged	494,666
Restricted Stock [Member]
Restricted Investments	$ 1,200	1,170
US Government Agencies Debt Securities [Member]
Number of Temporarily Impaired Securities	231
Available-for-sale and Held to Maturity Securities Continuous Unrealized Loss Position Fair Value	$ 225,738
Continuous Unrealized Loss Position Aggregate Losses	4,623
Continuous Unrealized Loss Position Twelve Months or Longer Fair Value	225,738	996
Continuous Unrealized Loss Position 12 Months or Longer Aggregate Losses	$ 4,623	4
US States and Political Subdivisions Debt Securities [Member]
Number of Temporarily Impaired Securities	4
Available-for-sale and Held to Maturity Securities Continuous Unrealized Loss Position Fair Value	$ 2,989
Continuous Unrealized Loss Position Aggregate Losses	98
Continuous Unrealized Loss Position Twelve Months or Longer Fair Value	2,989	1,316
Continuous Unrealized Loss Position 12 Months or Longer Aggregate Losses	$ 98	148
Corporate Debt Securities [Member]
Number of Temporarily Impaired Securities	1
Available-for-sale and Held to Maturity Securities Continuous Unrealized Loss Position Fair Value	$ 948
Continuous Unrealized Loss Position Aggregate Losses	29
Continuous Unrealized Loss Position Twelve Months or Longer Fair Value	948	0
Continuous Unrealized Loss Position 12 Months or Longer Aggregate Losses	29	0
Other Securities [Member]
Continuous Unrealized Loss Position Twelve Months or Longer Fair Value		163
Continuous Unrealized Loss Position 12 Months or Longer Aggregate Losses		$ 26
Available-for-sale Securities, Gross Realized Gains	4
Available-for-sale Securities Sold, Book Value	$ 189

Note 3 - Securities - Securitie

Note 3 - Securities - Securities Available-for-sale (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Securities available-for-sale, amortized cost	$ 336,075	$ 309,802
Securities available-for-sale, gross unrealized gains	954	808
Securities available-for-sale, gross unrealized losses	5,642	6,328
Securities available-for-sale, fair value	331,387	304,282
US Government Agencies Debt Securities [Member]
Securities available-for-sale, amortized cost	312,604	291,271
Securities available-for-sale, gross unrealized gains	609	492
Securities available-for-sale, gross unrealized losses	5,494	6,165
Securities available-for-sale, fair value	307,719	285,598
US States and Political Subdivisions Debt Securities [Member]
Securities available-for-sale, amortized cost	16,853	11,482
Securities available-for-sale, gross unrealized gains	100	211
Securities available-for-sale, gross unrealized losses	119	0
Securities available-for-sale, fair value	16,834	11,693
Collateralized Mortgage Backed Securities [Member]
Securities available-for-sale, amortized cost	602	845
Securities available-for-sale, gross unrealized gains	57	85
Securities available-for-sale, gross unrealized losses	0	0
Securities available-for-sale, fair value	659	930
Corporate Debt Securities [Member]
Securities available-for-sale, amortized cost	6,016	6,015
Securities available-for-sale, gross unrealized gains	188	20
Securities available-for-sale, gross unrealized losses	29	137
Securities available-for-sale, fair value	$ 6,175	5,898
Other Securities [Member]
Securities available-for-sale, amortized cost		189
Securities available-for-sale, gross unrealized gains		0
Securities available-for-sale, gross unrealized losses		26
Securities available-for-sale, fair value		$ 163

Note 3 - Securities - Securit46

Note 3 - Securities - Securities by Contractual Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Amortized cost, due in one year or less, available for sale securities	$ 33,405
Fair value, due in one year or less, available for sale securities	33,238
Amortized cost, due after one year through five years, available for sale securities	192,388
Fair value, due after one year through five years, available for sale securities	189,005
Amortized cost, due after five years through ten years, available for sale securties	72,001
Fair value, due after five years through ten years, available for sale securities	70,509
Amortized cost, due after ten years, available for sale securities	38,281
Fair value, due after ten years, available for sale securities	38,635
Amortized cost, total securities available for sale	336,075
Fair value, total securities available for sale	331,387	$ 304,282
Amortized cost, due in one year or less, held to maturity securities	11,906
Fair value, due in one year or less, held to maturity securities	12,088
Amortized cost, due after one year through five years, held to maturity securities	24,403
Fair value, due after one year through five years, held to maturity securities	25,359
Amortized cost, due after five years through ten years, held to maturity securities	25,242
Fair value, due after give years through ten years, held to maturity securities	25,892
Amortized cost, due after ten years, held to maturity securities	65,613
Fair value, due after ten years, held to maturity securities	66,774
Amortized cost, total securities held to maturity	127,164	134,957
Fair value, total securities held to maturity	$ 130,113	$ 137,692

Note 3 - Securities - Securit47

Note 3 - Securities - Securities Held-to-maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Securities held-to-maturity, amortized cost	$ 127,164	$ 134,957
Securities held-to-maturity, gross unrealized gains	3,122	3,817
Securities held-to-maturity, gross unrealized losses	173	1,082
Securities held-to-maturity, fair value	130,113	137,692
US Government Agencies Debt Securities [Member]
Securities held-to-maturity, amortized cost	3,934	3,934
Securities held-to-maturity, gross unrealized gains	167	201
Securities held-to-maturity, gross unrealized losses	0	0
Securities held-to-maturity, fair value	4,101	4,135
US States and Political Subdivisions Debt Securities [Member]
Securities held-to-maturity, amortized cost	122,039	129,783
Securities held-to-maturity, gross unrealized gains	2,929	3,579
Securities held-to-maturity, gross unrealized losses	173	1,082
Securities held-to-maturity, fair value	124,795	132,280
Collateralized Mortgage Backed Securities [Member]
Securities held-to-maturity, amortized cost	209	265
Securities held-to-maturity, gross unrealized gains	21	30
Securities held-to-maturity, gross unrealized losses	0	0
Securities held-to-maturity, fair value	230	295
Corporate Debt Securities [Member]
Securities held-to-maturity, amortized cost	982	975
Securities held-to-maturity, gross unrealized gains	5	7
Securities held-to-maturity, gross unrealized losses	0	0
Securities held-to-maturity, fair value	$ 987	$ 982

Note 3 - Securities - Securit48

Note 3 - Securities - Securities in a Continuous Loss Position (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Temporarily impaired securities, less than 12 months, fair value	$ 87,068	$ 295,295
Temporarily impaired securities, less than 12 months unrealized loss	1,065	7,232
Temporarily impaired securities, 12 months or more fair value	229,675	2,475
Temporarily impaired securities, 12 months or more unrealized loss	4,750	178
US Government Agencies Debt Securities [Member]
Temporarily impaired securities, less than 12 months, fair value	68,380	260,150
Temporarily impaired securities, less than 12 months unrealized loss	871	6,161
Temporarily impaired securities, 12 months or more fair value	225,738	996
Temporarily impaired securities, 12 months or more unrealized loss	4,623	4
US States and Political Subdivisions Debt Securities [Member]
Temporarily impaired securities, less than 12 months, fair value	18,688	31,257
Temporarily impaired securities, less than 12 months unrealized loss	194	934
Temporarily impaired securities, 12 months or more fair value	2,989	1,316
Temporarily impaired securities, 12 months or more unrealized loss	98	148
Corporate Debt Securities [Member]
Temporarily impaired securities, less than 12 months, fair value		3,888
Temporarily impaired securities, less than 12 months unrealized loss		137
Temporarily impaired securities, 12 months or more fair value	948	0
Temporarily impaired securities, 12 months or more unrealized loss	$ 29	0
Other Securities [Member]
Temporarily impaired securities, less than 12 months, fair value		0
Temporarily impaired securities, less than 12 months unrealized loss		0
Temporarily impaired securities, 12 months or more fair value		163
Temporarily impaired securities, 12 months or more unrealized loss		$ 26

Note 3 - Securities - Realized

Note 3 - Securities - Realized Gains and Losses From Calls of Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Available for sale, proceeds	$ 13,620	$ 220,520	$ 63,775
Available for sale, book value	13,614	220,334	63,742
Available for sale, gross gain	6	186	34
Available for sale, gross loss	0		1
Available for sale, net gain (loss)	6	186	33
Held to maturity, proceeds	8,975	16,160	7,605
Held to maturity, book value	8,971	16,114	7,605
Held to maturity, gross gain	4	46
Held to maturity, gross loss	0	0
Held to maturity, net gain (loss)	$ 4	$ 46	$ 0

Note 4 - Related Party Transa50

Note 4 - Related Party Transactions (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Loans and Leases Receivable, Related Parties	$ 12,600	$ 9,445
Loans and Leases Receivable, Related Parties, Additions	7,407
Loans and Leases Receivable, Related Parties, Proceeds	3,996
Related Party Deposit Liabilities	15,612	14,604
Director [Member] | Small Office Space Lease to Related Party [Member]
Revenue from Related Parties	$ 5	$ 5

Note 5 - Allowance for Loan L51

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details Textual) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2015USD ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014
Threshold Period for Considering Loans as Special Mention or Classified		75 days
Allowance for Credit Losses, Change in Method of Calculating Impairment	$ 0	$ 0	$ 0	$ 0
Financing Receivable, Modifications, Number of Contracts		10	4	6
Financing Receivable, Modifications, Subsequent Default, Number of Contracts		0	0	0
Interest and Fee Income, Loans and Leases		$ 29,932	$ 29,365	$ 30,446
Nonperforming Financial Instruments [Member]
Interest and Fee Income, Loans and Leases		$ 0	$ 0	$ 0
Construction Loans [Member] | Become Non-Revolving and Interest Only Payments [Member]
Financing Receivable, Modifications, Number of Contracts	2
Commercial Non Real Estate Segment [Member]
Financing Receivable, Modifications, Number of Contracts			1
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member]
Financing Receivable, Modifications, Number of Contracts		4	1	1
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member] | Interest Method Changed from Variable to Fixed [Member]
Financing Receivable, Modifications, Number of Contracts		1
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member] | Contractual Interest Rate Reduction [Member]
Financing Receivable, Modifications, Number of Contracts		3
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member]
Allowance for Credit Losses, Change in Method of Calculating Impairment		$ 1
Financing Receivable, Modifications, Number of Contracts		4	1
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member] | Principal Forgiveness [Member]
Financing Receivable, Modifications, Number of Contracts		1
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Modifications, Number of Contracts					2
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member]
Financing Receivable, Modifications, Number of Contracts				3
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member] | Forgive Principal, Reduce Interest Rate, Capitalize Interest, and Re-amortize Payments [Member]
Allowance for Credit Losses, Change in Method of Calculating Impairment	$ 0			$ 0
Financing Receivable Modifications Principal Forgiven				100
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member] | Interest Only Payments [Member]
Allowance for Credit Losses, Change in Method of Calculating Impairment	$ 23			23
Financing Receivable, Modifications, Number of Contracts	2
Commercial Portfolio Segment [Member] | Extended Maturity [Member]
Allowance for Credit Losses, Change in Method of Calculating Impairment	$ 0			$ 0
Financing Receivable, Modifications, Number of Contracts	1
Special Mention [Member]
Increase in Percentage of Allocation Loans Rated Special Mention		50.00%
Classified Excluding Impaired [Member]
Increase in Percentage of Allocation Loans Rated Classified		100.00%

Note 5 - Allowance for Loan L52

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Balance	$ 8,300	$ 8,297	$ 8,263
Charge-offs	(819)	(1,806)	(2,120)
Recoveries	287	159	145
Provision for loan losses	157	1,650	2,009
Balance	7,925	8,300	8,297
Real Estate Construction Portfolio Segment[Member]
Balance	438	576	612
Charge-offs	0	(29)
Recoveries	0	0	0
Provision for loan losses	(101)	(109)	(36)
Balance	337	438	576
Consumer Real Estate Portfolio Segment [Member]
Balance	1,830	1,866	1,662
Charge-offs	(146)	(133)	(205)
Recoveries	1	2	2
Provision for loan losses	342	95	407
Balance	2,027	1,830	1,866
Commercial Real Estate Portfolio Segment [Member]
Balance	3,738	4,109	3,537
Charge-offs	(139)	(488)	(1,114)
Recoveries	131	83	49
Provision for loan losses	(686)	34	1,637
Balance	3,044	3,738	4,109
Commercial Non Real Estate Segment [Member]
Balance	1,063	655	1,475
Charge-offs	(82)	(883)	(490)
Recoveries	23	10	1
Provision for loan losses	68	(1,281)	(331)
Balance	1,072	1,063	655
Public Sector and IDA Portfolio Segment[Member]
Balance	330	436	327
Charge-offs	0	0	0
Recoveries	0	0	0
Provision for loan losses	89	(106)	109
Balance	419	330	436
Consumer Non Real Estate Portfolio Segment [Member]
Balance	644	627	602
Charge-offs	(452)	(273)	(311)
Recoveries	132	64	93
Provision for loan losses	383	226	243
Balance	707	644	627
Unallocated Financing Receivables [Member]
Balance	257	28	48
Charge-offs	0	0	0
Recoveries	0	0	0
Provision for loan losses	62	229	(20)
Balance	$ 319	$ 257	$ 28

Note 5 - Allowance for Loan L53

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Loans and Allowance for Loan Losses by Evaluation Method (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Allowance for loan losses, individually evaluated for impairment	$ 177	$ 26
Allowance for loan losses, collectively evaluated for impairment	7,748	8,274
Allowance for loan losses	7,925	8,300	$ 8,297	$ 8,263
Loans, individually evaluated for impairment	11,924	9,173
Loans, collectively evaluated for impairment	656,758	639,373
Loans	668,682	648,546
Real Estate Construction Portfolio Segment[Member]
Allowance for loan losses, individually evaluated for impairment	0	0
Allowance for loan losses, collectively evaluated for impairment	337	438
Allowance for loan losses	337	438	576	612
Loans, individually evaluated for impairment	2,882	270
Loans, collectively evaluated for impairment	31,812	36,075
Loans	34,694	36,345
Consumer Real Estate Portfolio Segment [Member]
Allowance for loan losses, individually evaluated for impairment	16	25
Allowance for loan losses, collectively evaluated for impairment	2,011	1,805
Allowance for loan losses	2,027	1,830	1,866	1,662
Loans, individually evaluated for impairment	1,267	877
Loans, collectively evaluated for impairment	165,698	156,841
Loans	166,965	157,718
Commercial Real Estate Portfolio Segment [Member]
Allowance for loan losses, individually evaluated for impairment	0	1
Allowance for loan losses, collectively evaluated for impairment	3,044	3,737
Allowance for loan losses	3,044	3,738	4,109	3,537
Loans, individually evaluated for impairment	6,516	7,782
Loans, collectively evaluated for impairment	333,898	328,675
Loans	340,414	336,457
Commercial Non Real Estate Segment [Member]
Allowance for loan losses, individually evaluated for impairment	160	0
Allowance for loan losses, collectively evaluated for impairment	912	1,063
Allowance for loan losses	1,072	1,063	655	1,475
Loans, individually evaluated for impairment	1,229	241
Loans, collectively evaluated for impairment	39,289	38,783
Loans	40,518	39,024
Public Sector and IDA Portfolio Segment[Member]
Allowance for loan losses, individually evaluated for impairment	0	0
Allowance for loan losses, collectively evaluated for impairment	419	330
Allowance for loan losses	419	330	436	327
Loans, individually evaluated for impairment	0	0
Loans, collectively evaluated for impairment	51,443	45,474
Loans	51,443	45,474
Consumer Non Real Estate Portfolio Segment [Member]
Allowance for loan losses, individually evaluated for impairment	1	0
Allowance for loan losses, collectively evaluated for impairment	706	644
Allowance for loan losses	707	644	627	602
Loans, individually evaluated for impairment	30	3
Loans, collectively evaluated for impairment	34,618	33,525
Loans	34,648	33,528
Unallocated Financing Receivables [Member]
Allowance for loan losses, individually evaluated for impairment	0	0
Allowance for loan losses, collectively evaluated for impairment	319	257
Allowance for loan losses	319	257	$ 28	$ 48
Loans, individually evaluated for impairment	0	0
Loans, collectively evaluated for impairment	0	0
Loans	$ 0	$ 0

Note 5 - Allowance for Loan L54

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Ratios of Allowance for Loan Losses (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Ratio of allowance for loan losses to the end of period loans, net of unearned income and deferred fees and costs	1.19%	1.28%
Ratio of net charge-offs to average loans, net of unearned income and deferred fees and costs	0.08%	0.26%

Note 5 - Allowance for Loan L55

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Nonperforming Assets (Details) - USD ($) $ in Thousands		Dec. 31, 2017	Dec. 31, 2016
Nonperforming assets:
Nonaccrual loans		$ 6	$ 1,168
Restructured loans in nonaccrual		2,763	4,687
Total nonperforming loans		2,769	5,855
Other real estate owned, net		2,817	3,156
Total nonperforming assets		$ 5,586	$ 9,011
Ratio of nonperforming assets to loans, net of unearned income and deferred fees and costs, plus other real estate owned		0.83%	1.38%
Ratio of allowance for loan losses to nonperforming loans	[1]	286.20%	141.76%
[1]	The Company defines nonperforming loans as total nonaccrual and restructured loans that are nonaccrual. Loans 90 days past due and still accruing and accruing restructured loans are excluded.

Note 5 - Allowance for Loan L56

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Loans Past Due 90 Days or More and Impaired Loans (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Loans past due 90 days or more and still accruing		$ 51		$ 63
Ratio of loans past due 90 days or more and still accruing to loans, net of unearned income and deferred fees and costs		0.01%		0.01%
Accruing restructured loans		$ 5,134		$ 3,769
Impaired loans:
Impaired loans with no valuation allowance	[1]	10,444		8,269
Impaired loans with a valuation allowance	[1]	1,480		904
Total impaired loans	[1]	11,924		9,173
Valuation allowance		(177)		(26)
Impaired loans, net of allowance		11,747		9,147
Average recorded investment in impaired loans	[3]	13,344	[2]	11,585	[2]	$ 17,297
Income recognized on impaired loans, after designation as impaired		528		553		$ 769
Amount of income recognized on a cash basis		$ 0		$ 0
[1]	Recorded investment is net of charge-offs and interest paid while a loan is in nonaccrual status.
[2]	Recorded investment is net of charge-offs and interest paid while a loan is in nonaccrual status.
[3]	Recorded investment is net of charge-offs and interest paid while a loan is in nonaccrual status.

Note 5 - Allowance for Loan L57

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Impaired Loans and Associated Reserves (Details) - USD ($) $ in Thousands		Dec. 31, 2017	Dec. 31, 2016
Principal balance		$ 12,319	$ 9,820
Total recorded investment	[1]	11,924	9,173
Recorded investment for which there is no related allowance	[1]	10,444	8,269
Recorded investment for which there is a related allowance	[1]	1,480	904
Related allowance		177	26
Real Estate Construction Portfolio Segment[Member] | Construction, Other [Member]
Principal balance	[2]	2,882
Total recorded investment	[1],[2]	2,882
Recorded investment for which there is no related allowance	[1],[2]	2,882
Recorded investment for which there is a related allowance	[1],[2]	0
Related allowance	[2]	0
Real Estate Construction Portfolio Segment[Member] | Construction, 1-4 Family Residential [Member]
Principal balance	[2]		280
Total recorded investment	[1],[2]		270
Recorded investment for which there is no related allowance	[1],[2]		270
Recorded investment for which there is a related allowance	[1],[2]		0
Related allowance	[2]		0
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member]
Principal balance	[2]	807	648
Total recorded investment	[1],[2]	768	609
Recorded investment for which there is no related allowance	[1],[2]	590	267
Recorded investment for which there is a related allowance	[1],[2]	178	342
Related allowance	[2]	10	14
Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member]
Principal balance	[2]	174	195
Total recorded investment	[1],[2]	174	195
Recorded investment for which there is no related allowance	[1],[2]	0	0
Recorded investment for which there is a related allowance	[1],[2]	174	195
Related allowance	[2]	6	7
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member]
Principal balance	[2]	347	73
Total recorded investment	[1],[2]	325	73
Recorded investment for which there is no related allowance	[1],[2]	325
Recorded investment for which there is a related allowance	[1],[2]	0	73
Related allowance	[2]	0	4
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member]
Principal balance	[2]	303	1,364
Total recorded investment	[1],[2]	303	1,091
Recorded investment for which there is no related allowance	[1],[2]	303	1,091
Recorded investment for which there is a related allowance	[1],[2]
Related allowance	[2]	0	0
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member]
Principal balance	[2]	3,619	4,005
Total recorded investment	[1],[2]	3,611	3,957
Recorded investment for which there is no related allowance	[1],[2]	3,611	3,663
Recorded investment for which there is a related allowance	[1],[2]	0	294
Related allowance	[2]	0	1
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member]
Principal balance	[2]	2,921	2,997
Total recorded investment	[1],[2]	2,602	2,734
Recorded investment for which there is no related allowance	[1],[2]	2,602	2,734
Recorded investment for which there is a related allowance	[1],[2]	0	0
Related allowance	[2]	0	0
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member]
Principal balance	[2]	1,236	255
Total recorded investment	[1],[2]	1,229	241
Recorded investment for which there is no related allowance	[1],[2]	126	241
Recorded investment for which there is a related allowance	[1],[2]	1,103
Related allowance	[2]	160
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member]
Principal balance	[2]	30	3
Total recorded investment	[1],[2]	30	3
Recorded investment for which there is no related allowance	[1],[2]	5	3
Recorded investment for which there is a related allowance	[1],[2]	25
Related allowance	[2]	$ 1
[1]	Recorded investment is net of charge-offs and interest paid while a loan is in nonaccrual status.
[2]	Only classes with impaired loans are shown.

Note 5 - Allowance for Loan L58

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Impaired Loans, Average Investment and Interest Income (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Average recorded investment in impaired loans	[2]	$ 13,344	[1]	$ 11,585	[1]	$ 17,297
Income recognized on impaired loans, after designation as impaired		528		553		769
Real Estate Construction Portfolio Segment[Member] | Construction, Other [Member]
Average recorded investment in impaired loans	[2],[3]	3,298
Income recognized on impaired loans, after designation as impaired	[3]	177
Real Estate Construction Portfolio Segment[Member] | Construction, 1-4 Family Residential [Member]
Average recorded investment in impaired loans	[2],[3]			462		612
Income recognized on impaired loans, after designation as impaired	[3]			10		23
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member]
Average recorded investment in impaired loans	[2],[3]	781		642		681
Income recognized on impaired loans, after designation as impaired	[3]	57		38		43
Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member]
Average recorded investment in impaired loans	[2],[3]	185		207		228
Income recognized on impaired loans, after designation as impaired	[3]	11		13		15
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member]
Average recorded investment in impaired loans	[2],[3]	329		74		76
Income recognized on impaired loans, after designation as impaired	[3]	1		4		5
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member]
Average recorded investment in impaired loans	[2],[3]	748		1,366		2,581
Income recognized on impaired loans, after designation as impaired	[3]	16		12		84
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member]
Average recorded investment in impaired loans	[2],[3]	4,047		4,342		6,141
Income recognized on impaired loans, after designation as impaired	[3]	200		206		251
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member]
Average recorded investment in impaired loans	[2],[3]	2,638		3,947		5,888
Income recognized on impaired loans, after designation as impaired	[3]			263		308
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member]
Average recorded investment in impaired loans	[2],[3]	1,282		541		1,090
Income recognized on impaired loans, after designation as impaired	[3]	64		7		$ 40
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member]
Average recorded investment in impaired loans	[2],[3]	36		4
Income recognized on impaired loans, after designation as impaired	[3]	$ 2		$ 0
[1]	Recorded investment is net of charge-offs and interest paid while a loan is in nonaccrual status.
[2]	Recorded investment is net of charge-offs and interest paid while a loan is in nonaccrual status.
[3]	Only classes with impaired loans are shown.

Note 5 - Allowance for Loan L59

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Past Due and Nonaccrual Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Loans past due 90 days or more and still accruing	$ 51	$ 63
Nonaccruals	2,769	5,855
Real Estate Construction Portfolio Segment[Member] | Construction Residential [Member]
Loans past due 90 days or more and still accruing	0	0
Nonaccruals	0	270
Real Estate Construction Portfolio Segment[Member] | Construction, Other [Member]
Loans past due 90 days or more and still accruing	0	0
Nonaccruals	0	0
Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member]
Loans past due 90 days or more and still accruing	0	0
Nonaccruals	0	0
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member]
Loans past due 90 days or more and still accruing	11	6
Nonaccruals	145	0
Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member]
Loans past due 90 days or more and still accruing	0	36
Nonaccruals	0	0
Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member]
Loans past due 90 days or more and still accruing	0	0
Nonaccruals	6	253
Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member]
Loans past due 90 days or more and still accruing	0	0
Nonaccruals	0	1,091
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member]
Loans past due 90 days or more and still accruing	0	0
Nonaccruals	0	1,183
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member]
Loans past due 90 days or more and still accruing	0	0
Nonaccruals	2,602	2,814
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member]
Loans past due 90 days or more and still accruing	0
Nonaccruals	15
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans past due 90 days or more and still accruing		0
Nonaccruals		241
Public Sector and IDA Portfolio Segment[Member]
Loans past due 90 days or more and still accruing	0	0
Nonaccruals	0	0
Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member]
Loans past due 90 days or more and still accruing	12	5
Nonaccruals	0	0
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member]
Loans past due 90 days or more and still accruing	22	12
Nonaccruals	1	3
Consumer Non Real Estate Portfolio Segment [Member] | Other Consumer Loans [Member]
Loans past due 90 days or more and still accruing	6	4
Nonaccruals	0	0
Financing Receivables 30 to 89 Days Past Due [Member]
Loans past due and accruing	2,263	2,553
Financing Receivables 30 to 89 Days Past Due [Member] | Real Estate Construction Portfolio Segment[Member] | Construction Residential [Member]
Loans past due and accruing	0	0
Financing Receivables 30 to 89 Days Past Due [Member] | Real Estate Construction Portfolio Segment[Member] | Construction, Other [Member]
Loans past due and accruing	0	25
Financing Receivables 30 to 89 Days Past Due [Member] | Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member]
Loans past due and accruing	0	10
Financing Receivables 30 to 89 Days Past Due [Member] | Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member]
Loans past due and accruing	637	1,498
Financing Receivables 30 to 89 Days Past Due [Member] | Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member]
Loans past due and accruing	188	114
Financing Receivables 30 to 89 Days Past Due [Member] | Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member]
Loans past due and accruing	66	56
Financing Receivables 30 to 89 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member]
Loans past due and accruing	303	132
Financing Receivables 30 to 89 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member]
Loans past due and accruing	402	339
Financing Receivables 30 to 89 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member]
Loans past due and accruing	0	0
Financing Receivables 30 to 89 Days Past Due [Member] | Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member]
Loans past due and accruing	131
Financing Receivables 30 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans past due and accruing		6
Financing Receivables 30 to 89 Days Past Due [Member] | Public Sector and IDA Portfolio Segment[Member]
Loans past due and accruing	0	0
Financing Receivables 30 to 89 Days Past Due [Member] | Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member]
Loans past due and accruing	7	8
Financing Receivables 30 to 89 Days Past Due [Member] | Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member]
Loans past due and accruing	375	234
Financing Receivables 30 to 89 Days Past Due [Member] | Consumer Non Real Estate Portfolio Segment [Member] | Other Consumer Loans [Member]
Loans past due and accruing	154	131
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Loans past due and accruing	2,658	1,888
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Real Estate Construction Portfolio Segment[Member] | Construction Residential [Member]
Loans past due and accruing	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Real Estate Construction Portfolio Segment[Member] | Construction, Other [Member]
Loans past due and accruing	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Real Estate Portfolio Segment [Member] | Equity Lines [Member]
Loans past due and accruing	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member]
Loans past due and accruing	16	6
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Real Estate Portfolio Segment [Member] | Closed End Junior Liens [Member]
Loans past due and accruing	0	36
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Real Estate Portfolio Segment [Member] | Investor Owned Residential Real Estate [Member]
Loans past due and accruing	0	234
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] | Multifamily Real Estate [Member]
Loans past due and accruing	0	1,091
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member]
Loans past due and accruing	0	202
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member]
Loans past due and accruing	2,602	80
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member]
Loans past due and accruing	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans past due and accruing		218
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Public Sector and IDA Portfolio Segment[Member]
Loans past due and accruing	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Non Real Estate Portfolio Segment [Member] | Credit Card Receivable [Member]
Loans past due and accruing	12	5
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member]
Loans past due and accruing	22	12
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Consumer Non Real Estate Portfolio Segment [Member] | Other Consumer Loans [Member]
Loans past due and accruing	$ 6	$ 4

Note 5 - Allowance for Loan L60

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Loans by Credit Quality Indicator (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Loans, collectively evaluated for impairment	$ 656,758	$ 639,373
Real Estate Construction Portfolio Segment[Member]
Loans, collectively evaluated for impairment	31,812	36,075
Consumer Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	165,698	156,841
Commercial Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	333,898	328,675
Commercial Non Real Estate Segment [Member]
Loans, collectively evaluated for impairment	39,289	38,783
Consumer Non Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	34,618	33,525
Pass [Member]
Loans, collectively evaluated for impairment	651,706	622,802
Pass [Member] | States Political Subdivisions [Member]
Loans, collectively evaluated for impairment	51,443	45,474
Special Mention [Member]
Loans, collectively evaluated for impairment	3,361	13,519
Special Mention [Member] | States Political Subdivisions [Member]
Loans, collectively evaluated for impairment	0	0
Classified Excluding Impaired [Member]
Loans, collectively evaluated for impairment	1,691	3,052
Classified Excluding Impaired [Member] | States Political Subdivisions [Member]
Loans, collectively evaluated for impairment	0	0
Construction, 1-4 Family Residential [Member] | Pass [Member] | Real Estate Construction Portfolio Segment[Member]
Loans, collectively evaluated for impairment	10,396	11,635
Construction, 1-4 Family Residential [Member] | Special Mention [Member] | Real Estate Construction Portfolio Segment[Member]
Loans, collectively evaluated for impairment	0	3,648
Construction, 1-4 Family Residential [Member] | Classified Excluding Impaired [Member] | Real Estate Construction Portfolio Segment[Member]
Loans, collectively evaluated for impairment	0	0
Construction, Other [Member] | Pass [Member] | Real Estate Construction Portfolio Segment[Member]
Loans, collectively evaluated for impairment	21,416	20,972
Construction, Other [Member] | Special Mention [Member] | Real Estate Construction Portfolio Segment[Member]
Loans, collectively evaluated for impairment	0	0
Construction, Other [Member] | Classified Excluding Impaired [Member] | Real Estate Construction Portfolio Segment[Member]
Loans, collectively evaluated for impairment	0	0
Equity Lines [Member] | Pass [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	16,673	17,034
Equity Lines [Member] | Special Mention [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	39	82
Equity Lines [Member] | Classified Excluding Impaired [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	0	0
Closed End First Liens [Member] | Pass [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	85,975	83,658
Closed End First Liens [Member] | Special Mention [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	2,400	1,267
Closed End First Liens [Member] | Classified Excluding Impaired [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	355	580
Closed End Junior Liens [Member] | Pass [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	4,483	4,861
Closed End Junior Liens [Member] | Special Mention [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	29	15
Closed End Junior Liens [Member] | Classified Excluding Impaired [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	12	151
Investor Owned Residential Real Estate [Member] | Pass [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	55,410	48,277
Investor Owned Residential Real Estate [Member] | Special Mention [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	66	333
Investor Owned Residential Real Estate [Member] | Classified Excluding Impaired [Member] | Consumer Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	256	583
Multifamily Real Estate [Member] | Pass [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	95,894	99,002
Multifamily Real Estate [Member] | Special Mention [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	127	1,733
Multifamily Real Estate [Member] | Classified Excluding Impaired [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment		0
Commercial Real Estate, Owner Occupied [Member] | Pass [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	130,256	120,170
Commercial Real Estate, Owner Occupied [Member] | Special Mention [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	246	1,188
Commercial Real Estate, Owner Occupied [Member] | Classified Excluding Impaired [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	763	1,425
Commercial Real Estate Other [Member] | Pass [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	106,612	103,534
Commercial Real Estate Other [Member] | Special Mention [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	0	1,543
Commercial Real Estate Other [Member] | Classified Excluding Impaired [Member] | Commercial Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	0	80
Commercial and Industrial [Member] | Pass [Member] | Commercial Non Real Estate Segment [Member]
Loans, collectively evaluated for impairment	38,904	35,521
Commercial and Industrial [Member] | Special Mention [Member] | Commercial Non Real Estate Segment [Member]
Loans, collectively evaluated for impairment	220	3,229
Commercial and Industrial [Member] | Classified Excluding Impaired [Member] | Commercial Non Real Estate Segment [Member]
Loans, collectively evaluated for impairment	165	33
Credit Card Receivable [Member] | Pass [Member] | Consumer Non Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	5,493	5,978
Credit Card Receivable [Member] | Special Mention [Member] | Consumer Non Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	0	0
Credit Card Receivable [Member] | Classified Excluding Impaired [Member] | Consumer Non Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	0	0
Automobile Loan [Member] | Pass [Member] | Consumer Non Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	16,059	14,457
Automobile Loan [Member] | Special Mention [Member] | Consumer Non Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	218	25
Automobile Loan [Member] | Classified Excluding Impaired [Member] | Consumer Non Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	116	192
Other Consumer Loans [Member] | Pass [Member] | Consumer Non Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	12,692	12,229
Other Consumer Loans [Member] | Special Mention [Member] | Consumer Non Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	16	636
Other Consumer Loans [Member] | Classified Excluding Impaired [Member] | Consumer Non Real Estate Portfolio Segment [Member]
Loans, collectively evaluated for impairment	$ 24	$ 8

Note 5 - Allowance for Loan L61

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Restructurings By Class (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014
Number of contracts		10	4	6
Pre-modification outstanding principal balance		$ 1,387	$ 3,042	$ 3,628
Post-modification outstanding principal balance	[1]	$ 1,387	$ 3,043	$ 3,541
Consumer Real Estate Portfolio Segment [Member] | Closed End First Liens [Member]
Number of contracts		1
Pre-modification outstanding principal balance		$ 8
Post-modification outstanding principal balance	[1]	$ 8
Commercial Real Estate Portfolio Segment [Member]
Number of contracts					2
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member]
Number of contracts		1	2
Pre-modification outstanding principal balance		$ 132	$ 3,008
Post-modification outstanding principal balance	[1]	$ 132	$ 3,008
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member]
Number of contracts				3
Pre-modification outstanding principal balance				$ 2,710
Post-modification outstanding principal balance	[1]			$ 2,623
Real Estate Construction Portfolio Segment[Member] | Construction, 1-4 Family Residential [Member]
Number of contracts				2
Pre-modification outstanding principal balance				$ 718
Post-modification outstanding principal balance	[1]			$ 718
Commercial Non Real Estate Segment [Member]
Number of contracts			1
Commercial Non Real Estate Segment [Member] | Commercial and Industrial [Member]
Number of contracts		4	1	1
Pre-modification outstanding principal balance		$ 1,221	$ 29	$ 200
Post-modification outstanding principal balance	[1]	$ 1,221	$ 30	$ 200
Consumer Non Real Estate Portfolio Segment [Member] | Automobile Loan [Member]
Number of contracts		4	1
Pre-modification outstanding principal balance		$ 26	$ 5
Post-modification outstanding principal balance	[1]	$ 26	$ 5
[1]	Post-modification outstanding recorded investment considers amounts immediately following the modification. Amounts do not reflect balances at the end of the period.

Note 6 - Premises and Equipme62

Note 6 - Premises and Equipment (Details Textual) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Depreciation		$ 805	$ 801	$ 749
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$ 292	292
Operating Leases, Future Minimum Payments, Due in Two Years	233	233
Operating Leases, Future Minimum Payments, Due in Three Years	56	56
Operating Leases, Future Minimum Payments, Due in Four Years	34	34
Operating Leases, Future Minimum Payments, Due in Five Years	34	34
Operating Leases, Future Minimum Payments, Due Thereafter	130	$ 130
Marion Branch Office [Member]
Gain (Loss) on Disposition of Property Plant Equipment	$ 134

Note 6 - Premises and Equipme63

Note 6 - Premises and Equipment - Premises and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Premises and Equipment	$ 17,672	$ 17,606
Accumulated depreciation	(9,451)	(8,753)
Premises and equipment, net	8,221	8,853
Building [Member]
Premises and Equipment	12,434	12,554
Furniture and Fixtures [Member]
Premises and Equipment	$ 5,238	$ 5,052

Note 7 - Deposits (Details Text

Note 7 - Deposits (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Time Deposits, at or Above FDIC Insurance Limit	$ 14,283	$ 15,797
Deposit Liabilities Reclassified as Loans Receivable	$ 255	$ 417

Note 7 - Deposits - Maturities

Note 7 - Deposits - Maturities of Time Deposits (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
2,018	$ 76,378
2,019	30,124
2,020	2,224
2,021	2,931
2,022	3,227
Thereafter
Total time deposits	$ 114,884	$ 130,614

Note 8 - Employee Benefit Pla66

Note 8 - Employee Benefit Plans (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	100.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 340	$ 315	$ 294
Age Attained to be Eligible for ESOP	21 years
Employee Stock Ownership Plan (ESOP), Cash Contributions to ESOP	$ 200	150	200
Employee Stock Ownership Plan (ESOP), Number of Allocated Shares	236,221
Age of Employees Required to Diversify Allocated ESOP Shares	55 years
Years of Plan Participation Required to Diversify Allocated ESOP Shares	10 years
Percentage of Allocated ESOP Shares That Can be Diversified	50.00%
Accrued Expenses for Salary Continuation Plan	$ 272	$ 242	$ 396
Equity Securities [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	65.00%
Fixed Income Securities [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	35.00%
Hedge Funds [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	0.00%
Private Equity Funds [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	0.00%
Real Estate [Member]
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	0.00%

Note 8 - Employee Benefit Pla67

Note 8 - Employee Benefit Plans - Defined Benefit Plan Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Fair value of plan assets at beginning of year	$ 17,038
Fair value of plan assets at end of year	23,428	$ 17,038
Amortization of prior service cost	71	72	$ 72
Pension Plan [Member]
Projected benefit obligation at beginning of year	21,059	20,427	19,324
Service cost	692	694	620
Interest cost	743	757	669
Actuarial loss	1,417	198	798
Benefits paid	(419)	(1,017)	(984)
Projected benefit obligation at end of year	23,492	21,059	20,427
Fair value of plan assets at beginning of year	17,038	16,131	17,130
Actual return on plan assets	2,302	1,113	(155)
Employer contribution	4,507	811	140
Benefits paid	(419)	(1,017)	(984)
Fair value of plan assets at end of year	23,428	17,038	16,131
Funded status at the end of the year	(64)	(4,021)	(4,296)
Deferred tax asset	13	1,407	1,504
Other liabilities	(64)	(4,021)	(4,296)
Total amounts recognized in the Consolidated Balance Sheet	(51)	(2,614)	(2,792)
Net gain (loss)	(7,923)	(8,250)	(8,627)
Prior service cost	340	449	559
Deferred tax asset	1,592	2,730	2,798
Amount recognized	(5,991)	(5,071)	(5,270)
Benefit obligation	(23,492)	(21,059)	(20,427)
Fair value of assets	23,428	17,038	16,131
Unrecognized net actuarial loss	7,923	8,250	8,627
Unrecognized prior service cost	(340)	(449)	(559)
Deferred tax liability	(1,579)	(1,323)	(1,294)
Prepaid benefit cost included in other assets	5,940	2,457	2,478
Expected return on plan assets	(1,097)	(1,110)	(1,166)
Amortization of prior service cost	(110)	(110)	(110)
Recognized net actuarial loss	540	572	414
Net periodic benefit cost	768	803	427
Net (gain) loss	(328)	(377)	1,705
Amortization of prior service cost	110	110	110
Deferred income tax expense (benefit)	46	93	(635)
Total recognized	(172)	(174)	1,180
Total recognized in net periodic benefit cost and other comprehensive loss	$ 550	$ 536	$ 2,242
Discount rate used for net periodic pension cost	4.00%	4.00%	3.75%
Discount rate used for disclosure	3.50%	4.00%	4.00%
Expected return on plan assets	7.50%	7.50%	7.50%
Rate of compensation increase	3.00%	3.00%	3.00%

Note 8 - Employee Benefit Pla68

Note 8 - Employee Benefit Plans - Fair Value Measurements (Details) - USD ($) $ in Thousands		Dec. 31, 2017	Dec. 31, 2016
Fair value, plan assets		$ 23,428	$ 17,038
Fair Value, Inputs, Level 1 [Member]
Fair value, plan assets		16,414	10,484
Fair Value, Inputs, Level 2 [Member]
Fair value, plan assets		7,014	6,554
Fair Value, Inputs, Level 3 [Member]
Fair value, plan assets		0	0
Cash [Member]
Fair value, plan assets		4,454	207
Cash [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value, plan assets		4,454	207
Cash [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value, plan assets		0	0
Cash [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value, plan assets		0	0
Equity Securities US Companies [Member]
Fair value, plan assets		9,892	9,195
Equity Securities US Companies [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value, plan assets		9,892	9,195
Equity Securities US Companies [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value, plan assets		0	0
Equity Securities US Companies [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value, plan assets		0	0
Equity Securities International Companies [Member]
Fair value, plan assets		106	116
Equity Securities International Companies [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value, plan assets		106	116
Equity Securities International Companies [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value, plan assets		0	0
Equity Securities International Companies [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value, plan assets		0	0
Equity Funds [Member]
Fair value, plan assets	[1]	1,962	966
Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value, plan assets	[1]	1,962	966
Equity Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value, plan assets	[1]	0	0
Equity Funds [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value, plan assets	[1]	0	0
US Government Corporations and Agencies Securities [Member]
Fair value, plan assets		51	53
US Government Corporations and Agencies Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value, plan assets		0	0
US Government Corporations and Agencies Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value, plan assets		51	53
US Government Corporations and Agencies Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value, plan assets		0	0
US States and Political Subdivisions Debt Securities [Member]
Fair value, plan assets		231	230
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value, plan assets		0	0
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value, plan assets		231	230
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value, plan assets		0	0
Corporate Debt Securities [Member] | External Credit Rating, Investment Grade [Member]
Fair value, plan assets	[2]	6,732	6,271
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] | External Credit Rating, Investment Grade [Member]
Fair value, plan assets	[2]	0	0
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] | External Credit Rating, Investment Grade [Member]
Fair value, plan assets	[2]	6,732	6,271
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] | External Credit Rating, Investment Grade [Member]
Fair value, plan assets	[2]	$ 0	$ 0
[1]	This category comprises actively managed equity funds invested in large-cap and mid-cap U.S. companies.
[2]	This category represents investment grade bonds of U.S. issuers from diverse industries.

Note 8 - Employee Benefit Pla69

Note 8 - Employee Benefit Plans - Expected Future Benefit Payments (Details) $ in Thousands	Dec. 31, 2017USD ($)
2,018	$ 4,229
2,019	1,060
2,020	1,630
2,021	738
2,022	1,277
2023-2027	$ 6,546

Note 9 - Stock Option Plan (Det

Note 9 - Stock Option Plan (Details Textual) - Stock Option Plan 1999 [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0	0	7,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value			$ 54
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense			$ 0

Note 10 - Income Taxes (Details

Note 10 - Income Taxes (Details Textual) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	$ 1,560,000		$ 1,560,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			35.00%
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%
Earliest Tax Year [Member]
Open Tax Year			2,014

Note 10 - Income Taxes - Alloca

Note 10 - Income Taxes - Allocation of Income Tax Expense (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Current		$ 2,943,000	$ 3,934,000	$ 4,730,000
Deferred income tax expense		1,790,000	18,000	10,000
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	$ 1,560,000	1,560,000
Total income tax expense		$ 6,293,000	$ 3,952,000	$ 4,740,000

Note 10 - Income Taxes - Reconc

Note 10 - Income Taxes - Reconciliation of Expected Income Tax Expense With Reported Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Computed “expected” income tax expense	$ 7,135	$ 6,613	$ 7,201
Tax impact of enacted change in tax rate	1,560
Tax-exempt interest income	(2,144)	(2,234)	(2,381)
Nondeductible interest expense	89	92	101
Other, net	(347)	(519)	(181)
Total income tax expense	$ 6,293	$ 3,952	$ 4,740

Note 10 - Income Taxes - Compon

Note 10 - Income Taxes - Components of Net Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets:
Allowance for loan losses and unearned fee income	$ 1,773	$ 3,347
Valuation allowance on other real estate owned	156	237
Defined benefit plan	1,592	2,730
Deferred compensation and other liabilities	863	1,336
Discount accretion of securities		15
Net unrealized loss on securities available for sale	984	1,932
Total deferred tax assets	5,368	9,597
Deferred tax liabilities:
Fixed assets	(388)	(620)
Deposit intangibles	(1,059)	(1,573)
Defined benefit plan, prepaid portion	(1,579)	(1,345)
Discount accretion of securities	(2)
Total deferred tax liabilities	(3,028)	(3,538)
Net deferred tax assets	$ 2,340	$ 6,059

Note 11 - Restrictions on Div75

Note 11 - Restrictions on Dividends (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash Dividends Paid to Parent Company by Consolidated Subsidiaries	$ 8,141	$ 9,071	$ 7,930
Payments of Dividends	$ 8,141	8,071	$ 7,930
Period of Restriction on Retained Net Income Without Prior Approval	2 years
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval	$ 20,820
National Bankshares Financial Services [Member]
Payments of Dividends		$ 350

Note 12 - Minimum Regulatory 76

Note 12 - Minimum Regulatory Capital Requirement (Details Textual) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Risk Weighted Assets	$ 808,690	$ 718,739
National Bank of Blacksburg [Member]
Risk Weighted Assets	$ 805,656	$ 715,294

Note 12 - Minimum Regulatory 77

Note 12 - Minimum Regulatory Capital Requirement - Minimum Capital Requirements (Details) - USD ($) $ in Thousands	Dec. 31, 2017		Dec. 31, 2016
Total capital (to risk weighted assets), actual, amount	$ 198,468		$ 191,006
Total capital (to risk weighted assets), actual, ratio	24.542%		26.575%
Total capital (to risk weighted assets), minimum capital requirement, amount	$ 74,804	[1]	$ 57,499
Total capital (to risk weighted assets), minimum capital requirement, ratio	9.25%	[1]	8.625%
Total capital (to risk weighted assets), minimum to be well capitalized, amount
Total capital (to risk weighted assets), minimum to be well capitalized, ratio
Tier 1 capital (to risk weighted assets), actual, amount	$ 190,543		$ 182,706
Tier 1 capital (to risk weighted assets), actual, ratio	23.562%		25.42%
Tier 1 capital (to risk weighted assets), minimum capital requirement, amount	$ 58,630	[1]	$ 43,124
Tier 1 capital (to risk weighted assets), minimum capital requirement, ratio	7.25%	[1]	6.625%
Tier 1 capital (to risk weighted assets), minimum to be well capitalized, amount
Tier 1 capital (to risk weighted assets), minimum to be well capitalized, ratio
Common equity tier 1 capital (to risk weighted assets), actual, amount	$ 190,543		$ 182,706
Common equity tier 1 capital (to risk weighted assets), actual, ratio	23.562%		25.42%
Common equity tier 1 capital (to risk weighted assets), minimum capital requirement, amount	$ 46,500	[1]	$ 32,343
Common equity tier 1 capital (to risk weighted assets), minimum capital requirement, ratio	5.75%	[1]	5.125%
Common equity tier 1 capital (to risk weighted assets), minimum to be well capitalized, amount
Common equity tier 1 capital (to risk weighted assets), minimum to be well capitalized, ratio
Tier 1 capital (to average assets), actual, amount	$ 190,543		$ 182,706
Tier 1 capital (to average assets), actual, ratio	15.424%		15.121%
Tier 1 capital (to average assets), minimum capital requirement, amount	$ 49,413	[1]	$ 48,333
Tier 1 capital (to average assets), minimum capital requirement, ratio	4.00%	[1]	4.00%
Tier 1 capital (to average assets), minimum to be well capitalized, amount
Tier 1 capital (to average assets), minimum to be well capitalized, ratio
National Bank of Blacksburg [Member]
Total capital (to risk weighted assets), actual, amount	$ 195,903		$ 188,095
Total capital (to risk weighted assets), actual, ratio	24.316%		26.296%
Total capital (to risk weighted assets), minimum capital requirement, amount	$ 74,523	[1]	$ 57,224
Total capital (to risk weighted assets), minimum capital requirement, ratio	9.25%	[1]	8.625%
Total capital (to risk weighted assets), minimum to be well capitalized, amount	$ 80,566		$ 71,529
Total capital (to risk weighted assets), minimum to be well capitalized, ratio	10.00%		10.00%
Tier 1 capital (to risk weighted assets), actual, amount	$ 187,978		$ 179,795
Tier 1 capital (to risk weighted assets), actual, ratio	23.332%		25.136%
Tier 1 capital (to risk weighted assets), minimum capital requirement, amount	$ 58,410	[1]	$ 42,918
Tier 1 capital (to risk weighted assets), minimum capital requirement, ratio	7.25%	[1]	6.625%
Tier 1 capital (to risk weighted assets), minimum to be well capitalized, amount	$ 64,452		$ 57,224
Tier 1 capital (to risk weighted assets), minimum to be well capitalized, ratio	8.00%		8.00%
Common equity tier 1 capital (to risk weighted assets), actual, amount	$ 187,978		$ 179,795
Common equity tier 1 capital (to risk weighted assets), actual, ratio	23.332%		25.136%
Common equity tier 1 capital (to risk weighted assets), minimum capital requirement, amount	$ 46,325	[1]	$ 32,188
Common equity tier 1 capital (to risk weighted assets), minimum capital requirement, ratio	5.75%	[1]	5.125%
Common equity tier 1 capital (to risk weighted assets), minimum to be well capitalized, amount	$ 52,368		$ 46,494
Common equity tier 1 capital (to risk weighted assets), minimum to be well capitalized, ratio	6.50%		6.50%
Tier 1 capital (to average assets), actual, amount	$ 187,978		$ 179,795
Tier 1 capital (to average assets), actual, ratio	15.254%		14.964%
Tier 1 capital (to average assets), minimum capital requirement, amount	$ 49,293	[1]	$ 48,060
Tier 1 capital (to average assets), minimum capital requirement, ratio	4.00%	[1]	4.00%
Tier 1 capital (to average assets), minimum to be well capitalized, amount	$ 61,616		$ 60,075
Tier 1 capital (to average assets), minimum to be well capitalized, ratio	5.00%		5.00%
[1]	Except with regard to the Company's and the Bank's Tier 1 capital to average assets ratio, the minimum capital requirement includes the current phased-in portion of the Basel III Capital Rules capital conservation buffer (1.25%) which is added to the minimum capital requirements for capital adequacy purposes. The capital conservation buffer is being phased in through four equal annual installments of .0625% from 2016 to 2019, with full implementation in January 2019 (2.5%). The Company's and the Bank's capital conservation buffer must consist of additional CET1 above regulatory minimum requirement. Failure to maintain the prescribed levels would result in limitations on capital distributions and discretionary bonuses to executives.

Note 13 - Condensed Financial78

Note 13 - Condensed Financial Statements of Parent Company - Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Assets
Cash and due from banks	$ 12,926	$ 13,974	$ 12,152	$ 12,894
Interest-bearing deposits	51,233	80,268
Securities available for sale, at fair value	331,387	304,282
Other assets	16,454	13,128
Total assets	1,256,757	1,233,942
Liabilities and Stockholders’ Equity
Other liabilities	12,065	12,182
Stockholders’ equity	184,896	178,263	$ 172,114	$ 166,303
Total liabilities and stockholders’ equity	1,256,757	1,233,942
Parent Company [Member]
Assets
Cash and due from banks	46	74
Interest-bearing deposits	503	1,310
Securities available for sale, at fair value		163
Investments in subsidiaries, at equity	184,336	177,150
Refundable income taxes	168	22
Other assets	820	561
Total assets	185,873	179,280
Liabilities and Stockholders’ Equity
Other liabilities	977	1,017
Stockholders’ equity	184,896	178,263
Total liabilities and stockholders’ equity	$ 185,873	$ 179,280

Note 13 - Condensed Financial79

Note 13 - Condensed Financial Statements of Parent Company - Condensed Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income
Realized securities gains, net	$ 14	$ 232	$ 33
Other income	1,148	1,289	1,295
Expenses
Income before income tax benefit and equity in undistributed net income of subsidiaries	20,385	18,894	20,573
Applicable income tax benefit	6,293	3,952	4,740
Net income	14,092	14,942	15,833
Parent Company [Member]
Income
Dividends from subsidiaries	8,141	9,421	7,930
Interest on securities – taxable		2	3
Realized securities gains, net	4
Other income	1,018	987	1,208
Total income	9,163	10,410	9,141
Expenses
Other expenses	1,986	1,992	2,051
Income before income tax benefit and equity in undistributed net income of subsidiaries	7,177	8,418	7,090
Applicable income tax benefit	383	628	210
Income before equity in undistributed net income of subsidiaries	7,560	9,046	7,300
Equity in undistributed net income of subsidiaries	6,532	5,896	8,533
Net income	$ 14,092	$ 14,942	$ 15,833

Note 13 - Condensed Financial80

Note 13 - Condensed Financial Statements of Parent Company - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash Flows from Operating Expenses
Net income	$ 14,092	$ 14,942	$ 15,833
Adjustment to reconcile net income to net cash provided by operating activities:
Amortization of premiums and accretion of discounts, net	58	89	117
Depreciation	805	801	749
Gain on sale of securities	(14)	(232)	(33)
Loss on disposal of fixed assets	(134)		15
Other assets	(2,537)	438	559
Net change in other liabilities	101	(41)	963
Cash Flows from Investing Activities
Net change in interest-bearing deposits	29,035	50,543	(28,263)
Maturities, sales and calls of securities available for sale	13,812	220,581	64,556
Maturities and calls of securities held to maturity	8,975	16,945	9,205
Cash Flows from Financing Activities
Cash dividends paid	(8,141)	(8,071)	(7,930)
Stock options exercised			173
Net change in cash	(1,048)	1,822	(742)
Parent Company [Member]
Cash Flows from Operating Expenses
Net income	14,092	14,942	15,833
Adjustment to reconcile net income to net cash provided by operating activities:
Equity in undistributed net income of subsidiaries	(6,532)	(5,896)	(8,533)
Amortization of premiums and accretion of discounts, net		1	1
Depreciation	0		3
Gain on sale of securities	(4)
Loss on disposal of fixed assets			2
Net change in refundable income taxes due from subsidiaries	(146)	(223)	106
Other assets	(156)	219	(81)
Net change in other liabilities	(40)	(227)	128
Net cash provided by operating activities	7,214	8,816	7,459
Cash Flows from Investing Activities
Net change in interest-bearing deposits	807	(1,140)	307
Maturities, sales and calls of securities available for sale	192
Maturities and calls of securities held to maturity		450	0
Capital distribution to subsidiary	(100)
Net cash provided by (used in) investing activities	899	(690)	307
Cash Flows from Financing Activities
Cash dividends paid	(8,141)	(8,071)	(7,930)
Stock options exercised	0		173
Net cash used in financing activities	(8,141)	(8,071)	(7,757)
Net change in cash	(28)	55	9
Cash due from subsidiaries at beginning of year	74	19	10
Cash due from subsidiaries at end of year	$ 46	$ 74	$ 19

Note 14 - Financial Instrumen81

Note 14 - Financial Instruments With Off-balance Sheet Risk (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Payments for Origination of Mortgage Loans Held-for-sale	$ 13,912	$ 17,090	$ 17,641
Mortgage Loans on Real Estate, Cost of Mortgages Sold	$ 14,130	17,526
Potential Default Period After Sale of Loans to Investor	1 year
Loans Receivable Held-for-sale, Net, Not Part of Disposal Group, Mortgage	$ 260	$ 478
Cash, Uninsured Amount	14
Interest Rate Lock Commitments [Member]
Other Commitment	$ 707

Note 14 - Financial Instrumen82

Note 14 - Financial Instruments with Off-Balance Sheet Risk - Financial Instruments Outstanding Representing Credit Risk (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Commitments to Extend Credit [Member]
Off balance sheet liability, amount	$ 161,222	$ 130,252
Standby Letters of Credit 1 [Member]
Off balance sheet liability, amount	16,351	20,499
Interest Rate Lock Commitments [Member]
Off balance sheet liability, amount	$ 14,130	$ 17,526

Note 15 - Concentrations of C83

Note 15 - Concentrations of Credit Risk (Details Textual) - Credit Concentration Risk [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Commercial Real Estate Loans [Member]
Concentration Risk, Percentage	51.00%	52.00%
Concentration Risk, Credit Risk, Financial Instrument, Maximum Exposure	$ 340,414	$ 336,457
College Housing and Professional Office Buildings [Member]
Concentration Risk, Percentage	37.00%	36.00%
Concentration Risk, Credit Risk, Financial Instrument, Maximum Exposure	$ 247,198	$ 236,552
Residential [Member]
Concentration Risk, Percentage	25.00%	24.00%
Concentration Risk, Credit Risk, Financial Instrument, Maximum Exposure	$ 166,965	$ 157,718

Note 16 - Fair Value Measurem84

Note 16 - Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Loans Held-for-sale [Member] | Changes Measurement [Member] | Fair Value, Measurements, Nonrecurring [Member]
Assets, Fair Value Adjustment	$ 0	$ 0

Note 16 - Fair Value Measurem85

Note 16 - Fair Value Measurements - Assets and Liabilities at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Securities available for sale	$ 331,387	$ 304,282
Fair Value, Inputs, Level 1 [Member]
Securities available for sale	0	0
Fair Value, Inputs, Level 2 [Member]
Securities available for sale	331,387	304,282
Fair Value, Inputs, Level 3 [Member]
Securities available for sale	0	0
US Government Agencies Debt Securities [Member]
Securities available for sale	307,719	285,598
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale	0	0
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale	307,719	285,598
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale	0	0
US States and Political Subdivisions Debt Securities [Member]
Securities available for sale	16,834	11,693
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale	0	0
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale	16,834	11,693
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale	0	0
Collateralized Mortgage Backed Securities [Member]
Securities available for sale	659	930
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale	0	0
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale	659	930
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale	0	0
Corporate Debt Securities [Member]
Securities available for sale	6,175	5,898
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale	0	0
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale	6,175	5,898
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale	$ 0	0
Other Securities [Member]
Securities available for sale		163
Other Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities available for sale		0
Other Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities available for sale		163
Other Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities available for sale		$ 0

Note 16 - Fair Value Measurem86

Note 16 - Fair Value Measurements - Impaired Loans and Other Real Estate Owned Measured at Fair Value on Nonrecurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Impaired loans net of valuation allowance	$ 1,303	$ 878
Other real estate owned net of valuation allowance	2,817	3,156
Fair Value, Inputs, Level 1 [Member]
Impaired loans net of valuation allowance	0	0
Other real estate owned net of valuation allowance	0	0
Fair Value, Inputs, Level 2 [Member]
Impaired loans net of valuation allowance	0	0
Other real estate owned net of valuation allowance	0	0
Fair Value, Inputs, Level 3 [Member]
Impaired loans net of valuation allowance	1,303	878
Other real estate owned net of valuation allowance	$ 2,817	$ 3,156

Note 16 - Fair Value Measurem87

Note 16 - Fair Value Measurements - Level 3 Fair Value Measurements (Details)		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016
Minimum [Member] | Impaired loans [Member] | Present Value of Cash Flows [Member]
Discount rate		5.50%	6.75%
Minimum [Member] | Other Real Estate Owned [Member] | Discounted Appraised Value [Member]
Discount rate		1.68%	0.00%
Selling cost	[1]	2.00%	2.91%
Maximum [Member] | Impaired loans [Member] | Present Value of Cash Flows [Member]
Discount rate		13.25%	8.00%
Maximum [Member] | Other Real Estate Owned [Member] | Discounted Appraised Value [Member]
Discount rate		68.33%	53.46%
Selling cost		6.01%	8.60%
Weighted Average [Member] | Impaired loans [Member] | Present Value of Cash Flows [Member]
Discount rate		5.92%	7.35%
Weighted Average [Member] | Other Real Estate Owned [Member] | Discounted Appraised Value [Member]
Discount rate		11.07%	13.66%
Selling cost		4.72%	6.48%
[1]	The Company markets other real estate owned both independently and with local realtors. Properties marketed by realtors are discounted by selling costs. Properties that the Company markets independently are not discounted by selling costs.

Note 16 - Fair Value Measurem88

Note 16 - Fair Value Measurements - Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Reported Value Measurement [Member]
Financial assets:
Cash and due from banks	$ 12,926	$ 13,974
Interest-bearing deposits	51,233	80,268
Securities	458,551	439,239
Restricted securities	1,200	1,170
Mortgage loans held for sale	260	478
Loans, net	660,144	639,452
Accrued interest receivable	5,297	5,260
Bank-owned life insurance	33,756	22,998
Financial liabilities:
Deposits	1,059,734	1,043,442
Accrued interest payable	62	55
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Financial assets:
Cash and due from banks	12,926	13,974
Interest-bearing deposits	51,233	80,268
Securities	0	0
Restricted securities	0	0
Mortgage loans held for sale		0
Loans, net	0	0
Accrued interest receivable	0	0
Bank-owned life insurance	0	0
Financial liabilities:
Deposits	0	0
Accrued interest payable	0	0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Financial assets:
Cash and due from banks	0	0
Interest-bearing deposits	0	0
Securities	461,500	441,974
Restricted securities	1,200	1,170
Mortgage loans held for sale	260	478
Loans, net	0	0
Accrued interest receivable	5,297	5,260
Bank-owned life insurance	33,756	22,998
Financial liabilities:
Deposits	944,850	912,828
Accrued interest payable	62	55
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member]
Financial assets:
Cash and due from banks	0	0
Interest-bearing deposits	0	0
Securities	0	0
Restricted securities	0	0
Mortgage loans held for sale		0
Loans, net	656,399	658,386
Accrued interest receivable	0	0
Bank-owned life insurance	0	0
Financial liabilities:
Deposits	113,053	128,690
Accrued interest payable	$ 0	$ 0

Note 17 - Components of Accum89

Note 17 - Components of Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Balance	$ 178,263	$ 172,114	$ 166,303
Unrealized holding gain (loss) on available for sale securities, net of tax	546	(800)	(1,064)
Net pension gain (loss) arising during the period, net of tax	213	271	(1,108)
Less amortization of prior service cost included in net periodic pension cost, net of tax	(71)	(72)	(72)
Reclassification of stranded tax effects from change in tax rate
Balance	184,896	178,263	172,114
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Balance	(3,588)	(2,667)	(1,582)
Unrealized holding gain (loss) on available for sale securities, net of tax	546	(800)	(1,064)
Reclassification adjustment, net of tax	(6)	(121)	(21)
Net pension gain (loss) arising during the period, net of tax
Less amortization of prior service cost included in net periodic pension cost, net of tax
Reclassification of stranded tax effects from change in tax rate	(656)
Balance	(3,704)	(3,588)	(2,667)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Balance	(5,071)	(5,270)	(4,090)
Unrealized holding gain (loss) on available for sale securities, net of tax	0
Reclassification adjustment, net of tax		0	0
Net pension gain (loss) arising during the period, net of tax	213	271	(1,108)
Less amortization of prior service cost included in net periodic pension cost, net of tax	(71)	(72)	(72)
Reclassification of stranded tax effects from change in tax rate	(1,062)
Balance	(5,991)	(5,071)	(5,270)
AOCI Attributable to Parent [Member]
Balance	(8,659)	(7,937)	(5,672)
Unrealized holding gain (loss) on available for sale securities, net of tax	546	(800)	(1,064)
Reclassification adjustment, net of tax	(6)	(121)	(21)
Net pension gain (loss) arising during the period, net of tax	213	271	(1,108)
Less amortization of prior service cost included in net periodic pension cost, net of tax	(71)	(72)	(72)
Reclassification of stranded tax effects from change in tax rate	(1,718)
Balance	$ (9,695)	$ (8,659)	$ (7,937)

Note 17 - Components of Accum90

Note 17 - Components of Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Loss (Details) (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net pension gain (loss) arising during the period, taxes	$ 115	$ 132	$ (597)
Less amortization of prior service cost included in net periodic pension cost, tax	(38)	(38)	(38)
Unrealized holding gain (loss) on available for sale securities, tax	(296)	431	571
AOCI Attributable to Parent [Member]
Reclassification adjustment for gain included in net income, taxes	(4)	(65)	(12)
Net pension gain (loss) arising during the period, taxes	115	132	(597)
Less amortization of prior service cost included in net periodic pension cost, tax	(38)	(38)	$ (38)
Unrealized holding gain (loss) on available for sale securities, tax	$ 296	$ (431)

Note 17 - Components of Accum91

Note 17 - Components of Accumulated Other Comprehensive Income (Loss) - Reclassifications Out of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Component of Accumulated Other Comprehensive Income (Loss)
Reclassification adjustment for gain included in net income, tax		$ (4)	$ (65)	$ (12)
Realized gain on available-for-sale securities, net of tax, reclassified out of accumulated other comprehensive income (loss)		(6)	(121)	(21)
Income tax benefit		38	38	38
Amortization of defined benefit pension items, net of tax, reclassified out of accumulated other comprehensive income (loss)		(71)	(72)	(72)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Component of Accumulated Other Comprehensive Income (Loss)
Realized securities gain, net		(10)	(186)	(33)
Reclassification adjustment for gain included in net income, tax		(4)	(65)	(12)
Realized gain on available-for-sale securities, net of tax, reclassified out of accumulated other comprehensive income (loss)		(6)	(121)	(21)
Prior service costs(1)	[1]	(109)	(110)	(110)
Income tax benefit		(38)	(38)	(38)
Amortization of defined benefit pension items, net of tax, reclassified out of accumulated other comprehensive income (loss)		$ (71)	$ (72)	$ (72)
[1]	This accumulated other comprehensive income (loss) component is included in the computation of net periodic benefit cost. (For additional information, see Note 8, "Employee Benefit Plans.")

Note 18 - Intangible Assets a92

Note 18 - Intangible Assets and Goodwill (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill and Intangible Asset Impairment	$ 0	$ 0	$ 0

Note 18 - Intangible Assets a93

Note 18 - Intangible Assets and Goodwill - Schedule of Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Intangible assets, gross carrying value	$ 22,105	$ 22,105
Intangible assets, accumulated amortization	16,207	16,139
Intangible assets, net carrying value	5,898	5,966
Unamortizable goodwill, gross carrying value	5,848	5,848
Unamortizable goodwill, net carrying value	5,848	5,848
Core Deposits [Member]
Intangible assets, gross carrying value	16,257	16,257
Intangible assets, accumulated amortization	16,207	16,139
Intangible assets, net carrying value	$ 50	$ 118

Note 18 - Intangible Assets a94

Note 18 - Intangible Assets and Goodwill - Estimated Amortization Expense of Core Deposit Intangibles (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Total	$ 5,898	$ 5,966
Core Deposits [Member]
2,018	50
Thereafter
Total	$ 50	$ 118