National Bankshares (NKSH) 10-K 11 Mar 15 2014 FY Annual report Financial data

Document_And_Entity_Informatio

Document And Entity Information (USD $)	12 Months Ended
	Dec. 31, 2014	Mar. 11, 2015	Jun. 30, 2014
Document and Entity Information [Abstract]
Entity Registrant Name	NATIONAL BANKSHARES INC
Document Type	10-K
Current Fiscal Year End Date	-19
Entity Common Stock, Shares Outstanding		6,950,474
Entity Public Float			$205,625,494
Amendment Flag	FALSE
Entity Central Index Key	796534
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Accelerated Filer
Entity Well-known Seasoned Issuer	No
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Assets
Cash and due from banks	$12,894	$13,283
Interest-bearing deposits	102,548	98,066
Securities available for sale, at fair value	222,844	181,712
Securities held to maturity (fair value approximates $167,703 at December 31, 2014 and $159,337 at December 31, 2013)	161,452	163,983
Restricted stock	1,089	1,414
Mortgage loans held for sale	291	1,276
Real estate construction loans	45,562	45,925
Consumer real estate loans	147,039	145,499
Commercial real estate loans	310,762	311,266
Commercial non real estate loans	33,413	31,262
Public sector and IDA loans	41,361	34,220
Consumer non real estate loans	28,182	28,423
Total loans	606,319	596,595
Less unearned income and deferred fees	-853	-905
Loans, net of unearned income and deferred fees	605,466	595,690
Less allowance for loan losses	-8,263	-8,227
Loans, net	597,203	587,463
Premises and equipment, net	9,131	9,951
Accrued interest receivable	5,748	5,949
Other real estate owned, net	4,744	4,712
Intangible assets and goodwill	7,223	8,299
Bank-owned life insurance (BOLI)	21,797	21,181
Other assets	7,767	13,341
Total assets	1,154,731	1,110,630
Liabilities and Stockholders’ Equity
Noninterest-bearing demand deposits	150,744	142,645
Interest-bearing demand deposits	533,641	501,541
Savings deposits	81,297	74,141
Time deposits	216,746	241,709
Total deposits	982,428	960,036
Accrued interest payable	68	92
Other liabilities	5,932	4,610
Total liabilities	988,428	964,738
Commitments and contingencies
Preferred stock, no par value, 5,000,000 shares authorized; none issued and outstanding	0	0
Common stock of $1.25 par value. Authorized 10,000,000 shares; issued and outstanding, 6,950,474 shares in 2014 and 6,947,974 in 2013	8,688	8,685
Retained earnings	163,287	154,171
Accumulated other comprehensive loss, net	-5,672	-16,964
Total stockholders’ equity	166,303	145,892
Total liabilities and stockholders’ equity	$1,154,731	$1,110,630

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parentheticals) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Securities held to maturity, fair value (in Dollars)	$167,703	$159,337
Preferred stock, par value (in Dollars per share)	$0	$0
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in Dollars per share)	$1.25	$1.25
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	6,950,474	6,947,974
Common stock, shares outstanding	6,950,474	6,947,974

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Interest Income
Interest and fees on loans	$31,217	$32,819	$35,354
Interest on interest-bearing deposits	262	213	240
Interest on securities – taxable	6,798	6,585	6,460
Interest on securities – nontaxable	5,826	6,388	6,463
Total interest income	44,103	46,005	48,517
Interest Expense
Interest on deposits	4,899	5,955	7,887
Total interest expense	4,899	5,955	7,887
Net interest income	39,204	40,050	40,630
Provision for loan losses	1,641	1,531	3,134
Net interest income after provision for loan losses	37,563	38,519	37,496
Noninterest Income
Service charges on deposit accounts	2,434	2,563	2,594
Other service charges and fees	187	225	243
Credit card fees	3,631	3,330	3,278
Trust income	1,213	1,150	1,313
BOLI income	711	739	814
Other income	868	997	669
Realized securities gains (losses), net	2	-46	60
Total noninterest income	9,046	8,958	8,971
Noninterest Expense
Salaries and employee benefits	11,691	11,978	12,005
Occupancy, furniture and fixtures	1,722	1,616	1,589
Data processing and ATM	1,643	1,700	1,593
FDIC assessment	533	554	475
Credit card processing	2,593	2,546	2,442
Intangible assets amortization	1,075	1,078	1,083
Net costs of other real estate owned	369	296	208
Franchise taxes	1,182	1,083	901
Other operating expenses	3,709	3,519	3,179
Total noninterest expense	24,517	24,370	23,475
Income before income taxes	22,092	23,107	22,992
Income tax expense	5,178	5,317	5,245
Net income	$16,914	$17,790	$17,747
Basic net income per common share (in Dollars per share)	$2.43	$2.56	$2.56
Fully diluted net income per common share (in Dollars per share)	$2.43	$2.55	$2.55

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net Income	$16,914	$17,790	$17,747
Other Comprehensive Income (Loss), Net of Tax
Unrealized holding gains (losses) on available for sale securities net of taxes of $6,693 in 2014, ($8,665) in 2013 and ($323) in 2012	12,430	-16,091	-569
Reclassification adjustment for (gains) losses included in net income, net of taxes of ($1) in 2014, $19 in 2013 and ($16) in 2012	-1	33	-30
Net pension gain (losses) arising during the period, net of taxes of ($574) in 2014, $1,022 in 2013, and ($405) in 2012	-1,066	1,898	-752
Less amortization of prior service cost included in net periodic pension cost, net of taxes of ($39) in 2014, ($35) in 2013, and ($35) in 2012	-71	-66	-66
Other comprehensive income (loss), net of taxes of $6,079 in 2014, ($7,659) in 2013 and ($779) in 2012	11,292	-14,226	-1,417
Total Comprehensive Income	$28,206	$3,564	$16,330

Consolidated_Statements_of_Com1

Consolidated Statements of Comprehensive Income (Parentheticals) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Unrealized holding gains (losses) on available for sale securities, taxes	$6,693	($8,665)	($323)
Reclassification adjustment for (gains) losses included in net income, taxes	-1	19	-16
Net pension gain (losses) arising during the period, taxes	-574	1,022	-405
Less amortization of prior service cost included in net periodic pension cost, taxes	-39	-35	-35
Other comprehensive income (loss), taxes	$6,079	($7,659)	($779)

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Stockholders' Equity (USD $)	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
In Thousands
Balance at Dec. 31, 2011	$8,675	$133,945	($1,321)	$141,299
Net income		17,747		17,747
Other comprehensive income (loss), net of tax			-1,417	-1,417
Cash dividend		-7,639		-7,639
Exercise of stock options	10	109		119
Balance at Dec. 31, 2012	8,685	144,162	-2,738	150,109
Net income		17,790		17,790
Other comprehensive income (loss), net of tax			-14,226	-14,226
Cash dividend		-7,781		-7,781
Balance at Dec. 31, 2013	8,685	154,171	-16,964	145,892
Net income		16,914		16,914
Other comprehensive income (loss), net of tax			11,292	11,292
Cash dividend		-7,853		-7,853
Exercise of stock options	3	55		58
Balance at Dec. 31, 2014	$8,688	$163,287	($5,672)	$166,303

Consolidated_Statements_of_Cha1

Consolidated Statements of Changes in Stockholders' Equity (Parentheticals) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other comprehensive income (loss), tax	$6,079	($7,659)	($779)
Cash dividend	$1.13	$1.12	$1.10

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash Flows from Operating Activities
Net income	$16,914	$17,790	$17,747
Adjustment to reconcile net income to net cash provided by operating activities:
Provision for loan losses	1,641	1,531	3,134
Deferred income tax expense	73	64	204
Depreciation of premises and equipment	732	726	764
Amortization of intangibles	1,075	1,078	1,083
Amortization of premiums and accretion of discounts, net	138	171	224
(Gains) losses on disposal of fixed assets	94	-11	-3
Gains on calls of securities available for sale, net	-2	52	-46
Gains on calls of securities held to maturity, net		-6	-15
(Gains) losses and writedowns on other real estate owned	129	99	-14
Income on investment in BOLI	-616	-658
Originations of mortgage loans held for sale	-9,104	-16,737	-22,747
Sales of mortgage loans held for sale	10,089	18,257	22,574
Net change in:
Accrued interest receivable	201	298	57
Other assets	-574	1,760	-8
Accrued interest payable	-24	-47	-67
Other liabilities	-428	83	-175
Net cash provided by operating activities	20,338	24,450	22,712
Cash Flows from Investing Activities
Net change in interest-bearing deposits	-4,482	-781	1,634
Proceeds from repayments of mortgage-backed securities	902	1,745	3,160
Proceeds from calls and maturities of securities available for sale	11,088	63,886	151,175
Proceeds from calls and maturities of securities held to maturity	8,677	9,738	30,942
Purchases of securities available for sale	-33,905	-83,996	-171,577
Purchases of securities held to maturity	-6,381	-13,484	-47,803
Net change in restricted stock	325	275	-24
Purchases of loan participations	-200	-900	-2,082
Collections of loan participations	1,539	152	1,988
Loan originations and principal collections, net	-13,880	-8,830	-8,182
Proceeds from disposal of other real estate owned	744	854	1,699
Recoveries on loans charged off	255	167	100
Additions to premises and equipment	-459	-276	-769
Proceeds from sale of premises and equipment	453	11
Net cash used in investing activities	-35,324	-31,439	-39,739
Cash Flows from Financing Activities
Net change in time deposits	-24,963	-36,029	-33,333
Net change in other deposits	47,355	49,299	60,766
Cash dividends paid	-7,853	-7,781	-7,639
Stock options exercised	58		119
Net cash provided by financing activities	14,597	5,489	19,913
Net change in cash and due from banks	-389	-1,500	2,886
Cash and due from banks at beginning of year	13,283	14,783	11,897
Cash and due from banks at end of year	12,894	13,283	14,783
Supplemental Disclosures of Cash Flow Information
Interest paid on deposits and borrowed funds	4,923	6,002	7,954
Income taxes paid	5,282	5,145	4,930
Supplemental Disclosures of Noncash Activities
Loans charged against the allowance for loan losses	1,860	1,820	2,953
Loans transferred to other real estate owned	905	4,230	1,631
Unrealized gains (losses) on securities available for sale	19,121	-24,704	-922
Minimum pension liability adjustment	$1,750	$2,819	($1,258)

Note_1_Summary_of_Significant_

Note 1 - Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]	Note 1: Summary of Significant Accounting Policies
	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 significant 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-K was issued.
	Cash and Cash Equivalents
	For purposes of the consolidated statements of cash flows, cash and cash equivalents include cash and 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. As such, 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 classified as held to maturity or trading, including equity securities with readily determinable fair values, are classified as “available for sale” and recorded at fair value, with unrealized gains and losses excluded from earnings and reported in other comprehensive income. Purchase premiums and discounts are recognized in interest income using the interest method over the terms of the securities. Gains and losses on the sale of securities are recorded on the trade date and are determined using the specific identification method.
	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 have the intent to sell a debt security prior to recovery and (b) it is more likely than not that the entity will not have to sell the debt security prior to recovery, the security would not be considered other-than-temporarily impaired, unless there is a credit loss. When criteria (a) and (b) are met, the entity will recognize the credit component of an other-than-temporary impairment of a debt security in earnings and the remaining portion in other comprehensive income. For held-to-maturity debt securities, the amount of an other-than-temporary impairment recorded in other comprehensive income for the noncredit portion of a previous other-than-temporary impairment is amortized prospectively over the remaining life of the security on the basis of the timing of future estimated cash flows of the security.
	For equity securities, when the Company has decided to sell an impaired available-for-sale security and the Company does not expect the fair value of the security to fully recover before the expected time of sale, the security is deemed other-than-temporarily impaired in the period in which the decision to sell is made. The Company recognizes an impairment loss when the impairment is deemed other than temporary even if a decision to sell has not been made.
	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 segments: real estate construction, consumer real estate, commercial real estate, commercial non real estate, public sector and IDA, and consumer non real estate. Each segment is subject to certain risks that influence the establishment of pricing, loan structures, approval requirements, reserves, and ongoing credit management.
	Real estate construction loans are subject to general risks from changing commercial building and housing market trends and economic conditions that may impact demand for completed properties and the costs of completion. Completed properties that do not sell or become leased within originally expected timeframes may impact the borrower’s ability to service the debt. These risks are measured by market-area unemployment rates, bankruptcy rates, housing and commercial building market trends, and interest rates. Risks specific to the borrower are also evaluated, including previous repayment history, debt service ability, and current and projected loan-to value ratios for the collateral.
	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 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, and 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, personal bankruptcy rates and interest rates.
	Risks from delinquency trends and characteristics such as second-lien position and interest-only status, as well as historical charge-off rates, are analyzed for all segments.
	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 and any deferred fees or costs on originated loans. Interest income is accrued on the unpaid principal balance. 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.
	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 days delinquent unless the credit is well secured and in the process of collection. Loans within all loan classes that are not restructured but that are impaired and have an associated impairment loss are placed on nonaccrual unless the borrower is paying as agreed. Restructured loans within all classes that allow the borrower to discontinue payments of principal or interest for more than 90 days are placed on nonaccrual unless the modification provides reasonable assurance of repayment performance and collateral value supports regular underwriting requirements. Restructured loans within all classes that maintain current status for at least six months may be returned to accrual status.
	All interest accrued but not collected for loans of all classes that are placed on nonaccrual or for loans charged off is reversed against interest income. Any interest payments received on nonaccrual loans of all classes are credited to the principal balance of the loan. Loans of all classes that have been designated nonaccrual are returned to accrual status when all the principal and interest amounts contractually due are current; future payments are reasonably assured; and for loans that financed the sale of OREO property, loan-to-value thresholds are met. The Company reviews nonaccrual loans on an individual loan basis to determine whether future payments are reasonably assured. In order for this criteria to be satisfied, the Company’s evaluation must determine that the underlying cause of the original delinquency or weakness that indicated nonaccrual status has been resolved, such as receipt of new guarantees, increased cash flows that cover the debt service or other resolution.
	A loan is considered past due when a payment of principal and/or interest is due but not paid. Credit card payments not received within 30 days after the statement date, real estate loan payments not received within the payment cycle; and all other non-real estate secured loans for which payment is not made within the required payment cycle are considered 30 days past due. Management closely monitors past due loans in timeframes of 30-89 days past due and 90 or more days past due.
	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 collectible, the loss is charged against the allowance. Subsequent recoveries, if any, are credited to the allowance.
	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 according to the contractual terms of the loan agreement. Loan relationships exceeding $250,000 in nonaccrual status or that are significantly past due, or for which a credit review identified weaknesses that indicate principal and interest will not be collected according to the loan terms, as well as all loans modified in a troubled debt restructuring, are designated impaired. This policy is applicable to all loan classes.
	Fair value of impaired loans is estimated in one of three ways: (1) the estimated fair value (less selling costs) of the underlying collateral, (2) the present value of the loan’s expected future cash flows, or (3) the loan’s observable market value. The amount of recorded investment (unpaid principal net of any interest payments made by the borrower during the nonaccrual period and net of any partial charge-offs, accrued interest and deferred fees and costs) in an impaired loan that exceeds the fair value is accrued as estimated loss in the allowance. Impaired loans for which collection of interest or principal is in doubt are placed in nonaccrual status.
	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 later than when the loans are 120-180 days past due, and losses on loans secured by residential real estate or by commercial real estate are charged off by the time the loans reach 180 days past due, in compliance with regulatory guidelines. Accordingly, secured loans may be charged down to the estimated value of the collateral, with previously accrued unpaid interest reversed. Subsequent charge-offs may be required as a result of changes in the market value of collateral or other repayment prospects.
	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 otherwise consider, the related loan is classified as a troubled debt restructuring (TDR). These modified terms may include reduction of the interest rate, extension of the maturity date at an interest rate lower than the current market rate for a new loan with similar risk, forgiveness of principal or accrued interest or other actions intended to minimize the economic loss. TDR loans are individually measured for impairment.
	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 to 60 days. The Company protects itself from changes in interest rates through the use of best efforts forward delivery commitments, by committing to sell a loan at the time the borrower commits to an interest rate with the intent that the buyer has assumed interest rate risk on the loan. As a result, the Company is not exposed to losses nor will it realize significant gains related to its rate lock commitments due to changes in interest rates. The correlation between the rate lock commitments and the best efforts contracts is very high due to their similarity.
	The market value of rate lock commitments and best efforts contracts is not readily ascertainable with precision because rate lock commitments and best effort contracts are not actively traded in stand-alone markets. The Company determines the fair value of rate lock commitments and best efforts contracts by measuring the changes in the value of the underlying assets while taking into consideration the probability that the rate lock commitments will close. Because of the high correlation between rate lock commitments and best efforts contracts, no gain or loss occurs on the rate lock commitments.
	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 years for premises, 3-10 years for furniture and equipment, and 3 years for computer software. Costs of maintenance and repairs are charged to expense as incurred and improvements are capitalized.
	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 cost to sell at the date of foreclosure, establishing a new cost basis. Subsequent to foreclosure, valuations are periodically performed by management and the assets are carried at the lower of carrying amount or fair value less cost 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. Impairment testing is performed annually, as well as when an event triggering impairment may have occurred. The Company performs its annual analysis as of September 30 of each fiscal year. Accounting guidance permits preliminary assessment of qualitative factors to determine whether more substantial impairment testing is required. The Company chose to bypass the preliminary assessment and utilized a two-step process for impairment testing of goodwill. The first step tests for impairment, while the second step, if necessary, measures the impairment. No indicators of impairment were identified during the years ended December 31, 2014, 2013 and 2012.
	Intangible assets include customer deposit intangibles. Such intangible assets are amortized on a straight-line basis over their estimated useful lives, which are generally ten to twelve years.
	Goodwill is subject to at least an annual assessment for impairment by applying a fair value based test. The Company performs impairment testing in the fourth quarter. Accounting guidance provides the option of performing preliminary assessment of qualitative factors before performing more substantial testing for impairment. The Company opted not to perform the preliminary assessment. The Company’s goodwill impairment analysis considered three valuation techniques appropriate to the measurement. The first technique uses the Company’s market capitalization as an estimate of fair value; the second technique estimates fair value using current market pricing multiples for companies comparable to NBI; while the third technique uses current market pricing multiples for change-of-control transactions involving companies comparable to NBI. Each measure indicated that the Company’s fair value exceeded its book value, validating that goodwill is not impaired.
	Certain key judgments were used in the valuation measurement. Goodwill is held by the Company’s bank subsidiary. The bank subsidiary is 100% owned by the Company, and no market capitalization is available. Because most of the Company’s assets are comprised of the subsidiary bank’s equity, the Company’s market capitalization was used to estimate the Bank’s market capitalization. Other judgments include the assumption that the companies and transactions used as comparables for the second and third technique were appropriate to the estimate of the Company’s fair value, and that the comparable multiples are appropriate indicators of fair value, and compliant with accounting guidance.
	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 intangible assets arising from branch transactions over their useful life. Core deposit intangibles are subject to a recoverability test based on undiscounted cash flows, and to the impairment recognition and measurement provisions required for other long-lived assets held and used. The impairment testing showed that the expected cash flows of the intangible assets exceeded the carrying value.
	Stock-Based Compensation
	The Company’s 1999 Stock Option Plan terminated on March 9, 2009. Incentive stock options, all of which are now vested, were granted in the early years of the Plan. The Company recognized the cost of employment services received in exchange for awards of equity instruments based on the fair value of those awards on the date of grant. Compensation cost was recognized over the award’s required service period, which was the vesting period.
	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 components of income tax expense: current and deferred. Current income tax expense reflects taxes to be paid or refunded for the current period by applying the provisions of the enacted tax law to the taxable income or excess of deductions over revenues. The Company determines deferred income taxes using the liability (or balance sheet) method. Under this method, the net deferred tax asset or liability is based on the tax effects of the differences between the book and tax bases of assets and liabilities, and enacted changes in tax rates and laws are recognized in the period in which they occur.
	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, based on the technical merits, that the tax position will be realized or sustained upon examination. The term more likely than not means a likelihood of more than 50 percent; the terms examined and upon examination also include resolution of the related appeals or litigation processes, if any. A tax position that meets the more-likely-than-not recognition threshold is initially and subsequently measured as the largest amount of tax benefit that has a greater than 50 percent likelihood of being realized upon settlement with a taxing authority that has full knowledge of all relevant information. The determination of whether or not a tax position has met the more-likely-than-not recognition threshold considers the facts, circumstances, and information available at the reporting date and is subject to management’s judgment. Deferred tax assets are reduced by a valuation allowance if, based on the weight of evidence available, it is more likely than not that some portion or all of a deferred tax asset will not be realized.
	The Company recognizes interest and penalties on income taxes as a component of income tax expense.
	Trust Assets and Income
	Assets (other than cash deposits) held by the Trust Department in a fiduciary or agency capacity for customers are not included in the consolidated financial statements since such items are not assets of the Company. Trust income is recognized on the accrual basis.
	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 be issued by the Company relate solely to outstanding stock options and are determined using the treasury stock method.
	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 dilutive potential common stock.
		2014		2013		2012
Average number of common shares outstanding		6,948,789		6,947,974		6,942,411
Effect of dilutive options		10,345		20,419		17,456
Average number of common shares outstanding used to calculate diluted earnings per common share		6,959,134		6,968,393		6,959,867
The computation of diluted net income per common share excludes shares for stock options that would be anti-dilutive. There were no anti-dilutive shares in 2014, 2013 or 2012.
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 reasonable estimated. Management does not believe there are such matters that will have a material effect on the financial statements.
Advertising
The Company practices the policy of charging advertising costs to expenses as incurred. In 2014, the Company charged $174 to expenses, and in 2013, $194 and in 2012, $169 was expensed.
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 and deferred tax assets, other-than-temporary impairments of securities, evaluation of impairment of goodwill and other intangibles, 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 also affect the valuation of real estate acquired in connection with foreclosures or in satisfaction of loans.
Certain reclassifications have been made to prior period balances to conform to the current year provisions.
Recent Accounting Pronouncements
In January 2014, the FASB issued ASU 2014-01, “Investments—Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Qualified Affordable Housing Projects (a consensus of the FASB Emerging Issues Task Force).” The amendments in this ASU permit reporting entities to make an accounting policy election to account for their investments in qualified affordable housing projects using the proportional amortization method if certain conditions are met. Under the proportional amortization method, an entity amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the income statement as a component of income tax expense (benefit). The amendments in this ASU should be applied retrospectively to all periods presented. A reporting entity that uses the effective yield method to account for its investments in qualified affordable housing projects before the date of adoption may continue to apply the effective yield method for those preexisting investments. The amendments in this ASU are effective for public business entities for annual periods and interim reporting periods within those annual periods, beginning after December 15, 2014. Early adoption is permitted. The Company is currently assessing the impact that ASU 2014-01 will have on its consolidated financial statements.
In January 2014, the FASB issued ASU 2014-04, “Receivables—Troubled Debt Restructurings by Creditors (Subtopic 310-40): Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure (a consensus of the FASB Emerging Issues Task Force).” The amendments in this ASU clarify that an in substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either (1) the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or (2) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Additionally, the amendments require interim and annual disclosure of both (1) the amount of foreclosed residential real estate property held by the creditor and (2) the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure according to local requirements of the applicable jurisdiction. The amendments in this ASU are effective for public business entities for annual periods, and interim periods within those annual periods, beginning after December 15, 2014. The Company is currently assessing the impact that ASU 2014-04 will have on its consolidated financial statements.
In June 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers: Topic 606.” This ASU applies to any entity using U.S. GAAP that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of nonfinancial assets unless those contracts are within the scope of other standards. The guidance supersedes the revenue recognition requirements in Topic 605, “Revenue Recognition, most industry-specific guidance, and some cost guidance included in Subtopic 605-35, “Revenue Recognition—Construction-Type and Production-Type Contracts.” The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To be in alignment with the core principle, an entity must apply a five step process including: identification of the contract(s) with a customer, identification of performance obligations in the contract(s), determination of the transaction price, allocation of the transaction price to the performance obligations, and recognition of revenue when (or as) the entity satisfies a performance obligation. Additionally, the existing requirements for the recognition of a gain or loss on the transfer of nonfinancial assets that are not in a contract with a customer have also been amended to be consistent with the guidance on recognition and measurement. The amendments in this ASU are effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Early adoption is not permitted. The Company is currently assessing the impact that ASU 2014-09 will have on its consolidated financial statements.
In June 2014, the FASB issued ASU No. 2014-11, “Transfers and Servicing (Topic 860): Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures.” This ASU aligns the accounting for repurchase-to-maturity transactions and repurchase agreements executed as a repurchase financing with the accounting for other typical repurchase agreements. The new guidance eliminates sale accounting for repurchase-to-maturity transactions and supersedes the guidance under which a transfer of a financial asset and a contemporaneous repurchase financing could be accounted for on a combined basis as a forward agreement. The amendments in the ASU also require a new disclosure for transactions economically similar to repurchase agreements in which the transferor retains substantially all of the exposure to the economic return on the transferred financial assets throughout the term of the transaction. Additional disclosures will be required for the nature of collateral pledged in repurchase agreements and similar transactions accounted for as secured borrowings. The amendments in this ASU are effective for the first interim or annual period beginning after December 15, 2014; however, the disclosure for transactions accounted for as secured borrowings is required to be presented for annual periods beginning after December 15, 2014, and interim periods beginning after March 15, 2015. Early adoption is not permitted. The Company is currently assessing the impact that ASU 2014-11 will have on its consolidated financial statements.
In June 2014, the FASB issued ASU No. 2014-12, “Compensation – Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period.” The new guidance applies to reporting entities that grant employees share-based payments in which the terms of the award allow a performance target to be achieved after the requisite service period. The amendments in the ASU require that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. Existing guidance in “Compensation – Stock Compensation (Topic 718),” should be applied to account for these types of awards. The amendments in this ASU are effective for annual periods and interim periods within those annual periods beginning after December 15, 2015. Early adoption is permitted and reporting entities may choose to apply the amendments in the ASU either on a prospective or retrospective basis. The Company is currently assessing the impact that ASU 2014-12 will have on its consolidated financial statements.
In August 2014, the FASB issued ASU No. 2014-14, “Receivables – Troubled Debt Restructurings by Creditors (Subtopic 310-40): Classification of Certain Government-Guaranteed Mortgage Loans upon Foreclosure.” The amendments in this ASU apply to creditors that hold government-guaranteed mortgage loans and are intended to eliminate the diversity in practice related to the classification of these guaranteed loans upon foreclosure. The new guidance stipulates that a mortgage loan be derecognized and a separate other receivable be recognized upon foreclosure if (1) the loan has a government guarantee that is not separable from the loan prior to foreclosure, (2) at the time of foreclosure, the creditor has the intent to convey the real estate property to the guarantor and make a claim on the guarantee, and the creditor has the ability to recover under that claim, and (3) at the time of foreclosure, any amount of the claim that is determined on the basis of the fair value of the real estate is fixed. Upon foreclosure, the other receivable should be measured on the amount of the loan balance (principal and interest) expected to be recovered from the guarantor. The amendments in this ASU are effective for annual periods and interim periods within those annual periods beginning after December 15, 2014. Entities may adopt the amendments on a prospective basis or modified retrospective basis as of the beginning of the annual period of adoption; however, the entity must apply the same method of transition as elected under ASU 2014-04. Early adoption is permitted provided the entity has already adopted ASU 2014-04. The Company is currently assessing the impact that ASU 2014-14 will have on its consolidated financial statements.
In August 2014, the FASB issued ASU No. 2014-15, “Presentation of Financial Statements – Going Concern (Subtopic 205-40): Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern.” This update is intended to provide guidance about management’s responsibility to evaluate whether there is substantial doubt about an entity’s ability to continue as a going concern and to provide related footnote disclosures. Management is required under the new guidance to evaluate whether there are conditions or events, considered in the aggregate, that raise substantial doubt about the entity’s ability to continue as a going concern within one year after the date the financial statements are issued when preparing financial statements for each interim and annual reporting period. If conditions or events are identified, the ASU specifies the process that must be followed by management and also clarifies the timing and content of going concern footnote disclosures in order to reduce diversity in practice. The amendments in this ASU are effective for annual periods and interim periods within those annual periods beginning after December 15, 2016. Early adoption is permitted. The Company does not expect the adoption of ASU 2014-15 to have a material impact on its consolidated financial statements.
In November 2014, the FASB issued ASU No. 2014-16, “Derivatives and Hedging (Topic 815): Determining Whether the Host Contract in a Hybrid Financial Instrument Issued in the Form of a Share Is More Akin to Debt or to Equity.” The amendments in ASU do not change the current criteria in U.S. GAAP for determining when separation of certain embedded derivative features in a hybrid financial instrument is required. The amendments clarify how current U.S. GAAP should be interpreted in evaluating the economic characteristics and risks of a host contract in a hybrid financial instrument that is issued in the form of a share. Specifically, the amendments clarify that an entity should consider all relevant terms and features, including the embedded derivative feature being evaluated for bifurcation, in evaluating the nature of the host contract. Furthermore, the amendments clarify that no single term or feature would necessarily determine the economic characteristics and risks of the host contract. Rather, the nature of the host contract depends upon the economic characteristics and risks of the entire hybrid financial instrument. The amendments in this ASU also clarify that, in evaluating the nature of a host contract, an entity should assess the substance of the relevant terms and features (i.e., the relative strength of the debt-like or equity-like terms and features given the facts and circumstances) when considering how to weight those terms and features. The amendments in this ASU are effective for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. Early adoption, including adoption in an interim period, is permitted. The Company does not expect the adoption of ASU 2014-16 to have a material impact on its consolidated financial statements.
In November 2014, the FASB issued ASU No. 2014-17, “Business Combinations (Topic 805): Pushdown Accounting.” The amendments in ASU provide an acquired entity with an option to apply pushdown accounting in its separate financial statements upon occurrence of an event in which an acquirer obtains control of the acquired entity. An acquired entity may elect the option to apply pushdown accounting in the reporting period in which the change-in-control event occurs. An acquired entity should determine whether to elect to apply pushdown accounting for each individual change-in-control event in which an acquirer obtains control of the acquired entity. If pushdown accounting is not applied in the reporting period in which the change-in-control event occurs, an acquired entity will have the option to elect to apply pushdown accounting in a subsequent reporting period to the acquired entity’s most recent change-in-control event. An election to apply pushdown accounting in a reporting period after the reporting period in which the change-in-control event occurred should be considered a change in accounting principle in accordance with Topic 250, Accounting Changes and Error Corrections. If pushdown accounting is applied to an individual change-in-control event, that election is irrevocable. The amendments in this ASU are effective on November 18, 2014. After the effective date, an acquired entity can make an election to apply the guidance to future change-in-control events or to its most recent change-in-control event. However, if the financial statements for the period in which the most recent change-in-control event occurred already have been issued or made available to be issued, the application of this guidance would be a change in accounting principle. The Company does not expect the adoption of ASU 2014-17 to have a material impact on its consolidated financial statements.
In January 2015, the FASB issued ASU No. 2015-01, “Income Statement—Extraordinary and Unusual Items (Subtopic 225-20): Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items.” The amendments in this ASU eliminate from U.S. GAAP the concept of extraordinary items. Subtopic 225-20, Income Statement - Extraordinary and Unusual Items, required that an entity separately classify, present, and disclose extraordinary events and transactions. Presently, an event or transaction is presumed to be an ordinary and usual activity of the reporting entity unless evidence clearly supports its classification as an extraordinary item. If an event or transaction meets the criteria for extraordinary classification, an entity is required to segregate the extraordinary item from the results of ordinary operations and show the item separately in the income statement, net of tax, after income from continuing operations. The entity also is required to disclose applicable income taxes and either present or disclose earnings-per-share data applicable to the extraordinary item. The amendments in this ASU are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. Early adoption is permitted provided that the guidance is applied from the beginning of the fiscal year of adoption. The Company does not expect the adoption of ASU 2015-01 to have a material impact on its consolidated financial statements.

Note_2_Restriction_on_Cash

Note 2 - Restriction on Cash	12 Months Ended
	Dec. 31, 2014
Cash and Cash Equivalents [Abstract]
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 require member banks to hold an average balance in order to purchase services from the Federal Reserve.

Note_3_Securities

Note 3 - Securities	12 Months Ended
	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
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:
		31-Dec-14
	Available for sale:	Amortized		Gross		Gross		Fair Value
		Cost		Unrealized		Unrealized
				Gains		Losses
	U.S. Government agencies and corporations		197,740		973		4,494		194,219
	States and political subdivisions		18,529		851		---		19,380
	Mortgage-backed securities		1,830		184		---		2,014
	Corporate debt securities		6,991		140		27		7,104
	Other securities		189		---		62		127
	Total securities available for sale	$	225,279	$	2,148	$	4,583	$	222,844
		31-Dec-13
	Available for sale:	Amortized		Gross		Gross		Fair Value
		Cost		Unrealized		Unrealized
				Gains		Losses
	U.S. Government agencies and corporations		169,818		199		22,163		147,854
	States and political subdivisions		22,830		746		120		23,456
	Mortgage-backed securities		2,627		213		----		2,840
	Corporate debt securities		7,804		97		506		7,395
	Other securities		189		---		22		167
	Total securities available for sale	$	203,268	$	1,255	$	22,811	$	181,712
	The amortized cost and fair value of single maturity securities available for sale at December 31, 2014, by contractual maturity, are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Mortgage-backed securities included in these totals are categorized by final maturity at December 31, 2014.
		31-Dec-14
		Amortized Cost		Fair Value
	Due in one year or less	$	1,864	$	1,899
	Due after one year through five years		30,930		31,171
	Due after five years through ten years		30,161		30,156
	Due after ten years		162,135		159,491
	No maturity		189		127
		$	225,279	$	222,844
	The Company holds restricted stock with the Federal Home Loan Bank and the Federal Reserve. Required ownership amounts are determined by the correspondent banks and the Company purchases stock from or sells stock back to the correspondents based on their calculations. The stock is held by member institutions only and is not actively traded. The Company held restricted stock of $1,089 as of December 31, 2014 and $1,414 as of December 31, 2013.
	The amortized cost and fair value of securities held to maturity, with gross unrealized gains and losses, follows:
		31-Dec-14
	Held to maturity:	Amortized		Gross		Gross		Fair Value
		Cost		Unrealized		Unrealized
				Gains		Losses
	U.S. Government agencies and corporations	$	18,922	$	350	$	245	$	19,027
	States and political subdivisions		140,702		6,823		727		146,798
	Mortgage-backed securities		415		51		---		466
	Corporate debt securities		1,413		1		2		1,412
	Total securities held to maturity	$	161,452	$	7,225	$	974	$	167,703
		31-Dec-13
	Held to maturity:	Amortized		Gross		Gross		Fair Value
		Cost		Unrealized		Unrealized
				Gains		Losses
	U.S. Government agencies and corporations	$	13,973	$	280	$	1,448	$	12,805
	States and political subdivisions		149,490		2,971		6,502		145,959
	Mortgage-backed securities		520		53		---		573
	Total securities held to maturity	$	163,983	$	3,304	$	7,950	$	159,337
	The amortized cost and fair value of single maturity securities held to maturity at December 31, 2014, by contractual maturity, are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. Mortgage-backed securities included in these totals are categorized by final maturity at December 31, 2014.
		31-Dec-14
		Amortized		Fair
		Cost		Value
	Due in one year or less	$	1,637	$	1,650
	Due after one year through five years		4,987		5,262
	Due after five years through ten years		24,052		25,181
	Due after ten years		130,776		135,610
		$	161,452	$	167,703
	Information pertaining to securities with gross unrealized losses at December 31, 2014 and 2013 aggregated by investment category and length of time that individual securities have been in a continuous loss position, follows:
		31-Dec-14
		Less Than 12 Months				12 Months or More
		Fair		Unrealized		Fair		Unrealized
		Value		Loss		Value		Loss
U. S. Government agencies and corporations	$	6,964	$	30	$	156,149	$	4,709
State and political subdivisions		1,222		35		19,818		692
Corporate debt securities		450		2		1,948		27
Other securities		---		---		127		62
Total temporarily impaired securities	$	8,636	$	67	$	178,042	$	5,490
	31-Dec-13
	Less Than 12 Months				12 Months or More
	Fair		Unrealized		Fair		Unrealized
	Value		Loss		Value		Loss
U. S. Government agencies and corporations	$	138,324	$	20,400	$	15,796	$	3,211
State and political subdivisions		58,013		6,131		2,697		491
Corporate debt securities		5,511		506		---		---
Other securities		167		22		---		---
Total temporarily impaired securities	$	202,015	$	27,059	$	18,493	$	3,702
At December 31, 2014, the Company had 205 securities with a fair value of $186,678 which had total unrealized losses of $5,557. The Company has made the determination that these securities are temporarily impaired at December 31, 2014 for the following reasons:
U.S. Government agencies and corporations. The unrealized losses in this category of investments were caused by interest rate fluctuations. The contractual terms of the investments do not permit the issuer to settle the securities at a price less than the cost basis of each investment. Because the Company does not intend to sell any of the investments and the accounting standard of “more likely than not” has not been met for the Company to be required to sell any of these investments before recovery of its amortized cost basis, which may be maturity, the Company does not consider these investments to be other-than-temporarily impaired.
State and political subdivisions. This category’s unrealized losses are primarily the result of interest rate fluctuations and also a certain few ratings downgrades brought about by the impact of the economic downturn on states and political subdivisions. The securities remain investment grade and the Company’s analysis did not indicate the existence of a credit loss. The contractual terms of the investments do not permit the issuer to settle the securities at a price less than the cost basis of each investment. Because the Company does not intend to sell any of the investments and the accounting standard of “more likely than not” has not been met for the Company to be required to sell any of the investments before recovery of its amortized cost basis, which may be maturity, the Company does not consider these investments to be other-than-temporarily impaired.
Corporate debt securities. The Company’s unrealized losses in corporate debt securities are related to both interest rate fluctuations and ratings downgrades for a limited number of securities. The securities remain investment grade and the Company’s analysis did not indicate the existence of a credit loss. The contractual terms of the investments do not permit the issuer to settle the securities at a price less than the cost basis of each investment. Because the Company does not intend to sell any of the investments before recovery of its amortized cost basis, which may be maturity, the Company does not consider these investments to be other-than-temporarily impaired.
Other. The Company holds an investment in a small amount of community bank stock. The value of the investment has been negatively affected by market conditions. Because the Company does not intend to sell the investment before recovery of amortized cost basis, the Company does not consider these investments to be other-than-temporarily impaired.
At December 31, 2013, the Company had 286 securities with a fair value of $220,508 which were temporarily impaired. The total unrealized loss on these securities, which was attributed to interest rate fluctuations, was $30,761. Because the Company had the ability and intent to hold the securities until maturity or until the cost was recovered, the losses associated with the securities were not considered other than temporary at December 31, 2013.
At December 31, 2014 and 2013, securities with a carrying value of $157,951 and $139,873, respectively, were pledged to secure trust deposits and for other purposes as required or permitted by law.
As a member of the Federal Reserve and the Federal Home Loan Bank (“FHLB”) of Atlanta, NBB is required to maintain certain minimum investments in the common stock of those entities. Required levels of investment are based upon NBB’s capital and a percentage of qualifying assets. In addition, NBB is eligible to borrow from the FHLB with borrowings collateralized by qualifying assets, primarily residential mortgage loans totaling approximately $437,847, and NBB’s capital stock investment in the FHLB. Redemption of FHLB stock is subject to certain limitations and conditions. At its discretion, the FHLB may declare dividends on the stock. Management reviews for impairment based upon the ultimate recoverability of the cost basis in the FHLB stock.

Note_4_Related_Party_Transacti

Note 4 - Related Party Transactions	12 Months Ended
	Dec. 31, 2014
Related Party Transactions [Abstract]
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 executive officers and directors of Bankshares and its subsidiaries amounting to $2,708 at December 31, 2014 and $2,913 at December 31, 2013. During the year ended December 31, 2014, total principal additions were $1,766 and principal payments were $1,971.

Note_5_Allowance_for_Loan_Loss

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans	12 Months Ended
	Dec. 31, 2014
Receivables [Abstract]
Loans, Notes, Trade and Other Receivables Disclosure [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 are those loans that have been modified in a troubled debt restructure (“TDR” or “restructure”) and larger, non-homogeneous loans that are in nonaccrual or exhibit payment history or financial status that indicate the probability that collection will not occur according to the loan’s terms. Generally, impaired loans are given risk ratings that indicate higher risk, such as “classified” or “other assets especially mentioned.” Impaired loans are individually evaluated to determine appropriate reserves and are measured at the lower of the invested amount or the fair market value.
	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. Further, restructured loans are individually evaluated for impairment, with amounts below fair value accrued 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 included 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 collateral dependent may be accrued in the allowance for loan losses or charged off if deemed uncollectible.
	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
	Beginning January 1, 2013, the Company segregated certain loans that were included within the classes of the Residential Real Estate segment, including Equity lines, Residential closed-end first liens and Residential closed-end junior liens. The loans segregated in 2013 are secured by residential real estate collateral that is owned by investors and for which the primary repayment source is rental income. The new class in the Residential Real Estate segment allows the Company to address credit risks characteristic of investor-owned residential real estate. Segregating the investor-owned residential real estate did not have a significant impact on the calculation of the allowance for loan losses. Consistent with accounting guidance, prior periods have not been restated and are shown as originally published using the segments and classes in effect for the period.
	The segments and classes used in determining the allowance for loan losses, beginning in 2013 are as follows.
	Real Estate Construction	Commercial Non Real Estate
	Construction, residential	Commercial and Industrial
	Construction, other
		Public Sector and IDA
	Consumer Real Estate	Public sector and IDA
	Equity lines
	Residential closed-end first liens	Consumer Non Real Estate
	Residential closed-end junior liens	Credit cards
	Investor-owned residential real estate	Automobile
		Other consumer loans
	Commercial Real Estate
	Multifamily real estate
	Commercial real estate, owner-occupied
	Commercial real estate, other
	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 annualized current-year loss rate is averaged with that of prior periods to obtain the historical loss rate. Prior to the first quarter of 2013, one historical loss rate for each class was calculated and applied to current class balance to obtain the allocation for historical loss rates.
	Beginning with the first quarter of 2013, 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. Consistent with accounting guidance, prior periods have not been restated and are shown as originally published using the methodology in effect for the period.
	Risk Factors
	In addition to historical loss rates, risk factors pertinent to 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 and loan officers’ experience. Prior to the first quarter of 2013, management also reviewed the Company’s lending policies and loan review system to determine whether changes had occurred during the quarter that affected credit risk. Until the first quarter of 2013, no changes were found to affect credit risk and no additional allocations were applied. During the first quarter of 2013, the Company incorporated to the allowance methodology a factor for changes in the Company’s lending policies and a factor for changes in the quality of the Company’s loan review, and set standard allocations for associated risk. The addition of the factors formalized and standardized a practice already in place and did not have a significant impact on the calculation of the allowance for loan losses.
	The analysis of certain factors results in standard allocations to all segments and classes. These factors include loan officers’ average years of experience, the risk from changes in lending policies, the risk from changes in loan review, unemployment rates, bankruptcy rates, and competition. Factors analyzed for each class, with resultant allocations based upon the level of risk assessed for each class, include levels of past due loans, 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: Summary of Significant Accounting Policies for a discussion of risk factors pertinent to each class.
	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, determined to be junior lien mortgages, high loan-to-value loans and interest-only loans.
	An analysis of the allowance for loan losses follows:
			Years ended December 31,
			2014			2013			2012
	Balance at beginning of year		$	8,227		$	8,349		$	8,068
	Loans charged off			(1,860	)		(1,820	)		(2,953	)
	Recoveries of loans previously charged off			255			167			100
	Provision for loan losses			1,641			1,531			3,134
	Balance at end of year		$	8,263		$	8,227		$	8,349
	A detailed analysis showing the allowance roll-forward by portfolio segment and related loan balance by segment follows:
			Activity in the Allowance for Loan Losses by Segment for the year ended December 31, 2014
			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, 2013		$	863		$	1,697		$	3,685		$	989		$	132		$	576		$	285		$	8,227
	Charge-offs			(2	)		(222	)		(1,201	)		(89	)		---			(346	)		---			(1,860	)
	Recoveries			---			---			50			132			---			73			---			255
	Provision for loan losses			(249	)		187			1,003			443			195			299			(237	)		1,641
	Balance, December 31, 2014		$	612		$	1,662		$	3,537		$	1,475		$	327		$	602		$	48		$	8,263
			Activity in the Allowance for Loan Losses by Segment for the year ended December 31, 2013
			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, 2012		$	1,070		$	2,263		$	3,442		$	959		$	142		$	424		$	49		$	8,349
	Charge-offs			(184	)		(256	)		(64	)		(968	)		---			(348	)		---			(1,820	)
	Recoveries			44			1			25			18			---			79			---			167
	Provision for loan losses			(67	)		(311	)		282			980			(10	)		421			236			1,531
	Balance, December 31, 2013		$	863		$	1,697		$	3,685		$	989		$	132		$	576		$	285		$	8,227
			Activity in the Allowance for Loan Losses by Segment for the year ended December 31, 2012
			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, 2011		$	1,079		$	1,245		$	3,515		$	1,473		$	232		$	403		$	121		$	8,068
	Charge-offs			(640	)		(370	)		(1,589	)		(109	)		---			(245	)		---			(2,953	)
	Recoveries			13			8			---			2			---			77			---			100
	Provision for loan losses			618			1,380			1,516			(407	)		(90	)		189			(72	)		3,134
	Balance, December 31, 2012		$	1,070		$	2,263		$	3,442		$	959		$	142		$	424		$	49		$	8,349
			Allowance for Loan Losses by Segment and Evaluation Method as of
			31-Dec-14
			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		$	---		$	14		$	258		$	10		$	---		$	---		$	---		$	282
	Collectively evaluated for impairment			612			1,648			3,279			1,465			327			602			48			7,981
Total		$	612		$	1,662		$	3,537		$	1,475		$	327		$	602		$	48		$	8,263
		Loans by Segment and Evaluation Method as of
		31-Dec-14
		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		$	---		$	819		$	13,624		$	678		$	---		$	---		$	---		$	15,121
Collectively evaluated for impairment			45,562			146,220			297,138			32,735			41,361			28,182			---			591,198
Total		$	45,562		$	147,039		$	310,762		$	33,413		$	41,361		$	28,182		$	---		$	606,319
		Allowance for Loan Losses by Segment and Evaluation Method as of
		31-Dec-13
		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		$	---		$	10		$	610		$	4		$	---		$	---		$	---		$	624
Collectively evaluated for impairment			863			1,687			3,075			985			132			576			285			7,603
Total		$	863		$	1,697		$	3,685		$	989		$	132		$	576		$	285		$	8,227
		Loans by Segment and Evaluation Method as of
		31-Dec-13
		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		$	---		$	780		$	12,079		$	102		$	---		$	24		$	---		$	12,985
Collectively evaluated for impairment			45,925			144,719			299,187			31,160			34,220			28,399			---			583,610
Total		$	45,925		$	145,499		$	311,266		$	31,262		$	34,220		$	28,423		$	---		$	596,595
A summary of ratios for the allowance for loan losses follows:
		December 31,
		2014			2013
Ratio of allowance for loan losses to the end of period loans, net of unearned income and deferred fees			1.36	%		1.38	%
Ratio of net charge-offs to average loans, net of unearned income and deferred fees			0.27	%		0.28	%
A summary of nonperforming assets follows:
		December 31,
		2014			2013
Nonperforming assets:
Nonaccrual loans		$	3,999		$	5,732
Restructured loans in nonaccrual			5,288			852
Total nonperforming loans			9,287			6,584
Other real estate owned, net			4,744			4,712
Total nonperforming assets		$	14,031		$	11,296
Ratio of nonperforming assets to loans, net of unearned income and deferred fees, plus other real estate owned			2.3	%		1.88	%
Ratio of allowance for loan losses to nonperforming loans(1)			88.97	%		124.95	%
	-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.
A summary of loans past due 90 days or more and impaired loans follows:
		December 31,
		2014			2013
Loans past due 90 days or more and still accruing		$	207		$	190
Ratio of loans past due 90 days or more and still accruing to loans, net of unearned income and deferred fees			0.03	%		0.03	%
Accruing restructured loans		$	6,040		$	6,191
Impaired loans:
Impaired loans with no valuation allowance		$	7,615		$	10,372
Impaired loans with a valuation allowance			7,506			2,613
Total impaired loans			15,121			12,985
Valuation allowance			(282	)		(624	)
Impaired loans, net of allowance		$	14,839		$	12,361
Average recorded investment in impaired loans(1)		$	16,311		$	16,654
Income recognized on impaired loans, after designation as impaired		$	473		$	267
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 interest income was recognized on nonaccrual loans for the years ended December 31, 2014, 2013 or 2012. Nonaccrual loans that meet the Company’s balance thresholds are designated as impaired.
A detailed analysis of investment in impaired loans, associated reserves and interest income recognized, by loan class follows:
		Impaired Loans as of December 31, 2014
		Principal Balance			(A)			Recorded Investment(1) in (A) for Which There is No Related Allowance			Recorded Investment(1) in (A) for Which There is a Related Allowance			Related Allowance
					Total Recorded Investment(1)
Consumer Real Estate(2)
Residential closed-end first liens			530			503			311			192			2
Residential closed-end junior liens			239			239			---			239			8
Investor-owned residential real estate			77			77			---			77			4
Commercial Real Estate(2)
Multifamily real estate			2,911			2,735			868			1,866			170
Commercial real estate, owner occupied			4,919			4,821			3,314			1,508			74
Commercial real estate, other			6,080			6,068			3,072			2,996			14
Commercial Non Real Estate(2)
Commercial and Industrial			678			678			50			628			10
Total		$	15,434		$	15,121		$	7,615		$	7,506		$	282
		Impaired Loans as of December 31, 2013
		Principal Balance			(A)			Recorded Investment(1) in (A) for Which There is No Related Allowance			Recorded Investment(1) in (A) for Which There is a Related Allowance			Related Allowance
					Total Recorded Investment(1)
Consumer Real Estate(2)
Residential closed-end first liens			440			442			232			210			3
Residential closed-end junior liens			259			261			---			261			7
Investor-owned residential real estate			81			82			82			---			---
Commercial Real Estate(2)
Multifamily real estate			3,278			3,274			3,274			---			---
Commercial real estate, owner occupied			5,643			5,645			3,864			1,781			610
Commercial real estate, other			3,158			3,158			3,158			---			---
Commercial Non Real Estate(2)
Commercial and Industrial			102			103			1			102			4
Consumer Non Real Estate(2)
Automobile			24			24			24			---			---
Total		$	12,985		$	12,989		$	10,635		$	2,354		$	624
	-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
		31-Dec-14
		Average Recorded Investment(1)			Interest Income Recognized
Consumer Real Estate(2)
Residential closed-end first liens			555			31
Residential closed-end junior liens			249			16
Investor-owned residential real estate			77			5
Commercial Real Estate(2)
Multifamily real estate			2,773			---
Commercial real estate, owner occupied			5,836			203
Commercial real estate, other			6,114			175
Commercial Non Real Estate(2)
Commercial and Industrial			707			43
Total		$	16,311		$	473
(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
		31-Dec-13
		Average Recorded Investment(1)			Interest Income Recognized
Real Estate Construction(2)
Construction, residential		$	40		$	---
Construction, other			2,885			---
Consumer Real Estate(2)
Residential closed-end first liens			364			3
Residential closed-end junior liens			280			9
Investor-owned residential real estate			131			6
Commercial Real Estate(2)
Multifamily real estate			4,172			---
Commercial real estate, owner occupied			5,265			136
Commercial real estate, other			3,369			110
Commercial Non Real Estate(2)
Commercial and Industrial			117			3
Consumer Non Real Estate(2)
Automobile			31			---
Total		$	16,654		$	267
	-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
		31-Dec-12
		Average Recorded Investment(1)			Interest Income Recognized
Real Estate Construction(2)
Construction, residential		$	1,171			---
Construction, other			4,290			1
Consumer Real Estate(2)
Equity lines			101			---
Residential closed-end first liens			873			2
Residential closed-end junior liens			234			---
Commercial Real Estate(2)
Multifamily real estate			1,466			5
Commercial real estate, owner occupied			4,806			1
Commercial Non Real Estate(2)
Commercial and Industrial			570			---
Consumer Non Real Estate(2)
Automobile			4			---
Other consumer			25			---
Total		$	13,540		$	9
	-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:
31-Dec-14
		30 – 89 Days Past Due			90 or More Days Past Due			90 or More Days Past Due and Still Accruing			Nonaccruals (Including Impaired Nonaccruals)
Real Estate Construction
Construction, residential		$	---		$	---		$	---		$	---
Construction, other			28			---			---			---
Consumer Real Estate
Equity lines			25			---			---			---
Residential closed-end first liens			719			185			80			105
Residential closed-end junior liens			74			1			1			---
Investor-owned residential real estate			336			45			---			59
Commercial Real Estate
Multifamily real estate			850			868			---			2,735
Commercial real estate, owner occupied			---			1,066			102			2,573
Commercial real estate, other			---			70			---			3,066
Commercial Non Real Estate
Commercial and Industrial			153			43			---			749
Public Sector and IDA
Public sector and IDA			---			---			---			---
Consumer Non Real Estate
Credit cards			3			4			4			---
Automobile			205			20			20			---
Other consumer loans			54			---			---			---
Total		$	2,447		$	2,302		$	207		$	9,287
31-Dec-13
		30 – 89 Days Past Due			90 or More Days Past Due			90 or More Days Past Due and Still Accruing			Nonaccruals (Including Impaired Nonaccruals)
Real Estate Construction
Construction, residential		$	45		$	---		$	---		$	---
Construction, other			45			---			---			---
Consumer Real Estate
Equity lines			---			---			---			---
Residential closed-end first liens			903			252			128			308
Residential closed-end junior liens			10			---			---			---
Investor-owned residential real estate			422			91			---			91
Commercial Real Estate
Multifamily real estate			430			3,278			---			3,278
Commercial real estate, owner occupied			604			2,519			---			2,756
Commercial real estate, other			32			---			---			---
Commercial Non Real Estate
Commercial and Industrial			196			43			---			128
Public Sector and IDA
Public sector and IDA			---			---			---			---
Consumer Non Real Estate
Credit cards			3			13			13			---
Automobile			217			26			2			23
Other consumer loans			49			46			47			---
Total		$	2,956		$	6,268		$	190		$	6,584
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 indicate heightened risk are graded as “pass.” Loans that appear to have elevated credit risk because of frequent or persistent past due status, which is less than 75 days, or that show weakness in the borrower’s financial condition are risk graded “special mention.” Loans with frequent or persistent delinquency exceeding 75 days or that have a higher level of weakness in the borrower’s financial condition are graded “classified.” Classified loans have regulatory risk ratings of “substandard” and “doubtful.” Allocations are increased by 50% and by 100% for loans with grades of “special mention” and “classified,” respectively.
Determination of risk grades was completed for the portfolio as of December 31, 2014, 2013 and 2012.
The following displays non-impaired gross loans by credit quality indicator:
31-Dec-14
		Pass			Special Mention			Classified
					(Excluding Impaired)			(Excluding Impaired)
Real Estate Construction
Construction, 1-4 family residential		$	14,222		$	---		$	2,265
Construction, other			29,047			---			28
Consumer Real Estate
Equity lines			15,861			59			60
Closed-end first liens			78,806			1,566			1,412
Closed-end junior liens			4,258			21			95
Investor-owned residential real estate			42,781			688			614
Commercial Real Estate
Multifamily residential real estate			73,611			1,397			850
Commercial real estate owner-occupied			125,643			202			2,855
Commercial real estate, other			90,821			1,177			582
Commercial Non Real Estate
Commercial and Industrial			31,247			97			1,390
Public Sector and IDA
States and political subdivisions			41,361			---			---
Consumer Non Real Estate
Credit cards			5,705			---			---
Automobile			11,505			93			128
Other consumer			10,745			---			6
Total		$	575,613		$	5,300		$	10,285
31-Dec-13
		Pass			Special Mention			Classified
					(Excluding Impaired)			(Excluding Impaired)
Real Estate Construction
Construction, 1-4 family residential		$	17,702		$	163		$	45
Construction, other			27,971			29			15
Consumer Real Estate
Equity lines			16,146			16			---
Closed-end first liens			82,767			1,007			1,275
Closed-end junior liens			4,813			109			3
Investor-owned residential real estate			38,071			105			407
Commercial Real Estate
Multifamily residential real estate			67,573			---			958
Commercial real estate owner-occupied			134,137			2,206			701
Commercial real estate, other			89,340			1,209			3,063
Commercial Non Real Estate
Commercial and Industrial			29,987			878			295
Public Sector and IDA
States and political subdivisions			24,220			---			---
Consumer Non Real Estate
Credit cards			6,354			---			---
Automobile			11,428			253			34
Other consumer			10,253			17			60
Total		$	570,762		$	5,992		$	6,856
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 major reclassifications from portfolio loans to held for sale. Occasionally, the Company purchases or sells participations in loans. All participation loans purchased met the Company’s normal underwriting standards at the time the participation was entered. Participation loans are included in the appropriate portfolio balances to which the allowance methodology is applied.
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, 2014 and 2013.
Note: Only classes with restructured loans are presented.
		Restructurings that occurred during the year ended
		31-Dec-14
		Number of Contracts			Pre-Modification Outstanding Recorded Investment			Post-Modification Outstanding Recorded Investment(1)
Consumer Real Estate
Closed-end first liens			1		$	126		$	143
Commercial Real Estate
Multifamily residential real estate			1			2,484			2,484
Commercial real estate owner-occupied			1			184			208
Commercial real estate non owner-occupied			2			2,967			3,008
Total			5		$	5,761		$	5,843
	-1	Post-modification outstanding recorded investment considers amounts immediately following the modification. Amounts do not reflect balances at the end of the period.
		Restructurings that occurred during the year ended
		31-Dec-13
		Number of Contracts			Pre-Modification Outstanding Recorded Investment			Post-Modification Outstanding Recorded Investment(1)
Consumer Real Estate
Closed-end first liens			2		$	453		$	525
Closed-end junior liens			1			262			267
Commercial Real Estate
Commercial real estate owner-occupied			1			154			239
Commercial real estate non owner-occupied			1			3,500			3,500
Commercial Non Real Estate
Commercial and Industrial			1			32			45
Total			6		$	4,401		$	4,576
	-1	Post-modification outstanding recorded investment considers amounts immediately following the modification. Amounts do not reflect balances at the end of the period.
During the year ended December 31, 2014, the Company modified five loans in troubled debt restructurings. Each restructuring provided payment relief to the borrower without forgiveness of principal or accrued interest. Each restructuring included a reduction in interest rates. Interest was capitalized at time of restructuring on the residential real estate loan, commercial real estate owner occupied loan, and the two commercial real estate non-owner occupied loans. The multifamily real estate loan, commercial real estate owner occupied loan and residential real estate loan received re-amortization of payments over a longer term. Two commercial real estate non owner occupied loans received a change in payment structure from amortizing to one year of interest-only payments. Each of the loans restructured in 2014 are designated nonaccrual, with the exception of the residential real estate loan which met the criteria for accrual status. The fair value measurements of the restructured loans as of December 31, 2014 resulted in specific allocations to the allowance for loan losses totaling $206.
The modifications that resulted in troubled debt restructurings between January 1, 2013 and December 31, 2013 provided payment relief to the borrowers without forgiveness of principal or accrued interest. The date of conversion from interest-only to amortizing payments for one commercial real estate loan was extended beyond the date specified by the contract, resulting in designation as a troubled debt restructuring. During the second quarter of 2013, the loan was converted to amortizing payments. The other commercial real estate loan was modified to extend the term, lower the interest rate and provide debt consolidation to allow the borrower increased debt service ability. Two modifications to consumer real estate loans capitalized accrued interest and reduced interest rates, while the other modification did not reduce the interest rate and shifted payments from interest-only to amortizing. One commercial non-real estate loan was modified to reduce the interest rate, capitalize interest and shift payments from interest-only to amortizing.
Restructured loans are designated impaired and measured for impairment. The impairment measurement for restructured loans that occurred in 2014 resulted in an accrual to the allowance for loan losses of $206 at December 31, 2014. Restructurings in 2013 resulted in an accrual to the allowance for loan losses of $11 at December 31, 2013.
Of the Company’s TDR’s that defaulted in 2014, none were modified within 12 months prior to default. The following table presents restructured loans that defaulted in 2013 and that were modified 12 months prior to default. The company defines default as one or more payments that occur more than 90 days past the due date, charge-off or foreclosure subsequent to modification.
Restructurings that defaulted during the year ended December 31, 2013
that were modified within 12 months prior to default
		Number of Contracts			Recorded Investment(1)
Consumer Real Estate
Closed-end first liens			1		$	24
Closed-end junior liens			1			81
Commercial Real Estate
Commercial real estate owner occupied			2			834
Commercial Non Real Estate
Commercial and industrial			1			388
Total			5		$	1,327
	-1	Recorded investment at the time the default occurred.
Of the TDRs that defaulted during 2013, 5 became TDRs within 12 months prior to default. One commercial real estate loan became past due and the collateral was foreclosed and placed into other real estate at the loan balance of $193. The collateral's fair value less selling costs was sufficient to cover the principal balance of the loan and no charge against the allowance for loan losses was required. One consumer real estate loan and one commercial non-real estate loan became past due and the underlying collateral was sold, with a resulting charge to the allowance for loan losses of $263. Two of the TDR loans remain in the loan portfolio. One consumer real estate loan became past due and impairment measurements required a $71 charge against the allowance for loan losses, while one commercial real estate loan became past due and impairment measurements indicated a specific allocation of $349 to the allowance for loan losses.

Note_6_Premises_and_Equipment

Note 6 - Premises and Equipment	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
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,
		2014			2013
	Premises	$	13,338		$	14,320
	Furniture and equipment		10,707			10,700
	Premises and equipment	$	24,045		$	25,020
	Accumulated depreciation		(14,914	)		(15,069	)
	Premises and equipment, net	$	9,131		$	9,951
	Depreciation expense for the years ended December 2014, 2013 and 2012 amounted to $732, $726 and $764, respectively.
	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 year) as of December 31, 2014 are as follows: $275 in 2015, $267 in 2016, $244 in 2017, $244 in 2018, $196 in 2019 and $23 thereafter.

Note_7_Deposits

Note 7 - Deposits	12 Months Ended
	Dec. 31, 2014
Disclosure Text Block [Abstract]
Deposit Liabilities Disclosures [Text Block]	Note 7: Deposits
	The aggregate amounts of time deposits in denominations of $250 or more at December 31, 2014 and 2013 were $23,188 and $25,885, respectively.
	At December 31, 2014 the scheduled maturities of time deposits are as follows:
	2015		107,049
	2016		59,857
	2017		18,200
	2018		22,550
	2019		8,990
	Thereafter		100
		$	216,746
	At December 31, 2014 and 2013, overdraft demand deposits reclassified to loans totaled $367 and $315, respectively.

Note_8_Employee_Benefit_Plans

Note 8 - Employee Benefit Plans	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Pension and Other Postretirement Benefits Disclosure [Text Block]	Note 8: Employee Benefit Plans
	401(k) Plan
	The Company has a Retirement Accumulation Plan qualifying under IRS Code Section 401(k), in which NBI, NBB and NBFS are participating employers. Eligible participants may contribute up to 100% of their total annual compensation to the plan, subject to certain limits based on federal tax laws. Employee contributions are matched by the employer based on a percentage of an employee’s total annual compensation contributed to the plan. For the years ended December 31, 2014, 2013 and 2012, the Company contributed $273, $282 and $279, respectively, to the plan.
	Employee Stock Ownership Plan
	The Company has a nonleveraged Employee Stock Ownership Plan (ESOP) which enables employees of NBI and its subsidiaries who have one year of service and who have attained the age of 21 prior to the plan’s January 1 and July 1 enrollment dates to own NBI common stock. Contributions to the ESOP, which are not mandatory, are determined annually by the Board of Directors. Contribution expense amounted to $100, $275 and $370 in the years ended December 31, 2014, 2013 and 2012, respectively. Dividends on ESOP shares are charged to retained earnings. As of December 31, 2014, the number of shares held by the ESOP was 246,370. All shares held by the ESOP are treated as outstanding in computing the Company’s basic net income per share. Upon reaching age 55 with ten years of plan participation, a vested participant has the right to diversify 50% of his or her allocated ESOP shares and NBI or the ESOP, with the agreement of the Trustee, is obligated to purchase those shares. The ESOP contains a put option which allows a withdrawing participant to require the Company or the ESOP, if the plan administrator agrees, to purchase his or her allocated shares if the shares are not readily tradable on an established market at the time of distribution.
	Salary Continuation Plan
	The Company has a Salary Continuation Plan for certain key officers. The plan provides the participating officers with supplemental retirement income, payable for the greater of 15 years after retirement or the officer’s lifetime. The expense accrued for the plans in 2014, 2013, and 2012, based on the present value of the retirement benefits, amounted to $246, $194, and $151, respectively. The plan is unfunded. However bank-owned life insurance has been acquired on the life of the key employees in amounts sufficient to discharge the obligations of the agreement.
	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 compensation during their final years of employment. Information pertaining to activity in the plan is as follows:
			December 31,
			2014				2013			2012
	Change in benefit obligation
	Projected benefit obligation at beginning of year		$	17,185			$	18,054		$	15,808
	Service cost			524				596			468
	Interest cost			663				617			738
	Actuarial (gain) loss			1,674				(1,149	)		1,554
	Benefits paid			(722	)			(933	)		(514	)
	Projected benefit obligation at end of year		$	19,324			$	17,185		$	18,054
	Change in plan assets
	Fair value of plan assets at beginning of year		$	16,605			$	14,325		$	13,326
	Actual return on plan assets			884				2,225			963
	Employer contribution			363				988			550
	Benefits paid			(722	)			(933	)		(514	)
	Fair value of plan assets at end of year		$	17,130			$	16,605		$	14,325
	Funded status at the end of the year		$	(2,194	)		$	(580	)	$	(3,729	)
	Amounts recognized in the Consolidated Balance Sheet
	Deferred tax asset		$	768			$	203		$	1,305
	Other liabilities			(2,194	)			(580	)		(3,729	)
	Total amounts recognized in the Consolidated Balance Sheet		$	(1,426	)		$	(377	)	$	(2,424	)
	Amounts recognized in accumulated other comprehensive (loss), net
	Net loss		$	(6,922	)		$	(5,282	)	$	(8,202	)
	Prior service cost			669				779			879
	Deferred tax asset			2,163				1,550			2,538
	Amount recognized		$	(4,090	)		$	(2,953	)	$	(4,785	)
	Accrued/Prepaid benefit cost, net
	Benefit obligation		$	(19,324	)		$	(17,185	)	$	(18,054	)
	Fair value of assets			17,130				16,605			14,325
	Unrecognized net actuarial loss			6,922				5,282			8,202
	Unrecognized prior service cost			(669	)			(779	)		(879	)
	Deferred tax liability			(1,395	)			(1,347	)		(1,233	)
	Prepaid benefit cost included in other liabilities		$	2,664			$	2,576		$	2,361
	Components of net periodic benefit cost
	Service cost		$	524			$	596		$	468
	Interest cost			663				617			738
	Expected return on plan assets			(1,112	)			(984	)		(1,075	)
	Amortization of prior service cost			(110	)			(101	)		(101	)
	Recognized net actuarial loss			262				532			508
	Net periodic benefit cost		$	227			$	660		$	538
	Other changes in plan assets and benefit obligations recognized in other comprehensive loss
	Net (gain) loss		$	1,640			$	(2,921	)	$	1,157
	Amortization of prior service cost			110				101			101
	Deferred income tax expense (benefit)			(612	)			987			(440	)
	Total recognized		$	1,138			$	(1,833	)	$	818
	Total recognized in net periodic benefit cost and other comprehensive loss		$	1,977			$	(2,160	)	$	1,796
	Weighted average assumptions at end of the year
	Discount rate used for net periodic pension cost			4.5	%			3.75	%		4.5	%
	Discount rate used for disclosure			3.75	%			4.5	%		3.75	%
	Expected return on plan assets			7.5	%			7.5	%		8	%
	Rate of compensation increase			3	%			3	%		3	%
	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 given to recent experience, which may not continue over the measurement period, but higher significance is placed on current forecasts of future long-term economic conditions.
	Because assets are held in a qualified trust, anticipated returns are not reduced for taxes. Further, and solely for this purpose, the plan is assumed to continue in force and not terminate during the period during which assets are invested. However, consideration is given to the potential impact of current and future investment policy, cash flow into and out of the trust, and expenses (both investment and non-investment) typically paid from plan assets (to the extent such expenses are not explicitly estimated within periodic cost).
	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 make documented exceptions. The guidelines state that, unless otherwise indicated, all investments that are permitted under the Prudent Investor Rule shall be permissible investments for the defined benefit pension plan. All plan assets are to be invested in marketable securities. Certain investments are prohibited, including commodities and future contracts, private placements, repurchase agreements, options and derivatives. The Policy establishes quality standards for fixed income investments and mutual funds included in the pension plan trust. The Policy also outlines diversification standards.
	The preferred target allocation for the assets of the defined benefit pension plan is 65% in equity securities and 35% in fixed income securities. Equity securities include investments in large-cap and mid-cap companies primarily located in the United States, although a small number of international large-cap companies are included. There are also investments in mutual funds holding the equities of large-cap and mid-cap U.S. companies. Fixed income securities include U.S. government agency securities and corporate bonds from companies representing diversified industries. There are no investments in hedge funds, private equity funds or real estate.
Fair value measurements of the pension plan’s assets at December 31, 2014 follow:
		Fair Value Measurements at December 31, 2014
		Total				Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
Asset Category
Cash		$	737			$	737		$	---		$	---
Equity securities:
U. S. companies			8,729				8,729			---			---
International companies			274				274			---			---
Equities mutual funds (1)			1,861				1,861			---			---
U. S. government agencies and corporations			107				---			107			---
State and political subdivisions			365				---			365			---
Corporate bonds – investment grade (2)			5,057				---			5,057			---
Total pension plan assets		$	17,130			$	11,601		$	5,529		$	---
	-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.
		Fair Value Measurements at December 31, 2013
		Total				Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
Asset Category
Cash		$	1,319			$	1,319		$	---		$	---
Equity securities:
U. S. companies			8,091				8,091			---			---
International companies			137				137			---			---
Equities mutual funds (1)			2,490				2,490			---			---
U. S. government agencies and corporations			358				---			358			---
State and political subdivisions			398				---			398			---
Corporate bonds – investment grade (2)			3,812				---			3,812			---
Total pension plan assets		$	16,605			$	12,037		$	4,568		$	---
	-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 2015 has not yet been determined.
Estimated future benefit payments, which reflect expected future service, as appropriate, are as follows:
2015						$	3,467
2016						$	1,161
2017						$	1,907
2018						$	1,002
2019						$	735
2020				-	2024	$	4,239

Note_9_Stock_Option_Plan

Note 9 - Stock Option Plan	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]	Note 9: Stock Option Plan
	The Company had a stock option plan, the 1999 Stock Option Plan, that was adopted in 1999 and that was terminated on March 9, 2009. Incentive stock options were granted annually to key employees of NBI and its subsidiaries from 1999 to 2005 and none have been granted since 2005. All of the stock options are vested.
	A summary of the status of the Company’s stock option plan is presented below:
							Weighted-
					Weighted-		Average		Aggregate
					Average		Remaining		Intrinsic
	Options	Shares			Exercise		Contractual		Value
					Price		Term
	Outstanding at January 1, 2014		46,000		$	23.96
	Granted		---			---
	Exercised		(2,500	)		23
	Forfeited or expired		(23,000	)		24.93
	Outstanding at December 31, 2014		20,500		$	23		0.85	$	151
	Exercisable at December 31, 2014		20,500		$	23		0.85	$	151
	In 2014, there were 2,500 shares exercised with an intrinsic value of $15. There were no shares exercised in 2013. For 2012, the intrinsic value of shares exercised was $141. Intrinsic value is the difference between the price at which the shares may be exercised and the stock price as of the report date. No tax benefit was recognized on shares exercised in any of these years.

Note_10_Income_Taxes

Note 10 - Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	Note 10: 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 longer subject to U.S. federal, state and local income tax examinations by tax authorities for years prior to 2010.
	Allocation of income tax expense between current and deferred portions is as follows:
		Years ended December 31,
		2014			2013			2012
	Current	$	5,105		$	5,253		$	5,064
	Deferred expense		73			64			181
	Total income tax expense	$	5,178		$	5,317		$	5,245
	The following is a reconciliation of the “expected” income tax expense, computed by applying the U.S. Federal income tax rate of 35% to income before income tax expense, with the reported income tax expense:
		Years ended December 31,
		2014			2013			2012
	Computed “expected” income tax expense	$	7,732		$	8,087		$	8,047
	Tax-exempt interest income		(2,422	)		(2,592	)		(2,554	)
	Nondeductible interest expense		102			118			139
	Other, net		(234	)		(296	)		(387	)
	Reported income tax expense	$	5,178		$	5,317		$	5,245
	The components of net deferred tax assets, included in other assets, are as follows:
		December 31,
		2014			2013
	Deferred tax assets:
	Allowance for loan losses and unearned fee income	$	3,098		$	3,169
	Valuation allowance on other real estate owned		37			110
	Deferred compensation and other liabilities		1,897			1,201
	Discount accretion of securities		28			29
	Net unrealized loss on securities available for sale		852			7,545
	Total deferred tax assets	$	5,912		$	12,054
	Deferred tax liabilities:
	Fixed assets	$	(160	)	$	(270	)
	Deposit intangibles		(1,312	)		(1,191	)
	Total deferred tax liabilities		(1,472	)		(1,461	)
	Net deferred tax assets	$	4,440		$	10,593
	The Company has determined that a valuation allowance for the gross deferred tax assets is not necessary at December 31, 2014 and 2013 because the realization of all gross deferred tax assets can be supported by the amount of taxes paid during the carryback period available under current tax laws.

Note_11_Restrictions_on_Divide

Note 11 - Restrictions on Dividends	12 Months Ended
	Dec. 31, 2014
Disclosure of Restrictions on Dividends, Loans and Advances Disclosure [Abstract]
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, 2014, 2013 and 2012, dividends received from the subsidiary bank were $7,853, $7,782 and $7,639, respectively.
	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 years, less any required transfers to surplus. At December 31, 2014, retained net income, which was free of such restriction, amounted to approximately $30,300.

Note_12_Minimum_Regulatory_Cap

Note 12 - Minimum Regulatory Capital Requirement	12 Months Ended
	Dec. 31, 2014
Disclosure Text Block [Abstract]
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 applicable to bank holding companies.
	Quantitative measures established by regulation to ensure capital adequacy require the Company and the bank to maintain minimum amounts and ratios (set forth in the following table) of total and Tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined), and of Tier 1 capital (as defined) to average assets (as defined). Management believes, as of December 31, 2014 and 2013, that the Company and the bank meet all capital adequacy requirements to which they are subject.
	As of December 31, 2014, the most recent notifications from the Office of the Comptroller of the Currency categorized the bank as well capitalized under the regulatory framework for prompt corrective action. To be categorized as well capitalized, an institution must maintain minimum total risk-based, Tier 1 risk-based and Tier 1 leverage ratios, as set forth in the following tables. There are no conditions or events since these notifications that management believes have changed the bank’s category. The Company’s and the bank’s actual capital amounts and ratios as of December 31, 2014 and 2013 are also presented in the following tables.
		Actual					Minimum Capital					Minimum To Be Well
							Requirement					Capitalized Under
												Prompt Corrective
												Action Provisions
		Amount		Ratio			Amount		Ratio			Amount		Ratio
	31-Dec-14
	Total capital (to risk weighted assets)
	NBI consolidated	$	172,976		24.9	%	$	55,615		8	%	N/A		N/A
	NBB		170,665		24.6	%		55,438		8	%	$	69,298		10	%
	Tier 1 capital (to risk weighted assets)
	NBI consolidated	$	164,713		23.7	%	$	27,807		4	%	N/A		N/A
	NBB		162,402		23.4	%		27,719		4	%	$	41,579		6	%
	Tier 1 capital (to average assets)
	NBI consolidated	$	164,713		14.6	%	$	45,122		4	%	N/A		N/A
	NBB		162,402		14.4	%		45,074		4	%	$	56,342		5	%
		Actual					Minimum Capital					Minimum To Be Well
							Requirement					Capitalized Under
												Prompt Corrective
												Action Provisions
		Amount		Ratio			Amount		Ratio			Amount		Ratio
	31-Dec-13
	Total capital (to risk weighted assets)
	NBI consolidated	$	162,763		23.6	%	$	55,192		8	%	N/A		N/A
	NBB		160,049		23.3	%		54,980		8	%	$	68,726		10	%
	Tier 1 capital (to risk weighted assets)
	NBI consolidated	$	154,536		22.4	%	$	27,596		4	%	N/A		N/A
	NBB		151,822		22.1	%		27,490		4	%	$	41,235		6	%
	Tier 1 capital (to average assets)
	NBI consolidated	$	154,536		14.1	%	$	43,946		4	%	N/A		N/A
	NBB		151,822		13.8	%		43,904		4	%	$	54,880		5	%

Note_13_Condensed_Financial_St

Note 13 - Condensed Financial Statements of Parent Company	12 Months Ended
	Dec. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Financial Information of Parent Company Only Disclosure [Text Block]	Note 13: Condensed Financial Statements of Parent Company
	Financial information pertaining only to NBI (Parent) is as follows:
	Condensed Balance Sheets
		December 31,
		2014			2013
	Assets
	Cash due from subsidiaries	$	10		$	27
	Interest-bearing deposits		477			690
	Securities available for sale		127			623
	Securities held to maturity (fair value approximates $450 at December 31, 2014 and $0 at December 31, 2013)		452			---
	Investments in subsidiaries, at equity		165,647			144,513
	Other assets		188			478
	Total assets	$	166,901		$	146,331
	Liabilities and Stockholders’ Equity
	Other liabilities	$	598		$	439
	Stockholders’ equity		166,303			145,892
	Total liabilities and stockholders’ equity	$	166,901		$	146,331
	Condensed Statements of Income
		Years Ended December 31,
		2014			2013			2012
	Income
	Dividends from subsidiaries	$	7,853		$	7,882		$	7,639
	Interest on securities – taxable		2			2			5
	Interest on securities – nontaxable		1			19			33
	Realized securities losses, net		---			(94	)		---
	Other income		1,250			1,219			1,213
		$	9,106		$	9,028		$	8,890
	Expenses
	Other expenses	$	2,046		$	1,943		$	1,791
	Income before income tax benefit and equity in undistributed net income of subsidiaries		7,060			7,085			7,099
	Applicable income tax benefit		136			160			136
	Income before equity in undistributed net income of subsidiaries		7,196			7,245			7,235
	Equity in undistributed net income of subsidiaries		9,718			10,545			10,512
	Net income	$	16,914		$	17,790		$	17,747
	Condensed Statements of Cash Flows
		Years ended December 31,
		2014			2013			2012
	Cash Flows from Operating Expenses
	Net income	$	16,914		$	17,790		$	17,747
	Adjustments to reconcile net income to net cash provided by operating activities:
	Equity in undistributed net income of subsidiaries		(9,718	)		(10,545	)		(10,512	)
	Amortization of premiums and accretion of discounts, net		1			---			1
	Depreciation expense		9			17			12
	(Gains) Losses on disposal of fixed assets		94			---			---
	Net change in refundable income taxes due from subsidiaries		96			77			77
	Net change in other assets		(63	)		3			(199	)
	Net change in other liabilities		(33	)		20			(124	)
	Losses on securities		---			94			---
	Net cash provided by operating activities		7,300			7,456			7,002
	Cash Flows from Investing Activities
	Net Change in interest-bearing deposits		213			(2	)		(124	)
	Purchases of securities available for sale		---			(612	)		(691	)
	Purchases of securities held to maturity		(453	)		---			---
	Maturities and calls of securities available for sale		455			945			1,352
	Proceeds from sale of premises and equipment		263			---			---
	Net cash provided by investing activities		478			331			537
	Cash Flows from Financing Activities
	Cash dividends paid		(7,853	)		(7,781	)		(7,639	)
	Exercise of stock options		58			---			119
	Net cash used in financing activities		(7,795	)		(7,781	)		(7,520	)
	Net change in cash		17			6			19
	Cash due from subsidiaries at beginning of year		27			21			2
	Cash due from subsidiaries at end of year	$	10		$	27		$	21

Note_14_Financial_Instruments_

Note 14 - Financial Instruments with Off-Balance Sheet Risk	12 Months Ended
	Dec. 31, 2014
Disclosure Text Block Supplement [Abstract]
Financial Instruments Disclosure [Text Block]	Note 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 require collateral or other security to support the following financial instruments with credit risk.
	At December 31, 2014 and 2013, the following financial instruments were outstanding whose contract amounts represent credit risk:
		December 31,
		2014		2013
	Financial instruments whose contract amounts represent credit risk:
	Commitments to extend credit	$	144,578	$	133,573
	Standby letters of credit		14,677		15,215
	Mortgage loans sold with potential recourse		10,089		18,257
	Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. The commitments for lines of credit may expire without being drawn upon. Therefore, the total commitment amounts do not necessarily represent future cash requirements. The amount of collateral obtained, if it is deemed necessary by the Company, is based on management’s credit evaluation of the customer.
	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 contain a specified maturity date and may not be drawn upon to the total extent to which the Company is committed.
	Standby letters of credit are conditional commitments issued by the Company to guarantee the performance of a customer to a third party. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loans to customers. Collateral held varies but may include accounts receivable, inventory, property, plant and equipment, and income-producing commercial properties.
	The Company originates mortgage loans for sale to secondary market investors subject to contractually specified and limited recourse provisions. In 2014, the Company originated $9,104 and sold $10,089 to investors, compared to $16,737 originated and $18,257 sold in 2013. Every contract with each investor contains certain recourse language. In general, the Company may be required to repurchase a previously sold mortgage loan if there is major noncompliance with defined loan origination or documentation standards, including fraud, negligence or material misstatement in the loan documents. Repurchase may also be required if necessary governmental loan guarantees are canceled or never issued, or if an investor is forced to buy back a loan after it has been resold as a part of a loan pool. In addition, the Company may have an obligation to repurchase a loan if the mortgagor has defaulted early in the loan term. This potential default period is approximately twelve months after sale of a loan to the investor.
	At December 31, 2014, the Company had locked-rate commitments to originate mortgage loans amounting to approximately $424 and loans held for sale of $291. Risks arise from the possible inability of counterparties to meet the terms of their contracts. The Company does not expect any counterparty to fail to meet its obligations.
	The Company maintains cash accounts in other commercial banks. The Company had no deposits with correspondent institutions at December 31, 2014 that exceeded the insurance limits of the Federal Deposit Insurance Corporation.

Note_15_Concentrations_of_Cred

Note 15 - Concentrations of Credit Risk	12 Months Ended
	Dec. 31, 2014
Risks and Uncertainties [Abstract]
Concentration Risk Disclosure [Text Block]	Note 15: Concentrations of Credit Risk
	The Company does a general banking business, serving the commercial and personal banking needs of its customers. NBB’s market area in southwest Virginia is made up of the counties of Montgomery, Giles, Pulaski, Tazewell, Wythe, Smyth and Washington. It also includes the independent cities of Radford and Galax, and the portions of Carroll and Grayson Counties that are adjacent to Galax. In addition, it serves those portions of Mercer County and McDowell County, West Virginia that are contiguous with Tazewell County. Substantially all of NBB’s loans are made in its market area. The ultimate collectability of the bank’s loan portfolio and the ability to realize the value of any underlying collateral, if needed, is influenced by the economic conditions of the market area. The Company’s operating results are therefore closely correlated with the economic trends within this area.
	Commercial real estate as of December 31, 2014 and 2013 represented approximately 52% of the loan portfolio, at $310,762 and $311,266, respectively. Included in commercial real estate are loans for college housing and professional office buildings that comprised $190,055 and $190,866 as of December 31, 2014 and 2013 respectively, corresponding to approximately 31% of the loan portfolio at December 31, 2014 and 32% of the loan portfolio at December 31, 2013. Loans secured by residential real estate were $147,039, or approximately 24% of the portfolio, and $145,499, or 24% of the portfolio at December 31, 2014 and 2013, respectively. Loans secured by automobiles represented approximately 2% of the portfolio for both dates, at $11,554 and $11,580 at December 31, 2014 and 2013, respectively.
	The Company has established operating policies relating to the credit process and collateral in loan originations. Loans to purchase real and personal property are generally collateralized by the related property and with loan amounts established based on certain percentage limitations of the property’s total stated or appraised value. Credit approval is primarily a function of collateral and the evaluation of the creditworthiness of the individual borrower or project based on available financial information. Management considers the concentration of credit risk to be minimal.

Note_16_Fair_Value_Measurement

Note 16 - Fair Value Measurements	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Text Block]	Note 16: 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 quoted market prices for the Company’s various financial instruments. In cases where quoted market prices are not available, fair values are based on estimates using present value or other valuation techniques. Those techniques are significantly affected by the assumptions used, including the discount rate and estimates of future cash flows. Accordingly, the fair value estimates may not be realized in an immediate settlement of the instrument. Accounting guidance for fair value excludes certain financial instruments and all nonfinancial instruments from its disclosure requirements. Accordingly, the aggregate fair value amounts presented may not necessarily represent the underlying fair value of the Company.
	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 active.
	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 levels of the fair value hierarchy based on these two types of inputs are as follows:
		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 or more significant inputs or assumptions that are unobservable in the market.
	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 Available for Sale
	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). If quoted market prices are not available, fair values are measured utilizing independent valuation techniques of identical or similar securities for which significant assumptions are derived primarily from or corroborated by observable market data. Third party vendors compile prices from various sources and may determine the fair value of identical or similar securities by using pricing models that consider observable market data (Level 2). The carrying value of restricted Federal Reserve Bank and Federal Home Loan Bank stock approximates fair value based upon the redemption provisions of each entity and is therefore excluded from the following table.
	The following tables present the balances of financial assets measured at fair value on a recurring basis as of December 31, 2014 and 2013:
							Fair Value Measurements at December 31, 2014 Using
	Description		Balance as of				Quoted Prices				Significant				Significant
			December 31,				in Active				Other				Unobservable Inputs
			2014				Markets for				Observable				(Level 3)
							Identical Assets				Inputs
							(Level 1)				(Level 2)
	U.S. Government agencies and corporations			194,219				---				194,219				---
	States and political subdivisions			19,380				---				19,380				---
	Mortgage-backed securities			2,014				---				2,014				---
	Corporate debt securities			7,104				---				7,104				---
	Other securities			127				---				127				---
	Total securities available for sale		$	222,844			$	---			$	222,844			$	---
							Fair Value Measurements at December 31, 2013 Using
	Description		Balance as of				Quoted Prices				Significant				Significant
			December 31,				in Active				Other				Unobservable Inputs
			2013				Markets for				Observable				(Level 3)
							Identical Assets				Inputs
							(Level 1)				(Level 2)
	U.S. Government agencies and corporations			147,854				---				147,854				---
	States and political subdivisions			23,456				---				23,456				---
	Mortgage-backed securities			2,840				---				2,840				---
	Corporate debt securities			7,395				---				7,395				---
	Other securities			167				---				167				---
	Total securities available for sale		$	181,712			$	---			$	181,712			$	---
	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 Held for Sale
	Loans held for sale are carried at the lower of cost or market value. These loans currently consist of one-to-four family residential loans originated for sale in the secondary market. Fair value is based on the price secondary markets are currently offering for similar loans using observable market data which is not materially different than cost due to the short duration between origination and sale (Level 2). As such, the Company records any fair value adjustments on a nonrecurring basis. No nonrecurring fair value adjustments were recorded on loans held for sale during the years ended December 31, 2014 and 2013.
	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 be collected according to the contractual terms of the loan agreement. Troubled debt restructurings are impaired loans. Impaired loans are measured at fair value on a nonrecurring basis. If an individually-evaluated impaired loan’s balance exceeds fair value, the amount is allocated to the allowance for loan losses. Any fair value adjustments are recorded in the period incurred as provision for loan losses on the Consolidated Statements of Income.
	The fair value of an impaired loan and measurement of associated loss is based on one of three methods: the observable market price of the loan, the present value of projected cash flows, or the fair value of the collateral. The observable market price of a loan is categorized as a Level 1 input. The present value of projected cash flows method results in a Level 3 categorization because the calculation relies on the Company’s judgment to determine projected cash flows, which are then discounted at the current rate of the loan, or the rate prior to modification if the loan is a troubled debt restructure.
	Loans measured using the fair value of collateral method may be categorized in Level 2 or Level 3. Collateral may be in the form of real estate or business assets including equipment, inventory, and accounts receivable. Most collateral is real estate. 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 or more are based on a current appraisal. Appraisals are also used to value impaired loans with principal balances of $100 or greater and secured by one piece of collateral. Collateral-method impaired loans with principal balances below $100, or if secured by multiple pieces of collateral, below $250, are valued using an internal evaluation.
	The value of real estate collateral is determined by a current (less than 12 months of age) appraisal or internal evaluation utilizing an income or market valuation approach. Appraisals conducted by an independent, licensed appraiser outside of the Company using observable market data is categorized as Level 2. If a current appraisal cannot be obtained prior to a reporting date and an existing appraisal is discounted to obtain an estimated value, or if declines in value are identified after the date of the appraisal, or if an appraisal is discounted for estimated selling costs, the valuation of real estate collateral is categorized as Level 3. Valuations derived from internal evaluations are categorized as Level 3. The value of business equipment is based upon an outside appraisal (Level 2) if deemed significant, or the net book value on the applicable business’ financial statements (Level 3) if not considered significant. Likewise, values for inventory and accounts receivables collateral are based on financial statement balances or aging reports (Level 3).
	As of December 31, 2014, the fair value measurements for impaired loans with specific allocations were primarily based upon the present value of expected future cash flows, with one loan valued based on the fair value of collateral. As of December 31, 2013, the fair value measurements for impaired loans with specific allocations were primarily based upon the present value of expected future cash flows, with two loans valued based on the fair value of collateral.
	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				Significant				Significant
									in Active				Other				Unobservable Inputs
									Markets for				Observable				(Level 3)
									Identical Assets				Inputs
									(Level 1)				(Level 2)
			Assets:
	31-Dec-14		Impaired loans net of valuation allowance		$	7,224			$	---			$	---			$	7,224
	31-Dec-13		Impaired loans net of valuation allowance			1,989				---				---				1,989
	The following table presents information about Level 3 Fair Value Measurements for December 31, 2014.
			Valuation Technique		Unobservable Input		Range
							(Weighted Average)
	Impaired loans		Discounted appraised value		Selling cost(1)			10%	-2
	Impaired loans		Present value of cash flows		Discount rate			5.88%		-	9.50%	-6.15%
		-1	Impaired loans that are collateral-dependent are valued using the fair value of collateral. The valuation is discounted for selling costs if repayment of the loan is dependent on the sale of the collateral. If repayment will come from rental income of the property, the valuation is not discounted for selling costs.
		-2	Only one loan was valued using the collateral method as of December 31, 2014.
	The following table presents information about Level 3 Fair Value Measurements for December 31, 2013.
			Valuation Technique		Unobservable Input		Range
(Weighted Average)
Impaired loans		Discounted appraised value		Selling cost(1)			0%		-	10.00%	-5.00%
Impaired loans		Present value of cash flows		Discount rate			6.25%		-	9.50%	-6.75%
	-1	Impaired loans that are collateral-dependent are valued using the fair value of collateral. The valuation is discounted for selling costs if repayment of the loan is dependent on the sale of the collateral. If repayment will come from rental income of the property, the valuation is not discounted for selling costs.
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 input. If current appraisals cannot be obtained prior to reporting dates, or if declines in value are identified after a recent appraisal is received, appraisal values are discounted, resulting in Level 3 estimates. If the Company markets the property with a realtor, estimated selling costs reduce the fair value, resulting in a valuation based on Level 3 inputs.
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				Significant				Significant
								in Active				Other				Unobservable Inputs
								Markets for				Observable				(Level 3)
								Identical Assets				Inputs
								(Level 1)				(Level 2)
		Assets:
31-Dec-14		Other real estate owned net of valuation allowance		$	4,744			$	---			$	---			$	4,744
31-Dec-13		Other real estate owned net of valuation allowance			4,712				---				---				4,712
The following table presents information about Level 3 Fair Value Measurements for December 31, 2014.
		Valuation Technique		Unobservable Input		Range
						(Weighted Average)
Other real estate owned		Discounted appraised value		Selling cost			0%	-1	-	11%	-8.60%
Other real estate owned		Discounted appraised value		Discount for lack of marketability and age of appraisal			0%		-	48.77%	-20.81%
The following table presents information about Level 3 Fair Value Measurements for December 31, 2013.
		Valuation Technique		Unobservable Input		Range
						(Weighted Average)
Other real estate owned		Discounted appraised value		Selling cost			0%	-1	-	10.00%	-9.83%
Other real estate owned		Discounted appraised value		Discount for lack of marketability and age of appraisal			0%		-	29.60%	-8.66%
	-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 discounted by selling costs.
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 readily available through market sources other than dealer quotations, so fair value estimates are based on quoted market prices of similar instruments adjusted for differences between the quoted instruments and the instruments being valued. The carrying value of restricted securities approximates fair value based upon the redemption provisions of the applicable entities.
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 deemed significant at December 31, 2014 and 2013, and, as such, the related fair values have not been estimated.
The estimated fair values, and related carrying amounts, of the Company’s financial instruments are as follows:
		31-Dec-14
						Estimated Fair Value
		Carrying				Level 1				Level 2				Level 3
		Amount
Financial assets:
Cash and due from banks		$	12,894			$	12,894			$	---			$	---
Interest-bearing deposits			102,548				102,548				---				---
Securities			384,296				---				390,547				---
Restricted securities			1,089				---				1,089				---
Mortgage loans held for sale			291				---				291				---
Loans, net			597,203				---				---				633,063
Accrued interest receivable			5,748				5,748				---				---
Bank-owned life insurance			21,797				21,797				---				---
Financial liabilities:
Deposits		$	982,428			$	765,682			$	---			$	216,469
Accrued interest payable			68				68				---				---
		31-Dec-13
						Estimated Fair Value
		Carrying				Level 1				Level 2				Level 3
		Amount
Financial assets:
Cash and due from banks		$	13,283			$	13,283			$	---			$	---
Interest-bearing deposits			98,066				98,066				---				---
Securities			345,695				---				341,049				---
Restricted securities			1,414				---				1,414				---
Mortgage loans held for sale			1,276				---				1,276				---
Loans, net			587,463				---				---				616,755
Accrued interest receivable			5,949				5,949				---				---
Bank-owned life insurance			21,181				21,181				---				---
Financial liabilities:
Deposits		$	960,036			$	718,327			$	---			$	247,753
Accrued interest payable			92				92				---				---

Note_17_Components_of_Accumula

Note 17 - Components of Accumulated Other Comprehensive Income	12 Months Ended
	Dec. 31, 2014
Disclosure Text Block [Abstract]
Comprehensive Income (Loss) Note [Text Block]	Note 17: Components of Accumulated Other Comprehensive Income
	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, 2011		$	2,646			(3,967	)		(1,321	)
	Unrealized holding loss on available for sale securities net of tax of ($323)			(569	)		---			(569	)
	Reclassification adjustment, net of tax of ($16)			(30	)		---			(30	)
	Net pension loss arising during the period, net of tax of ($405)			---			(752	)		(752	)
	Less amortization of prior service cost included in net periodic pension cost, net of tax of ($35)			---			(66	)		(66	)
	Balance at December 31, 2012			2,047			(4,785	)		(2,738	)
	Unrealized holding loss on available for sale securities net of tax of ($8,665)			(16,091	)		---			(16,091	)
	Reclassification adjustment, net of tax of $19			33			---			33
	Net pension gain arising during the period, net of tax of $1,022			---			1,898			1,898
	Less amortization of prior service cost included in net periodic pension cost, net of tax of ($35)			---			(66	)		(66	)
	Balance at December 31, 2013			(14,011	)	$	(2,953	)	$	(16,964	)
	Unrealized holding gain on available for sale securities net of tax of $6,693			12,430			---			12,430
	Reclassification adjustment, net of tax of ($1)			(1	)		---			(1	)
	Net pension loss arising during the period, net of tax of ($574)			---			(1,066	)		(1,066	)
	Less amortization of prior service cost included in net periodic pension cost, net of tax of ($39)			---			(71	)		(71	)
	Balance at December 31, 2014		$	(1,582	)	$	(4,090	)	$	(5,672	)
	The following table provides information regarding reclassifications out of accumulated other comprehensive income (loss) for the years ended December 31, 2014, 2013 and 2012:
			December 31,
			2014			2013			2012
	Component of Accumulated Other Comprehensive Income
	Reclassification out of unrealized gains and losses on available-for-sale securities:
	Realized securities (gains) losses, net		$	(2	)	$	52		$	(46	)
	Income tax expense (benefit)			(1	)		19			(16	)
	Realized (gains) losses on available-for-sale securities, net of tax reclassified out of accumulated other comprehensive income		$	(1	)	$	33		$	(30	)
	Amortization of defined benefit pension items:
	Prior service costs(1)		$	(110	)	$	(101	)	$	(101	)
	Income tax expense (benefit)			(39	)		(35	)		(35	)
	Amortization of defined benefit pension items net of tax reclassified out of accumulate other comprehensive income		$	(71	)	$	(66	)	$	(66	)
		-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_and_

Note 18 - Intangible Assets and Goodwill	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets Disclosure [Text Block]	Note 18. 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 in evidence. 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 that fair value is below carrying value, a two-step test is employed to determine impairment. The Company opted not to perform the preliminary assessment and employed the two-step test to determine impairment. Based on the testing for impairment of goodwill and intangible assets, there were no impairment charges for 2014, 2013 or 2012.
	Information concerning goodwill and intangible assets for years ended December 31, 2014 and 2013 is presented in the following table:
		Gross Carrying Value		Accumulated Amortization		Net Carrying Value
	31-Dec-14
	Amortizable core deposit intangibles	$	16,257	$	14,883	$	1,374
	Unamortizable goodwill	$	5,848	$	---	$	5,848
	31-Dec-13
	Amortizable core deposit intangibles	$	16,257	$	13,806	$	2,451
	Unamortizable goodwill	$	5,848	$	---	$	5,848
	As of December 31, 2014, the estimated amortization expense of core deposit intangibles are as follows:
	2015	$	999
	2016		257
	2017		68
	2018		50
	Total	$	1,374

Accounting_Policies_by_Policy_

Accounting Policies, by Policy (Policies)	12 Months Ended
	Dec. 31, 2014
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 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. As such, 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 classified as held to maturity or trading, including equity securities with readily determinable fair values, are classified as “available for sale” and recorded at fair value, with unrealized gains and losses excluded from earnings and reported in other comprehensive income. Purchase premiums and discounts are recognized in interest income using the interest method over the terms of the securities. Gains and losses on the sale of securities are recorded on the trade date and are determined using the specific identification method.
	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 have the intent to sell a debt security prior to recovery and (b) it is more likely than not that the entity will not have to sell the debt security prior to recovery, the security would not be considered other-than-temporarily impaired, unless there is a credit loss. When criteria (a) and (b) are met, the entity will recognize the credit component of an other-than-temporary impairment of a debt security in earnings and the remaining portion in other comprehensive income. For held-to-maturity debt securities, the amount of an other-than-temporary impairment recorded in other comprehensive income for the noncredit portion of a previous other-than-temporary impairment is amortized prospectively over the remaining life of the security on the basis of the timing of future estimated cash flows of the security.
	For equity securities, when the Company has decided to sell an impaired available-for-sale security and the Company does not expect the fair value of the security to fully recover before the expected time of sale, the security is deemed other-than-temporarily impaired in the period in which the decision to sell is made. The Company recognizes an impairment loss when the impairment is deemed other than temporary even if a decision to sell has not been made.
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 segments: real estate construction, consumer real estate, commercial real estate, commercial non real estate, public sector and IDA, and consumer non real estate. Each segment is subject to certain risks that influence the establishment of pricing, loan structures, approval requirements, reserves, and ongoing credit management.
	Real estate construction loans are subject to general risks from changing commercial building and housing market trends and economic conditions that may impact demand for completed properties and the costs of completion. Completed properties that do not sell or become leased within originally expected timeframes may impact the borrower’s ability to service the debt. These risks are measured by market-area unemployment rates, bankruptcy rates, housing and commercial building market trends, and interest rates. Risks specific to the borrower are also evaluated, including previous repayment history, debt service ability, and current and projected loan-to value ratios for the collateral.
	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 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, and 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, personal bankruptcy rates and interest rates.
	Risks from delinquency trends and characteristics such as second-lien position and interest-only status, as well as historical charge-off rates, are analyzed for all segments.
	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 and any deferred fees or costs on originated loans. Interest income is accrued on the unpaid principal balance. 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.
	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 days delinquent unless the credit is well secured and in the process of collection. Loans within all loan classes that are not restructured but that are impaired and have an associated impairment loss are placed on nonaccrual unless the borrower is paying as agreed. Restructured loans within all classes that allow the borrower to discontinue payments of principal or interest for more than 90 days are placed on nonaccrual unless the modification provides reasonable assurance of repayment performance and collateral value supports regular underwriting requirements. Restructured loans within all classes that maintain current status for at least six months may be returned to accrual status.
	All interest accrued but not collected for loans of all classes that are placed on nonaccrual or for loans charged off is reversed against interest income. Any interest payments received on nonaccrual loans of all classes are credited to the principal balance of the loan. Loans of all classes that have been designated nonaccrual are returned to accrual status when all the principal and interest amounts contractually due are current; future payments are reasonably assured; and for loans that financed the sale of OREO property, loan-to-value thresholds are met. The Company reviews nonaccrual loans on an individual loan basis to determine whether future payments are reasonably assured. In order for this criteria to be satisfied, the Company’s evaluation must determine that the underlying cause of the original delinquency or weakness that indicated nonaccrual status has been resolved, such as receipt of new guarantees, increased cash flows that cover the debt service or other resolution.
	A loan is considered past due when a payment of principal and/or interest is due but not paid. Credit card payments not received within 30 days after the statement date, real estate loan payments not received within the payment cycle; and all other non-real estate secured loans for which payment is not made within the required payment cycle are considered 30 days past due. Management closely monitors past due loans in timeframes of 30-89 days past due and 90 or more days past due.
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 collectible, the loss is charged against the allowance. Subsequent recoveries, if any, are credited to the allowance.
	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 according to the contractual terms of the loan agreement. Loan relationships exceeding $250,000 in nonaccrual status or that are significantly past due, or for which a credit review identified weaknesses that indicate principal and interest will not be collected according to the loan terms, as well as all loans modified in a troubled debt restructuring, are designated impaired. This policy is applicable to all loan classes.
	Fair value of impaired loans is estimated in one of three ways: (1) the estimated fair value (less selling costs) of the underlying collateral, (2) the present value of the loan’s expected future cash flows, or (3) the loan’s observable market value. The amount of recorded investment (unpaid principal net of any interest payments made by the borrower during the nonaccrual period and net of any partial charge-offs, accrued interest and deferred fees and costs) in an impaired loan that exceeds the fair value is accrued as estimated loss in the allowance. Impaired loans for which collection of interest or principal is in doubt are placed in nonaccrual status.
	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 later than when the loans are 120-180 days past due, and losses on loans secured by residential real estate or by commercial real estate are charged off by the time the loans reach 180 days past due, in compliance with regulatory guidelines. Accordingly, secured loans may be charged down to the estimated value of the collateral, with previously accrued unpaid interest reversed. Subsequent charge-offs may be required as a result of changes in the market value of collateral or other repayment prospects.
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 otherwise consider, the related loan is classified as a troubled debt restructuring (TDR). These modified terms may include reduction of the interest rate, extension of the maturity date at an interest rate lower than the current market rate for a new loan with similar risk, forgiveness of principal or accrued interest or other actions intended to minimize the economic loss. TDR loans are individually measured for impairment.
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 to 60 days. The Company protects itself from changes in interest rates through the use of best efforts forward delivery commitments, by committing to sell a loan at the time the borrower commits to an interest rate with the intent that the buyer has assumed interest rate risk on the loan. As a result, the Company is not exposed to losses nor will it realize significant gains related to its rate lock commitments due to changes in interest rates. The correlation between the rate lock commitments and the best efforts contracts is very high due to their similarity.
	The market value of rate lock commitments and best efforts contracts is not readily ascertainable with precision because rate lock commitments and best effort contracts are not actively traded in stand-alone markets. The Company determines the fair value of rate lock commitments and best efforts contracts by measuring the changes in the value of the underlying assets while taking into consideration the probability that the rate lock commitments will close. Because of the high correlation between rate lock commitments and best efforts contracts, no gain or loss occurs on the rate lock commitments.
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 years for premises, 3-10 years for furniture and equipment, and 3 years for computer software. Costs of maintenance and repairs are charged to expense as incurred and improvements are capitalized.
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 cost to sell at the date of foreclosure, establishing a new cost basis. Subsequent to foreclosure, valuations are periodically performed by management and the assets are carried at the lower of carrying amount or fair value less cost 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. Impairment testing is performed annually, as well as when an event triggering impairment may have occurred. The Company performs its annual analysis as of September 30 of each fiscal year. Accounting guidance permits preliminary assessment of qualitative factors to determine whether more substantial impairment testing is required. The Company chose to bypass the preliminary assessment and utilized a two-step process for impairment testing of goodwill. The first step tests for impairment, while the second step, if necessary, measures the impairment. No indicators of impairment were identified during the years ended December 31, 2014, 2013 and 2012.
	Intangible assets include customer deposit intangibles. Such intangible assets are amortized on a straight-line basis over their estimated useful lives, which are generally ten to twelve years.
	Goodwill is subject to at least an annual assessment for impairment by applying a fair value based test. The Company performs impairment testing in the fourth quarter. Accounting guidance provides the option of performing preliminary assessment of qualitative factors before performing more substantial testing for impairment. The Company opted not to perform the preliminary assessment. The Company’s goodwill impairment analysis considered three valuation techniques appropriate to the measurement. The first technique uses the Company’s market capitalization as an estimate of fair value; the second technique estimates fair value using current market pricing multiples for companies comparable to NBI; while the third technique uses current market pricing multiples for change-of-control transactions involving companies comparable to NBI. Each measure indicated that the Company’s fair value exceeded its book value, validating that goodwill is not impaired.
	Certain key judgments were used in the valuation measurement. Goodwill is held by the Company’s bank subsidiary. The bank subsidiary is 100% owned by the Company, and no market capitalization is available. Because most of the Company’s assets are comprised of the subsidiary bank’s equity, the Company’s market capitalization was used to estimate the Bank’s market capitalization. Other judgments include the assumption that the companies and transactions used as comparables for the second and third technique were appropriate to the estimate of the Company’s fair value, and that the comparable multiples are appropriate indicators of fair value, and compliant with accounting guidance.
	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 intangible assets arising from branch transactions over their useful life. Core deposit intangibles are subject to a recoverability test based on undiscounted cash flows, and to the impairment recognition and measurement provisions required for other long-lived assets held and used. The impairment testing showed that the expected cash flows of the intangible assets exceeded the carrying value.
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]	Stock-Based Compensation
	The Company’s 1999 Stock Option Plan terminated on March 9, 2009. Incentive stock options, all of which are now vested, were granted in the early years of the Plan. The Company recognized the cost of employment services received in exchange for awards of equity instruments based on the fair value of those awards on the date of grant. Compensation cost was recognized over the award’s required service period, which was the vesting period.
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 components of income tax expense: current and deferred. Current income tax expense reflects taxes to be paid or refunded for the current period by applying the provisions of the enacted tax law to the taxable income or excess of deductions over revenues. The Company determines deferred income taxes using the liability (or balance sheet) method. Under this method, the net deferred tax asset or liability is based on the tax effects of the differences between the book and tax bases of assets and liabilities, and enacted changes in tax rates and laws are recognized in the period in which they occur.
	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, based on the technical merits, that the tax position will be realized or sustained upon examination. The term more likely than not means a likelihood of more than 50 percent; the terms examined and upon examination also include resolution of the related appeals or litigation processes, if any. A tax position that meets the more-likely-than-not recognition threshold is initially and subsequently measured as the largest amount of tax benefit that has a greater than 50 percent likelihood of being realized upon settlement with a taxing authority that has full knowledge of all relevant information. The determination of whether or not a tax position has met the more-likely-than-not recognition threshold considers the facts, circumstances, and information available at the reporting date and is subject to management’s judgment. Deferred tax assets are reduced by a valuation allowance if, based on the weight of evidence available, it is more likely than not that some portion or all of a deferred tax asset will not be realized.
	The Company recognizes interest and penalties on income taxes as a component of income tax expense.
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 included in the consolidated financial statements since such items are not assets of the Company. Trust income is recognized on the accrual basis.
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 be issued by the Company relate solely to outstanding stock options and are determined using the treasury stock method.
	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 dilutive potential common stock.
		2014		2013		2012
	Average number of common shares outstanding		6,948,789		6,947,974		6,942,411
	Effect of dilutive options		10,345		20,419		17,456
	Average number of common shares outstanding used to calculate diluted earnings per common share		6,959,134		6,968,393		6,959,867
	The computation of diluted net income per common share excludes shares for stock options that would be anti-dilutive. There were no anti-dilutive shares in 2014, 2013 or 2012.
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 reasonable estimated. Management does not believe there are such matters that will have a material effect on the financial statements.
Advertising Costs, Policy [Policy Text Block]	Advertising
	The Company practices the policy of charging advertising costs to expenses as incurred. In 2014, the Company charged $174 to expenses, and in 2013, $194 and in 2012, $169 was expensed.
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 and deferred tax assets, other-than-temporary impairments of securities, evaluation of impairment of goodwill and other intangibles, 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 also affect the valuation of real estate acquired in connection with foreclosures or in satisfaction of loans.
	Certain reclassifications have been made to prior period balances to conform to the current year provisions.
New Accounting Pronouncements, Policy [Policy Text Block]	Recent Accounting Pronouncements
	In January 2014, the FASB issued ASU 2014-01, “Investments—Equity Method and Joint Ventures (Topic 323): Accounting for Investments in Qualified Affordable Housing Projects (a consensus of the FASB Emerging Issues Task Force).” The amendments in this ASU permit reporting entities to make an accounting policy election to account for their investments in qualified affordable housing projects using the proportional amortization method if certain conditions are met. Under the proportional amortization method, an entity amortizes the initial cost of the investment in proportion to the tax credits and other tax benefits received and recognizes the net investment performance in the income statement as a component of income tax expense (benefit). The amendments in this ASU should be applied retrospectively to all periods presented. A reporting entity that uses the effective yield method to account for its investments in qualified affordable housing projects before the date of adoption may continue to apply the effective yield method for those preexisting investments. The amendments in this ASU are effective for public business entities for annual periods and interim reporting periods within those annual periods, beginning after December 15, 2014. Early adoption is permitted. The Company is currently assessing the impact that ASU 2014-01 will have on its consolidated financial statements.
	In January 2014, the FASB issued ASU 2014-04, “Receivables—Troubled Debt Restructurings by Creditors (Subtopic 310-40): Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure (a consensus of the FASB Emerging Issues Task Force).” The amendments in this ASU clarify that an in substance repossession or foreclosure occurs, and a creditor is considered to have received physical possession of residential real estate property collateralizing a consumer mortgage loan, upon either (1) the creditor obtaining legal title to the residential real estate property upon completion of a foreclosure or (2) the borrower conveying all interest in the residential real estate property to the creditor to satisfy that loan through completion of a deed in lieu of foreclosure or through a similar legal agreement. Additionally, the amendments require interim and annual disclosure of both (1) the amount of foreclosed residential real estate property held by the creditor and (2) the recorded investment in consumer mortgage loans collateralized by residential real estate property that are in the process of foreclosure according to local requirements of the applicable jurisdiction. The amendments in this ASU are effective for public business entities for annual periods, and interim periods within those annual periods, beginning after December 15, 2014. The Company is currently assessing the impact that ASU 2014-04 will have on its consolidated financial statements.
	In June 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers: Topic 606.” This ASU applies to any entity using U.S. GAAP that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of nonfinancial assets unless those contracts are within the scope of other standards. The guidance supersedes the revenue recognition requirements in Topic 605, “Revenue Recognition, most industry-specific guidance, and some cost guidance included in Subtopic 605-35, “Revenue Recognition—Construction-Type and Production-Type Contracts.” The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To be in alignment with the core principle, an entity must apply a five step process including: identification of the contract(s) with a customer, identification of performance obligations in the contract(s), determination of the transaction price, allocation of the transaction price to the performance obligations, and recognition of revenue when (or as) the entity satisfies a performance obligation. Additionally, the existing requirements for the recognition of a gain or loss on the transfer of nonfinancial assets that are not in a contract with a customer have also been amended to be consistent with the guidance on recognition and measurement. The amendments in this ASU are effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Early adoption is not permitted. The Company is currently assessing the impact that ASU 2014-09 will have on its consolidated financial statements.
	In June 2014, the FASB issued ASU No. 2014-11, “Transfers and Servicing (Topic 860): Repurchase-to-Maturity Transactions, Repurchase Financings, and Disclosures.” This ASU aligns the accounting for repurchase-to-maturity transactions and repurchase agreements executed as a repurchase financing with the accounting for other typical repurchase agreements. The new guidance eliminates sale accounting for repurchase-to-maturity transactions and supersedes the guidance under which a transfer of a financial asset and a contemporaneous repurchase financing could be accounted for on a combined basis as a forward agreement. The amendments in the ASU also require a new disclosure for transactions economically similar to repurchase agreements in which the transferor retains substantially all of the exposure to the economic return on the transferred financial assets throughout the term of the transaction. Additional disclosures will be required for the nature of collateral pledged in repurchase agreements and similar transactions accounted for as secured borrowings. The amendments in this ASU are effective for the first interim or annual period beginning after December 15, 2014; however, the disclosure for transactions accounted for as secured borrowings is required to be presented for annual periods beginning after December 15, 2014, and interim periods beginning after March 15, 2015. Early adoption is not permitted. The Company is currently assessing the impact that ASU 2014-11 will have on its consolidated financial statements.
	In June 2014, the FASB issued ASU No. 2014-12, “Compensation – Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period.” The new guidance applies to reporting entities that grant employees share-based payments in which the terms of the award allow a performance target to be achieved after the requisite service period. The amendments in the ASU require that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. Existing guidance in “Compensation – Stock Compensation (Topic 718),” should be applied to account for these types of awards. The amendments in this ASU are effective for annual periods and interim periods within those annual periods beginning after December 15, 2015. Early adoption is permitted and reporting entities may choose to apply the amendments in the ASU either on a prospective or retrospective basis. The Company is currently assessing the impact that ASU 2014-12 will have on its consolidated financial statements.
	In August 2014, the FASB issued ASU No. 2014-14, “Receivables – Troubled Debt Restructurings by Creditors (Subtopic 310-40): Classification of Certain Government-Guaranteed Mortgage Loans upon Foreclosure.” The amendments in this ASU apply to creditors that hold government-guaranteed mortgage loans and are intended to eliminate the diversity in practice related to the classification of these guaranteed loans upon foreclosure. The new guidance stipulates that a mortgage loan be derecognized and a separate other receivable be recognized upon foreclosure if (1) the loan has a government guarantee that is not separable from the loan prior to foreclosure, (2) at the time of foreclosure, the creditor has the intent to convey the real estate property to the guarantor and make a claim on the guarantee, and the creditor has the ability to recover under that claim, and (3) at the time of foreclosure, any amount of the claim that is determined on the basis of the fair value of the real estate is fixed. Upon foreclosure, the other receivable should be measured on the amount of the loan balance (principal and interest) expected to be recovered from the guarantor. The amendments in this ASU are effective for annual periods and interim periods within those annual periods beginning after December 15, 2014. Entities may adopt the amendments on a prospective basis or modified retrospective basis as of the beginning of the annual period of adoption; however, the entity must apply the same method of transition as elected under ASU 2014-04. Early adoption is permitted provided the entity has already adopted ASU 2014-04. The Company is currently assessing the impact that ASU 2014-14 will have on its consolidated financial statements.
	In August 2014, the FASB issued ASU No. 2014-15, “Presentation of Financial Statements – Going Concern (Subtopic 205-40): Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern.” This update is intended to provide guidance about management’s responsibility to evaluate whether there is substantial doubt about an entity’s ability to continue as a going concern and to provide related footnote disclosures. Management is required under the new guidance to evaluate whether there are conditions or events, considered in the aggregate, that raise substantial doubt about the entity’s ability to continue as a going concern within one year after the date the financial statements are issued when preparing financial statements for each interim and annual reporting period. If conditions or events are identified, the ASU specifies the process that must be followed by management and also clarifies the timing and content of going concern footnote disclosures in order to reduce diversity in practice. The amendments in this ASU are effective for annual periods and interim periods within those annual periods beginning after December 15, 2016. Early adoption is permitted. The Company does not expect the adoption of ASU 2014-15 to have a material impact on its consolidated financial statements.
	In November 2014, the FASB issued ASU No. 2014-16, “Derivatives and Hedging (Topic 815): Determining Whether the Host Contract in a Hybrid Financial Instrument Issued in the Form of a Share Is More Akin to Debt or to Equity.” The amendments in ASU do not change the current criteria in U.S. GAAP for determining when separation of certain embedded derivative features in a hybrid financial instrument is required. The amendments clarify how current U.S. GAAP should be interpreted in evaluating the economic characteristics and risks of a host contract in a hybrid financial instrument that is issued in the form of a share. Specifically, the amendments clarify that an entity should consider all relevant terms and features, including the embedded derivative feature being evaluated for bifurcation, in evaluating the nature of the host contract. Furthermore, the amendments clarify that no single term or feature would necessarily determine the economic characteristics and risks of the host contract. Rather, the nature of the host contract depends upon the economic characteristics and risks of the entire hybrid financial instrument. The amendments in this ASU also clarify that, in evaluating the nature of a host contract, an entity should assess the substance of the relevant terms and features (i.e., the relative strength of the debt-like or equity-like terms and features given the facts and circumstances) when considering how to weight those terms and features. The amendments in this ASU are effective for public business entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. Early adoption, including adoption in an interim period, is permitted. The Company does not expect the adoption of ASU 2014-16 to have a material impact on its consolidated financial statements.
	In November 2014, the FASB issued ASU No. 2014-17, “Business Combinations (Topic 805): Pushdown Accounting.” The amendments in ASU provide an acquired entity with an option to apply pushdown accounting in its separate financial statements upon occurrence of an event in which an acquirer obtains control of the acquired entity. An acquired entity may elect the option to apply pushdown accounting in the reporting period in which the change-in-control event occurs. An acquired entity should determine whether to elect to apply pushdown accounting for each individual change-in-control event in which an acquirer obtains control of the acquired entity. If pushdown accounting is not applied in the reporting period in which the change-in-control event occurs, an acquired entity will have the option to elect to apply pushdown accounting in a subsequent reporting period to the acquired entity’s most recent change-in-control event. An election to apply pushdown accounting in a reporting period after the reporting period in which the change-in-control event occurred should be considered a change in accounting principle in accordance with Topic 250, Accounting Changes and Error Corrections. If pushdown accounting is applied to an individual change-in-control event, that election is irrevocable. The amendments in this ASU are effective on November 18, 2014. After the effective date, an acquired entity can make an election to apply the guidance to future change-in-control events or to its most recent change-in-control event. However, if the financial statements for the period in which the most recent change-in-control event occurred already have been issued or made available to be issued, the application of this guidance would be a change in accounting principle. The Company does not expect the adoption of ASU 2014-17 to have a material impact on its consolidated financial statements.
	In January 2015, the FASB issued ASU No. 2015-01, “Income Statement—Extraordinary and Unusual Items (Subtopic 225-20): Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items.” The amendments in this ASU eliminate from U.S. GAAP the concept of extraordinary items. Subtopic 225-20, Income Statement - Extraordinary and Unusual Items, required that an entity separately classify, present, and disclose extraordinary events and transactions. Presently, an event or transaction is presumed to be an ordinary and usual activity of the reporting entity unless evidence clearly supports its classification as an extraordinary item. If an event or transaction meets the criteria for extraordinary classification, an entity is required to segregate the extraordinary item from the results of ordinary operations and show the item separately in the income statement, net of tax, after income from continuing operations. The entity also is required to disclose applicable income taxes and either present or disclose earnings-per-share data applicable to the extraordinary item. The amendments in this ASU are effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2015. Early adoption is permitted provided that the guidance is applied from the beginning of the fiscal year of adoption. The Company does not expect the adoption of ASU 2015-01 to have a material impact on its consolidated financial statements.

Note_1_Summary_of_Significant_1

Note 1 - Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Schedule of Weighted Average Number of Shares [Table Text Block]		2014		2013		2012
	Average number of common shares outstanding		6,948,789		6,947,974		6,942,411
	Effect of dilutive options		10,345		20,419		17,456
	Average number of common shares outstanding used to calculate diluted earnings per common share		6,959,134		6,968,393		6,959,867

Note_3_Securities_Tables

Note 3 - Securities (Tables)	12 Months Ended
	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Available-for-sale Securities [Table Text Block]		31-Dec-14
	Available for sale:	Amortized		Gross		Gross		Fair Value
		Cost		Unrealized		Unrealized
				Gains		Losses
	U.S. Government agencies and corporations		197,740		973		4,494		194,219
	States and political subdivisions		18,529		851		---		19,380
	Mortgage-backed securities		1,830		184		---		2,014
	Corporate debt securities		6,991		140		27		7,104
	Other securities		189		---		62		127
	Total securities available for sale	$	225,279	$	2,148	$	4,583	$	222,844
		31-Dec-13
	Available for sale:	Amortized		Gross		Gross		Fair Value
		Cost		Unrealized		Unrealized
				Gains		Losses
	U.S. Government agencies and corporations		169,818		199		22,163		147,854
	States and political subdivisions		22,830		746		120		23,456
	Mortgage-backed securities		2,627		213		----		2,840
	Corporate debt securities		7,804		97		506		7,395
	Other securities		189		---		22		167
	Total securities available for sale	$	203,268	$	1,255	$	22,811	$	181,712
Investments Classified by Contractual Maturity Date [Table Text Block]		31-Dec-14
		Amortized Cost		Fair Value
	Due in one year or less	$	1,864	$	1,899
	Due after one year through five years		30,930		31,171
	Due after five years through ten years		30,161		30,156
	Due after ten years		162,135		159,491
	No maturity		189		127
		$	225,279	$	222,844
		31-Dec-14
		Amortized		Fair
		Cost		Value
	Due in one year or less	$	1,637	$	1,650
	Due after one year through five years		4,987		5,262
	Due after five years through ten years		24,052		25,181
	Due after ten years		130,776		135,610
		$	161,452	$	167,703
Held-to-maturity Securities [Table Text Block]		31-Dec-14
	Held to maturity:	Amortized		Gross		Gross		Fair Value
		Cost		Unrealized		Unrealized
				Gains		Losses
	U.S. Government agencies and corporations	$	18,922	$	350	$	245	$	19,027
	States and political subdivisions		140,702		6,823		727		146,798
	Mortgage-backed securities		415		51		---		466
	Corporate debt securities		1,413		1		2		1,412
	Total securities held to maturity	$	161,452	$	7,225	$	974	$	167,703
		31-Dec-13
	Held to maturity:	Amortized		Gross		Gross		Fair Value
		Cost		Unrealized		Unrealized
				Gains		Losses
	U.S. Government agencies and corporations	$	13,973	$	280	$	1,448	$	12,805
	States and political subdivisions		149,490		2,971		6,502		145,959
	Mortgage-backed securities		520		53		---		573
	Total securities held to maturity	$	163,983	$	3,304	$	7,950	$	159,337
Schedule of Temporary Impairment Losses, Investments [Table Text Block]		31-Dec-14
		Less Than 12 Months				12 Months or More
		Fair		Unrealized		Fair		Unrealized
		Value		Loss		Value		Loss
	U. S. Government agencies and corporations	$	6,964	$	30	$	156,149	$	4,709
	State and political subdivisions		1,222		35		19,818		692
	Corporate debt securities		450		2		1,948		27
	Other securities		---		---		127		62
	Total temporarily impaired securities	$	8,636	$	67	$	178,042	$	5,490
		31-Dec-13
		Less Than 12 Months				12 Months or More
		Fair		Unrealized		Fair		Unrealized
		Value		Loss		Value		Loss
	U. S. Government agencies and corporations	$	138,324	$	20,400	$	15,796	$	3,211
	State and political subdivisions		58,013		6,131		2,697		491
	Corporate debt securities		5,511		506		---		---
	Other securities		167		22		---		---
	Total temporarily impaired securities	$	202,015	$	27,059	$	18,493	$	3,702

Note_5_Allowance_for_Loan_Loss1

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Tables)	12 Months Ended
	Dec. 31, 2014
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Tables) [Line Items]
Allowance for Credit Losses on Financing Receivables [Table Text Block]		Years ended December 31,
		2014			2013			2012
	Balance at beginning of year	$	8,227		$	8,349		$	8,068
	Loans charged off		(1,860	)		(1,820	)		(2,953	)
	Recoveries of loans previously charged off		255			167			100
	Provision for loan losses		1,641			1,531			3,134
	Balance at end of year	$	8,263		$	8,227		$	8,349
		Activity in the Allowance for Loan Losses by Segment for the year ended December 31, 2014
		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, 2013	$	863		$	1,697		$	3,685		$	989		$	132		$	576		$	285		$	8,227
	Charge-offs		(2	)		(222	)		(1,201	)		(89	)		---			(346	)		---			(1,860	)
	Recoveries		---			---			50			132			---			73			---			255
	Provision for loan losses		(249	)		187			1,003			443			195			299			(237	)		1,641
	Balance, December 31, 2014	$	612		$	1,662		$	3,537		$	1,475		$	327		$	602		$	48		$	8,263
		Activity in the Allowance for Loan Losses by Segment for the year ended December 31, 2013
		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, 2012	$	1,070		$	2,263		$	3,442		$	959		$	142		$	424		$	49		$	8,349
	Charge-offs		(184	)		(256	)		(64	)		(968	)		---			(348	)		---			(1,820	)
	Recoveries		44			1			25			18			---			79			---			167
	Provision for loan losses		(67	)		(311	)		282			980			(10	)		421			236			1,531
	Balance, December 31, 2013	$	863		$	1,697		$	3,685		$	989		$	132		$	576		$	285		$	8,227
		Activity in the Allowance for Loan Losses by Segment for the year ended December 31, 2012
		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, 2011	$	1,079		$	1,245		$	3,515		$	1,473		$	232		$	403		$	121		$	8,068
	Charge-offs		(640	)		(370	)		(1,589	)		(109	)		---			(245	)		---			(2,953	)
	Recoveries		13			8			---			2			---			77			---			100
	Provision for loan losses		618			1,380			1,516			(407	)		(90	)		189			(72	)		3,134
	Balance, December 31, 2012	$	1,070		$	2,263		$	3,442		$	959		$	142		$	424		$	49		$	8,349
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
		31-Dec-14
		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	$	---		$	14		$	258		$	10		$	---		$	---		$	---		$	282
	Collectively evaluated for impairment		612			1,648			3,279			1,465			327			602			48			7,981
	Total	$	612		$	1,662		$	3,537		$	1,475		$	327		$	602		$	48		$	8,263
		Loans by Segment and Evaluation Method as of
		31-Dec-14
		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	$	---		$	819		$	13,624		$	678		$	---		$	---		$	---		$	15,121
	Collectively evaluated for impairment		45,562			146,220			297,138			32,735			41,361			28,182			---			591,198
	Total	$	45,562		$	147,039		$	310,762		$	33,413		$	41,361		$	28,182		$	---		$	606,319
		Allowance for Loan Losses by Segment and Evaluation Method as of
		31-Dec-13
		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	$	---		$	10		$	610		$	4		$	---		$	---		$	---		$	624
	Collectively evaluated for impairment		863			1,687			3,075			985			132			576			285			7,603
	Total	$	863		$	1,697		$	3,685		$	989		$	132		$	576		$	285		$	8,227
		Loans by Segment and Evaluation Method as of
		31-Dec-13
		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	$	---		$	780		$	12,079		$	102		$	---		$	24		$	---		$	12,985
	Collectively evaluated for impairment		45,925			144,719			299,187			31,160			34,220			28,399			---			583,610
	Total	$	45,925		$	145,499		$	311,266		$	31,262		$	34,220		$	28,423		$	---		$	596,595
Schedule of Ratios for Allowance for Loan Losses [Table Text Block]		December 31,
		2014			2013
	Ratio of allowance for loan losses to the end of period loans, net of unearned income and deferred fees		1.36	%		1.38	%
	Ratio of net charge-offs to average loans, net of unearned income and deferred fees		0.27	%		0.28	%
Schedule of Nonperforming Assets [Table Text Block]		December 31,
		2014			2013
	Nonperforming assets:
	Nonaccrual loans	$	3,999		$	5,732
	Restructured loans in nonaccrual		5,288			852
	Total nonperforming loans		9,287			6,584
	Other real estate owned, net		4,744			4,712
	Total nonperforming assets	$	14,031		$	11,296
	Ratio of nonperforming assets to loans, net of unearned income and deferred fees, plus other real estate owned		2.3	%		1.88	%
	Ratio of allowance for loan losses to nonperforming loans(1)		88.97	%		124.95	%
Summary of Past Due 90 Days Loans Or More and Impaired Loans [Table Text Block]		December 31,
		2014			2013
	Loans past due 90 days or more and still accruing	$	207		$	190
	Ratio of loans past due 90 days or more and still accruing to loans, net of unearned income and deferred fees		0.03	%		0.03	%
	Accruing restructured loans	$	6,040		$	6,191
	Impaired loans:
	Impaired loans with no valuation allowance	$	7,615		$	10,372
	Impaired loans with a valuation allowance		7,506			2,613
	Total impaired loans		15,121			12,985
	Valuation allowance		(282	)		(624	)
	Impaired loans, net of allowance	$	14,839		$	12,361
	Average recorded investment in impaired loans(1)	$	16,311		$	16,654
	Income recognized on impaired loans, after designation as impaired	$	473		$	267
	Amount of income recognized on a cash basis	$	---		$	---
Impaired Financing Receivables [Table Text Block]		Impaired Loans as of December 31, 2014
		Principal Balance			(A)			Recorded Investment(1) in (A) for Which There is No Related Allowance			Recorded Investment(1) in (A) for Which There is a Related Allowance			Related Allowance
					Total Recorded Investment(1)
	Consumer Real Estate(2)
	Residential closed-end first liens		530			503			311			192			2
	Residential closed-end junior liens		239			239			---			239			8
	Investor-owned residential real estate		77			77			---			77			4
	Commercial Real Estate(2)
	Multifamily real estate		2,911			2,735			868			1,866			170
	Commercial real estate, owner occupied		4,919			4,821			3,314			1,508			74
	Commercial real estate, other		6,080			6,068			3,072			2,996			14
	Commercial Non Real Estate(2)
	Commercial and Industrial		678			678			50			628			10
	Total	$	15,434		$	15,121		$	7,615		$	7,506		$	282
		Impaired Loans as of December 31, 2013
		Principal Balance			(A)			Recorded Investment(1) in (A) for Which There is No Related Allowance			Recorded Investment(1) in (A) for Which There is a Related Allowance			Related Allowance
					Total Recorded Investment(1)
	Consumer Real Estate(2)
	Residential closed-end first liens		440			442			232			210			3
	Residential closed-end junior liens		259			261			---			261			7
	Investor-owned residential real estate		81			82			82			---			---
	Commercial Real Estate(2)
	Multifamily real estate		3,278			3,274			3,274			---			---
	Commercial real estate, owner occupied		5,643			5,645			3,864			1,781			610
	Commercial real estate, other		3,158			3,158			3,158			---			---
	Commercial Non Real Estate(2)
	Commercial and Industrial		102			103			1			102			4
	Consumer Non Real Estate(2)
	Automobile		24			24			24			---			---
	Total	$	12,985		$	12,989		$	10,635		$	2,354		$	624
Impaired Financing Receivable, Average Investment and Interest Income [Table Text Block]		Average Investment and Interest Income for Impaired Loans
		For the Year Ended
		31-Dec-14
		Average Recorded Investment(1)			Interest Income Recognized
	Consumer Real Estate(2)
	Residential closed-end first liens		555			31
	Residential closed-end junior liens		249			16
	Investor-owned residential real estate		77			5
	Commercial Real Estate(2)
	Multifamily real estate		2,773			---
	Commercial real estate, owner occupied		5,836			203
	Commercial real estate, other		6,114			175
	Commercial Non Real Estate(2)
	Commercial and Industrial		707			43
	Total	$	16,311		$	473
		Average Investment and Interest Income for Impaired Loans
		For the Year Ended
		31-Dec-13
		Average Recorded Investment(1)			Interest Income Recognized
	Real Estate Construction(2)
	Construction, residential	$	40		$	---
	Construction, other		2,885			---
	Consumer Real Estate(2)
	Residential closed-end first liens		364			3
	Residential closed-end junior liens		280			9
	Investor-owned residential real estate		131			6
	Commercial Real Estate(2)
	Multifamily real estate		4,172			---
	Commercial real estate, owner occupied		5,265			136
	Commercial real estate, other		3,369			110
	Commercial Non Real Estate(2)
	Commercial and Industrial		117			3
	Consumer Non Real Estate(2)
	Automobile		31			---
	Total	$	16,654		$	267
		Average Investment and Interest Income for Impaired Loans
		For the Year Ended
		31-Dec-12
		Average Recorded Investment(1)			Interest Income Recognized
	Real Estate Construction(2)
	Construction, residential	$	1,171			---
	Construction, other		4,290			1
	Consumer Real Estate(2)
	Equity lines		101			---
	Residential closed-end first liens		873			2
	Residential closed-end junior liens		234			---
	Commercial Real Estate(2)
	Multifamily real estate		1,466			5
	Commercial real estate, owner occupied		4,806			1
	Commercial Non Real Estate(2)
	Commercial and Industrial		570			---
	Consumer Non Real Estate(2)
	Automobile		4			---
	Other consumer		25			---
	Total	$	13,540		$	9
Past Due Financing Receivables [Table Text Block]	31-Dec-14
		30 – 89 Days Past Due			90 or More Days Past Due			90 or More Days Past Due and Still Accruing			Nonaccruals (Including Impaired Nonaccruals)
	Real Estate Construction
	Construction, residential	$	---		$	---		$	---		$	---
	Construction, other		28			---			---			---
	Consumer Real Estate
	Equity lines		25			---			---			---
	Residential closed-end first liens		719			185			80			105
	Residential closed-end junior liens		74			1			1			---
	Investor-owned residential real estate		336			45			---			59
	Commercial Real Estate
	Multifamily real estate		850			868			---			2,735
	Commercial real estate, owner occupied		---			1,066			102			2,573
	Commercial real estate, other		---			70			---			3,066
	Commercial Non Real Estate
	Commercial and Industrial		153			43			---			749
	Public Sector and IDA
	Public sector and IDA		---			---			---			---
	Consumer Non Real Estate
	Credit cards		3			4			4			---
	Automobile		205			20			20			---
	Other consumer loans		54			---			---			---
	Total	$	2,447		$	2,302		$	207		$	9,287
	31-Dec-13
		30 – 89 Days Past Due			90 or More Days Past Due			90 or More Days Past Due and Still Accruing			Nonaccruals (Including Impaired Nonaccruals)
	Real Estate Construction
	Construction, residential	$	45		$	---		$	---		$	---
	Construction, other		45			---			---			---
	Consumer Real Estate
	Equity lines		---			---			---			---
	Residential closed-end first liens		903			252			128			308
	Residential closed-end junior liens		10			---			---			---
	Investor-owned residential real estate		422			91			---			91
	Commercial Real Estate
	Multifamily real estate		430			3,278			---			3,278
	Commercial real estate, owner occupied		604			2,519			---			2,756
	Commercial real estate, other		32			---			---			---
	Commercial Non Real Estate
	Commercial and Industrial		196			43			---			128
	Public Sector and IDA
	Public sector and IDA		---			---			---			---
	Consumer Non Real Estate
	Credit cards		3			13			13			---
	Automobile		217			26			2			23
	Other consumer loans		49			46			47			---
	Total	$	2,956		$	6,268		$	190		$	6,584
Financing Receivable Credit Quality Indicators [Table Text Block]	31-Dec-14
		Pass			Special Mention			Classified
					(Excluding Impaired)			(Excluding Impaired)
	Real Estate Construction
	Construction, 1-4 family residential	$	14,222		$	---		$	2,265
	Construction, other		29,047			---			28
	Consumer Real Estate
	Equity lines		15,861			59			60
	Closed-end first liens		78,806			1,566			1,412
	Closed-end junior liens		4,258			21			95
	Investor-owned residential real estate		42,781			688			614
	Commercial Real Estate
	Multifamily residential real estate		73,611			1,397			850
	Commercial real estate owner-occupied		125,643			202			2,855
	Commercial real estate, other		90,821			1,177			582
	Commercial Non Real Estate
	Commercial and Industrial		31,247			97			1,390
	Public Sector and IDA
	States and political subdivisions		41,361			---			---
	Consumer Non Real Estate
	Credit cards		5,705			---			---
	Automobile		11,505			93			128
	Other consumer		10,745			---			6
	Total	$	575,613		$	5,300		$	10,285
	31-Dec-13
		Pass			Special Mention			Classified
					(Excluding Impaired)			(Excluding Impaired)
	Real Estate Construction
	Construction, 1-4 family residential	$	17,702		$	163		$	45
	Construction, other		27,971			29			15
	Consumer Real Estate
	Equity lines		16,146			16			---
	Closed-end first liens		82,767			1,007			1,275
	Closed-end junior liens		4,813			109			3
	Investor-owned residential real estate		38,071			105			407
	Commercial Real Estate
	Multifamily residential real estate		67,573			---			958
	Commercial real estate owner-occupied		134,137			2,206			701
	Commercial real estate, other		89,340			1,209			3,063
	Commercial Non Real Estate
	Commercial and Industrial		29,987			878			295
	Public Sector and IDA
	States and political subdivisions		24,220			---			---
	Consumer Non Real Estate
	Credit cards		6,354			---			---
	Automobile		11,428			253			34
	Other consumer		10,253			17			60
	Total	$	570,762		$	5,992		$	6,856
Troubled Debt Restructurings on Financing Receivables [Table Text Block]		Restructurings that occurred during the year ended
		31-Dec-14
		Number of Contracts			Pre-Modification Outstanding Recorded Investment			Post-Modification Outstanding Recorded Investment(1)
	Consumer Real Estate
	Closed-end first liens		1		$	126		$	143
	Commercial Real Estate
	Multifamily residential real estate		1			2,484			2,484
	Commercial real estate owner-occupied		1			184			208
	Commercial real estate non owner-occupied		2			2,967			3,008
	Total		5		$	5,761		$	5,843
		Restructurings that occurred during the year ended
		31-Dec-13
		Number of Contracts			Pre-Modification Outstanding Recorded Investment			Post-Modification Outstanding Recorded Investment(1)
	Consumer Real Estate
	Closed-end first liens		2		$	453		$	525
	Closed-end junior liens		1			262			267
	Commercial Real Estate
	Commercial real estate owner-occupied		1			154			239
	Commercial real estate non owner-occupied		1			3,500			3,500
	Commercial Non Real Estate
	Commercial and Industrial		1			32			45
	Total		6		$	4,401		$	4,576
Subsequent Default [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Tables) [Line Items]
Troubled Debt Restructurings on Financing Receivables [Table Text Block]	Restructurings that defaulted during the year ended December 31, 2013
	that were modified within 12 months prior to default
		Number of Contracts			Recorded Investment(1)
	Consumer Real Estate
	Closed-end first liens		1		$	24
	Closed-end junior liens		1			81
	Commercial Real Estate
	Commercial real estate owner occupied		2			834
	Commercial Non Real Estate
	Commercial and industrial		1			388
	Total		5		$	1,327

Note_6_Premises_and_Equipment_

Note 6 - Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment [Table Text Block]		December 31,
		2014			2013
	Premises	$	13,338		$	14,320
	Furniture and equipment		10,707			10,700
	Premises and equipment	$	24,045		$	25,020
	Accumulated depreciation		(14,914	)		(15,069	)
	Premises and equipment, net	$	9,131		$	9,951

Note_7_Deposits_Tables

Note 7 - Deposits (Tables)	12 Months Ended
	Dec. 31, 2014
Disclosure Text Block [Abstract]
Scheduled Maturities of Time Deposits [Table Text Block]	2015		107,049
	2016		59,857
	2017		18,200
	2018		22,550
	2019		8,990
	Thereafter		100
		$	216,746

Note_8_Employee_Benefit_Plans_

Note 8 - Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Schedule of Defined Benefit Plans Disclosures [Table Text Block]		December 31,
		2014				2013			2012
	Change in benefit obligation
	Projected benefit obligation at beginning of year	$	17,185			$	18,054		$	15,808
	Service cost		524				596			468
	Interest cost		663				617			738
	Actuarial (gain) loss		1,674				(1,149	)		1,554
	Benefits paid		(722	)			(933	)		(514	)
	Projected benefit obligation at end of year	$	19,324			$	17,185		$	18,054
	Change in plan assets
	Fair value of plan assets at beginning of year	$	16,605			$	14,325		$	13,326
	Actual return on plan assets		884				2,225			963
	Employer contribution		363				988			550
	Benefits paid		(722	)			(933	)		(514	)
	Fair value of plan assets at end of year	$	17,130			$	16,605		$	14,325
	Funded status at the end of the year	$	(2,194	)		$	(580	)	$	(3,729	)
	Amounts recognized in the Consolidated Balance Sheet
	Deferred tax asset	$	768			$	203		$	1,305
	Other liabilities		(2,194	)			(580	)		(3,729	)
	Total amounts recognized in the Consolidated Balance Sheet	$	(1,426	)		$	(377	)	$	(2,424	)
	Amounts recognized in accumulated other comprehensive (loss), net
	Net loss	$	(6,922	)		$	(5,282	)	$	(8,202	)
	Prior service cost		669				779			879
	Deferred tax asset		2,163				1,550			2,538
	Amount recognized	$	(4,090	)		$	(2,953	)	$	(4,785	)
	Accrued/Prepaid benefit cost, net
	Benefit obligation	$	(19,324	)		$	(17,185	)	$	(18,054	)
	Fair value of assets		17,130				16,605			14,325
	Unrecognized net actuarial loss		6,922				5,282			8,202
	Unrecognized prior service cost		(669	)			(779	)		(879	)
	Deferred tax liability		(1,395	)			(1,347	)		(1,233	)
	Prepaid benefit cost included in other liabilities	$	2,664			$	2,576		$	2,361
	Components of net periodic benefit cost
	Service cost	$	524			$	596		$	468
	Interest cost		663				617			738
	Expected return on plan assets		(1,112	)			(984	)		(1,075	)
	Amortization of prior service cost		(110	)			(101	)		(101	)
	Recognized net actuarial loss		262				532			508
	Net periodic benefit cost	$	227			$	660		$	538
	Other changes in plan assets and benefit obligations recognized in other comprehensive loss
	Net (gain) loss	$	1,640			$	(2,921	)	$	1,157
	Amortization of prior service cost		110				101			101
	Deferred income tax expense (benefit)		(612	)			987			(440	)
	Total recognized	$	1,138			$	(1,833	)	$	818
	Total recognized in net periodic benefit cost and other comprehensive loss	$	1,977			$	(2,160	)	$	1,796
	Weighted average assumptions at end of the year
	Discount rate used for net periodic pension cost		4.5	%			3.75	%		4.5	%
	Discount rate used for disclosure		3.75	%			4.5	%		3.75	%
	Expected return on plan assets		7.5	%			7.5	%		8	%
	Rate of compensation increase		3	%			3	%		3	%
Schedule of Allocation of Plan Assets [Table Text Block]		Fair Value Measurements at December 31, 2014
		Total				Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
	Asset Category
	Cash	$	737			$	737		$	---		$	---
	Equity securities:
	U. S. companies		8,729				8,729			---			---
	International companies		274				274			---			---
	Equities mutual funds (1)		1,861				1,861			---			---
	U. S. government agencies and corporations		107				---			107			---
	State and political subdivisions		365				---			365			---
	Corporate bonds – investment grade (2)		5,057				---			5,057			---
	Total pension plan assets	$	17,130			$	11,601		$	5,529		$	---
		Fair Value Measurements at December 31, 2013
		Total				Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
	Asset Category
	Cash	$	1,319			$	1,319		$	---		$	---
	Equity securities:
	U. S. companies		8,091				8,091			---			---
	International companies		137				137			---			---
	Equities mutual funds (1)		2,490				2,490			---			---
	U. S. government agencies and corporations		358				---			358			---
	State and political subdivisions		398				---			398			---
	Corporate bonds – investment grade (2)		3,812				---			3,812			---
	Total pension plan assets	$	16,605			$	12,037		$	4,568		$	---
Schedule of Expected Benefit Payments [Table Text Block]
	2015					$	3,467
	2016					$	1,161
	2017					$	1,907
	2018					$	1,002
	2019					$	735
	2020			-	2024	$	4,239

Note_9_Stock_Option_Plan_Table

Note 9 - Stock Option Plan (Tables)	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]							Weighted-
					Weighted-		Average		Aggregate
					Average		Remaining		Intrinsic
	Options	Shares			Exercise		Contractual		Value
					Price		Term
	Outstanding at January 1, 2014		46,000		$	23.96
	Granted		---			---
	Exercised		(2,500	)		23
	Forfeited or expired		(23,000	)		24.93
	Outstanding at December 31, 2014		20,500		$	23		0.85	$	151
	Exercisable at December 31, 2014		20,500		$	23		0.85	$	151

Note_10_Income_Taxes_Tables

Note 10 - Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]		Years ended December 31,
		2014			2013			2012
	Current	$	5,105		$	5,253		$	5,064
	Deferred expense		73			64			181
	Total income tax expense	$	5,178		$	5,317		$	5,245
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]		Years ended December 31,
		2014			2013			2012
	Computed “expected” income tax expense	$	7,732		$	8,087		$	8,047
	Tax-exempt interest income		(2,422	)		(2,592	)		(2,554	)
	Nondeductible interest expense		102			118			139
	Other, net		(234	)		(296	)		(387	)
	Reported income tax expense	$	5,178		$	5,317		$	5,245
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]		December 31,
		2014			2013
	Deferred tax assets:
	Allowance for loan losses and unearned fee income	$	3,098		$	3,169
	Valuation allowance on other real estate owned		37			110
	Deferred compensation and other liabilities		1,897			1,201
	Discount accretion of securities		28			29
	Net unrealized loss on securities available for sale		852			7,545
	Total deferred tax assets	$	5,912		$	12,054
	Deferred tax liabilities:
	Fixed assets	$	(160	)	$	(270	)
	Deposit intangibles		(1,312	)		(1,191	)
	Total deferred tax liabilities		(1,472	)		(1,461	)
	Net deferred tax assets	$	4,440		$	10,593

Note_12_Minimum_Regulatory_Cap1

Note 12 - Minimum Regulatory Capital Requirement (Tables)	12 Months Ended
	Dec. 31, 2014
Disclosure Text Block [Abstract]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations [Table Text Block]		Actual					Minimum Capital					Minimum To Be Well
							Requirement					Capitalized Under
												Prompt Corrective
												Action Provisions
		Amount		Ratio			Amount		Ratio			Amount		Ratio
	31-Dec-14
	Total capital (to risk weighted assets)
	NBI consolidated	$	172,976		24.9	%	$	55,615		8	%	N/A		N/A
	NBB		170,665		24.6	%		55,438		8	%	$	69,298		10	%
	Tier 1 capital (to risk weighted assets)
	NBI consolidated	$	164,713		23.7	%	$	27,807		4	%	N/A		N/A
	NBB		162,402		23.4	%		27,719		4	%	$	41,579		6	%
	Tier 1 capital (to average assets)
	NBI consolidated	$	164,713		14.6	%	$	45,122		4	%	N/A		N/A
	NBB		162,402		14.4	%		45,074		4	%	$	56,342		5	%
		Actual					Minimum Capital					Minimum To Be Well
							Requirement					Capitalized Under
												Prompt Corrective
												Action Provisions
		Amount		Ratio			Amount		Ratio			Amount		Ratio
	31-Dec-13
	Total capital (to risk weighted assets)
	NBI consolidated	$	162,763		23.6	%	$	55,192		8	%	N/A		N/A
	NBB		160,049		23.3	%		54,980		8	%	$	68,726		10	%
	Tier 1 capital (to risk weighted assets)
	NBI consolidated	$	154,536		22.4	%	$	27,596		4	%	N/A		N/A
	NBB		151,822		22.1	%		27,490		4	%	$	41,235		6	%
	Tier 1 capital (to average assets)
	NBI consolidated	$	154,536		14.1	%	$	43,946		4	%	N/A		N/A
	NBB		151,822		13.8	%		43,904		4	%	$	54,880		5	%

Note_13_Condensed_Financial_St1

Note 13 - Condensed Financial Statements of Parent Company (Tables)	12 Months Ended
	Dec. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Balance Sheet [Table Text Block]		December 31,
		2014			2013
	Assets
	Cash due from subsidiaries	$	10		$	27
	Interest-bearing deposits		477			690
	Securities available for sale		127			623
	Securities held to maturity (fair value approximates $450 at December 31, 2014 and $0 at December 31, 2013)		452			---
	Investments in subsidiaries, at equity		165,647			144,513
	Other assets		188			478
	Total assets	$	166,901		$	146,331
	Liabilities and Stockholders’ Equity
	Other liabilities	$	598		$	439
	Stockholders’ equity		166,303			145,892
	Total liabilities and stockholders’ equity	$	166,901		$	146,331
Condensed Income Statement [Table Text Block]		Years Ended December 31,
		2014			2013			2012
	Income
	Dividends from subsidiaries	$	7,853		$	7,882		$	7,639
	Interest on securities – taxable		2			2			5
	Interest on securities – nontaxable		1			19			33
	Realized securities losses, net		---			(94	)		---
	Other income		1,250			1,219			1,213
		$	9,106		$	9,028		$	8,890
	Expenses
	Other expenses	$	2,046		$	1,943		$	1,791
	Income before income tax benefit and equity in undistributed net income of subsidiaries		7,060			7,085			7,099
	Applicable income tax benefit		136			160			136
	Income before equity in undistributed net income of subsidiaries		7,196			7,245			7,235
	Equity in undistributed net income of subsidiaries		9,718			10,545			10,512
	Net income	$	16,914		$	17,790		$	17,747
Condensed Cash Flow Statement [Table Text Block]		Years ended December 31,
		2014			2013			2012
	Cash Flows from Operating Expenses
	Net income	$	16,914		$	17,790		$	17,747
	Adjustments to reconcile net income to net cash provided by operating activities:
	Equity in undistributed net income of subsidiaries		(9,718	)		(10,545	)		(10,512	)
	Amortization of premiums and accretion of discounts, net		1			---			1
	Depreciation expense		9			17			12
	(Gains) Losses on disposal of fixed assets		94			---			---
	Net change in refundable income taxes due from subsidiaries		96			77			77
	Net change in other assets		(63	)		3			(199	)
	Net change in other liabilities		(33	)		20			(124	)
	Losses on securities		---			94			---
	Net cash provided by operating activities		7,300			7,456			7,002
	Cash Flows from Investing Activities
	Net Change in interest-bearing deposits		213			(2	)		(124	)
	Purchases of securities available for sale		---			(612	)		(691	)
	Purchases of securities held to maturity		(453	)		---			---
	Maturities and calls of securities available for sale		455			945			1,352
	Proceeds from sale of premises and equipment		263			---			---
	Net cash provided by investing activities		478			331			537
	Cash Flows from Financing Activities
	Cash dividends paid		(7,853	)		(7,781	)		(7,639	)
	Exercise of stock options		58			---			119
	Net cash used in financing activities		(7,795	)		(7,781	)		(7,520	)
	Net change in cash		17			6			19
	Cash due from subsidiaries at beginning of year		27			21			2
	Cash due from subsidiaries at end of year	$	10		$	27		$	21

Note_14_Financial_Instruments_1

Note 14 - Financial Instruments with Off-Balance Sheet Risk (Tables)	12 Months Ended
	Dec. 31, 2014
Disclosure Text Block Supplement [Abstract]
Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block]		December 31,
		2014		2013
	Financial instruments whose contract amounts represent credit risk:
	Commitments to extend credit	$	144,578	$	133,573
	Standby letters of credit		14,677		15,215
	Mortgage loans sold with potential recourse		10,089		18,257

Note_16_Fair_Value_Measurement1

Note 16 - Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]						Fair Value Measurements at December 31, 2014 Using
	Description	Balance as of				Quoted Prices				Significant				Significant
		December 31,				in Active				Other				Unobservable Inputs
		2014				Markets for				Observable				(Level 3)
						Identical Assets				Inputs
						(Level 1)				(Level 2)
	U.S. Government agencies and corporations		194,219				---				194,219				---
	States and political subdivisions		19,380				---				19,380				---
	Mortgage-backed securities		2,014				---				2,014				---
	Corporate debt securities		7,104				---				7,104				---
	Other securities		127				---				127				---
	Total securities available for sale	$	222,844			$	---			$	222,844			$	---
						Fair Value Measurements at December 31, 2013 Using
	Description	Balance as of				Quoted Prices				Significant				Significant
		December 31,				in Active				Other				Unobservable Inputs
		2013				Markets for				Observable				(Level 3)
						Identical Assets				Inputs
						(Level 1)				(Level 2)
	U.S. Government agencies and corporations		147,854				---				147,854				---
	States and political subdivisions		23,456				---				23,456				---
	Mortgage-backed securities		2,840				---				2,840				---
	Corporate debt securities		7,395				---				7,395				---
	Other securities		167				---				167				---
	Total securities available for sale	$	181,712			$	---			$	181,712			$	---
Fair Value Measurements, Nonrecurring [Table Text Block]								Carrying value
	Date	Description		Balance				Quoted Prices				Significant				Significant
								in Active				Other				Unobservable Inputs
								Markets for				Observable				(Level 3)
								Identical Assets				Inputs
								(Level 1)				(Level 2)
		Assets:
	31-Dec-14	Impaired loans net of valuation allowance		$	7,224			$	---			$	---			$	7,224
	31-Dec-13	Impaired loans net of valuation allowance			1,989				---				---				1,989
								Carrying Value
	Date	Description		Balance				Quoted Prices				Significant				Significant
								in Active				Other				Unobservable Inputs
								Markets for				Observable				(Level 3)
								Identical Assets				Inputs
								(Level 1)				(Level 2)
		Assets:
	31-Dec-14	Other real estate owned net of valuation allowance		$	4,744			$	---			$	---			$	4,744
	31-Dec-13	Other real estate owned net of valuation allowance			4,712				---				---				4,712
Fair Value Inputs, Assets, Quantitative Information [Table Text Block]		Valuation Technique		Unobservable Input		Range
						(Weighted Average)
	Impaired loans	Discounted appraised value		Selling cost(1)			10%	-2
	Impaired loans	Present value of cash flows		Discount rate			5.88%		-	9.50%	-6.15%
		Valuation Technique		Unobservable Input		Range
						(Weighted Average)
	Impaired loans	Discounted appraised value		Selling cost(1)			0%		-	10.00%	-5.00%
	Impaired loans	Present value of cash flows		Discount rate			6.25%		-	9.50%	-6.75%
		Valuation Technique		Unobservable Input		Range
						(Weighted Average)
	Other real estate owned	Discounted appraised value		Selling cost			0%	-1	-	11%	-8.60%
	Other real estate owned	Discounted appraised value		Discount for lack of marketability and age of appraisal			0%		-	48.77%	-20.81%
		Valuation Technique		Unobservable Input		Range
						(Weighted Average)
	Other real estate owned	Discounted appraised value		Selling cost			0%	-1	-	10.00%	-9.83%
	Other real estate owned	Discounted appraised value		Discount for lack of marketability and age of appraisal			0%		-	29.60%	-8.66%
Fair Value, by Balance Sheet Grouping [Table Text Block]		31-Dec-14
						Estimated Fair Value
		Carrying				Level 1				Level 2				Level 3
		Amount
	Financial assets:
	Cash and due from banks	$	12,894			$	12,894			$	---			$	---
	Interest-bearing deposits		102,548				102,548				---				---
	Securities		384,296				---				390,547				---
	Restricted securities		1,089				---				1,089				---
	Mortgage loans held for sale		291				---				291				---
	Loans, net		597,203				---				---				633,063
	Accrued interest receivable		5,748				5,748				---				---
	Bank-owned life insurance		21,797				21,797				---				---
	Financial liabilities:
	Deposits	$	982,428			$	765,682			$	---			$	216,469
	Accrued interest payable		68				68				---				---
		31-Dec-13
						Estimated Fair Value
		Carrying				Level 1				Level 2				Level 3
		Amount
	Financial assets:
	Cash and due from banks	$	13,283			$	13,283			$	---			$	---
	Interest-bearing deposits		98,066				98,066				---				---
	Securities		345,695				---				341,049				---
	Restricted securities		1,414				---				1,414				---
	Mortgage loans held for sale		1,276				---				1,276				---
	Loans, net		587,463				---				---				616,755
	Accrued interest receivable		5,949				5,949				---				---
	Bank-owned life insurance		21,181				21,181				---				---
	Financial liabilities:
	Deposits	$	960,036			$	718,327			$	---			$	247,753
	Accrued interest payable		92				92				---				---

Note_17_Components_of_Accumula1

Note 17 - Components of Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2014
Disclosure Text Block [Abstract]
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, 2011		$	2,646			(3,967	)		(1,321	)
	Unrealized holding loss on available for sale securities net of tax of ($323)			(569	)		---			(569	)
	Reclassification adjustment, net of tax of ($16)			(30	)		---			(30	)
	Net pension loss arising during the period, net of tax of ($405)			---			(752	)		(752	)
	Less amortization of prior service cost included in net periodic pension cost, net of tax of ($35)			---			(66	)		(66	)
	Balance at December 31, 2012			2,047			(4,785	)		(2,738	)
	Unrealized holding loss on available for sale securities net of tax of ($8,665)			(16,091	)		---			(16,091	)
	Reclassification adjustment, net of tax of $19			33			---			33
	Net pension gain arising during the period, net of tax of $1,022			---			1,898			1,898
	Less amortization of prior service cost included in net periodic pension cost, net of tax of ($35)			---			(66	)		(66	)
	Balance at December 31, 2013			(14,011	)	$	(2,953	)	$	(16,964	)
	Unrealized holding gain on available for sale securities net of tax of $6,693			12,430			---			12,430
	Reclassification adjustment, net of tax of ($1)			(1	)		---			(1	)
	Net pension loss arising during the period, net of tax of ($574)			---			(1,066	)		(1,066	)
	Less amortization of prior service cost included in net periodic pension cost, net of tax of ($39)			---			(71	)		(71	)
	Balance at December 31, 2014		$	(1,582	)	$	(4,090	)	$	(5,672	)
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]			December 31,
			2014			2013			2012
	Component of Accumulated Other Comprehensive Income
	Reclassification out of unrealized gains and losses on available-for-sale securities:
	Realized securities (gains) losses, net		$	(2	)	$	52		$	(46	)
	Income tax expense (benefit)			(1	)		19			(16	)
	Realized (gains) losses on available-for-sale securities, net of tax reclassified out of accumulated other comprehensive income		$	(1	)	$	33		$	(30	)
	Amortization of defined benefit pension items:
	Prior service costs(1)		$	(110	)	$	(101	)	$	(101	)
	Income tax expense (benefit)			(39	)		(35	)		(35	)
	Amortization of defined benefit pension items net of tax reclassified out of accumulate other comprehensive income		$	(71	)	$	(66	)	$	(66	)
		-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_and_1

Note 18 - Intangible Assets and Goodwill (Tables)	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets and Goodwill [Table Text Block]		Gross Carrying Value		Accumulated Amortization		Net Carrying Value
	31-Dec-14
	Amortizable core deposit intangibles	$	16,257	$	14,883	$	1,374
	Unamortizable goodwill	$	5,848	$	---	$	5,848
	31-Dec-13
	Amortizable core deposit intangibles	$	16,257	$	13,806	$	2,451
	Unamortizable goodwill	$	5,848	$	---	$	5,848
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	2015	$	999
	2016		257
	2017		68
	2018		50
	Total	$	1,374

Note_1_Summary_of_Significant_2

Note 1 - Summary of Significant Accounting Policies (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
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 (in Dollars)	$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 Charged 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
Goodwill, Impairment Loss (in Dollars)	0	0	0
Noncontrolling Interest, Ownership Percentage by Parent	100.00%
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares)	0	0	0
Advertising Expense (in Dollars)	$174	$194	$169
Building [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	40 years
Furniture and Fixtures [Member] | Minimum [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Furniture and Fixtures [Member] | Maximum [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Computer Equipment [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Minimum [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years
Maximum [Member]
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]
Finite-Lived Intangible Asset, Useful Life	12 years

Note_1_Summary_of_Significant_3

Note 1 - Summary of Significant Accounting Policies (Details) - Weighted Average Number of Shares	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Weighted Average Number of Shares [Abstract]
Average number of common shares outstanding	6,948,789	6,947,974	6,942,411
Effect of dilutive options	10,345	20,419	17,456
Average number of common shares outstanding used to calculate diluted earnings per common share	6,959,134	6,968,393	6,959,867

Note_3_Securities_Details

Note 3 - Securities (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Note 3 - Securities (Details) [Line Items]
Number of Temporarily Impaired Securities	205	286
Available-for-sale and Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	$186,678	$220,508
Unrealized Loss on Securities	5,557	30,761
Available-for-sale Securities Pledged as Collateral	157,951	139,873
Restricted Stock [Member]
Note 3 - Securities (Details) [Line Items]
Restricted Investments	1,089	1,414
Federal Home Loan Bank of Atlanta [Member] | National Bank of Blacksburg [Member]
Note 3 - Securities (Details) [Line Items]
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged		$437,847

Note_3_Securities_Details_Secu

Note 3 - Securities (Details) - Securities Available-for-sale (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, amortized costs	$225,279	$203,268
Securities available-for-sale, gross unrealized gains	2,148	1,255
Securities available-for-sale, gross unrealized losses	4,583	22,811
Securities available-for-sale, fair value	222,844	181,712
US Government Agencies Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, amortized costs	197,740	169,818
Securities available-for-sale, gross unrealized gains	973	199
Securities available-for-sale, gross unrealized losses	4,494	22,163
Securities available-for-sale, fair value	194,219	147,854
US States and Political Subdivisions Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, amortized costs	18,529	22,830
Securities available-for-sale, gross unrealized gains	851	746
Securities available-for-sale, gross unrealized losses		120
Securities available-for-sale, fair value	19,380	23,456
Collateralized Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, amortized costs	1,830	2,627
Securities available-for-sale, gross unrealized gains	184	213
Securities available-for-sale, fair value	2,014	2,840
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, amortized costs	6,991	7,804
Securities available-for-sale, gross unrealized gains	140	97
Securities available-for-sale, gross unrealized losses	27	506
Securities available-for-sale, fair value	7,104	7,395
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Securities available-for-sale, amortized costs	189	189
Securities available-for-sale, gross unrealized losses	62	22
Securities available-for-sale, fair value	$127	$167

Note_3_Securities_Details_Secu1

Note 3 - Securities (Details) - Securities by Contractual Maturity (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Securities by Contractual Maturity [Abstract]
Due in one year or less	$1,864
Due in one year or less	1,899
Due after one year through five years	30,930
Due after one year through five years	31,171
Due after five years through ten years	30,161
Due after five years through ten years	30,156
Due after ten years	162,135
Due after ten years	159,491
No maturity	189
No maturity	127
	225,279
	222,844	181,712
Due in one year or less	1,637
Due in one year or less	1,650
Due after one year through five years	4,987
Due after one year through five years	5,262
Due after five years through ten years	24,052
Due after five years through ten years	25,181
Due after ten years	130,776
Due after ten years	135,610
	161,452	163,983
	$167,703	$159,337

Note_3_Securities_Details_Secu2

Note 3 - Securities (Details) - Securities Held-to-maturity (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Held-to-maturity Securities [Line Items]
Securities held-to-maturity, amortized costs	$161,452	$163,983
Securities held-to-maturity, gross unrealized gains	7,225	3,304
Securities held-to-maturity, gross unrealized losses	974	7,950
Securities held-to-maturity, fair value	167,703	159,337
US Government Agencies Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities held-to-maturity, amortized costs	18,922	13,973
Securities held-to-maturity, gross unrealized gains	350	280
Securities held-to-maturity, gross unrealized losses	245	1,448
Securities held-to-maturity, fair value	19,027	12,805
US States and Political Subdivisions Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities held-to-maturity, amortized costs	140,702	149,490
Securities held-to-maturity, gross unrealized gains	6,823	2,971
Securities held-to-maturity, gross unrealized losses	727	6,502
Securities held-to-maturity, fair value	146,798	145,959
Collateralized Mortgage Backed Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities held-to-maturity, amortized costs	415	520
Securities held-to-maturity, gross unrealized gains	51	53
Securities held-to-maturity, fair value	466	573
Corporate Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Securities held-to-maturity, amortized costs	1,413
Securities held-to-maturity, gross unrealized gains	1
Securities held-to-maturity, gross unrealized losses	2
Securities held-to-maturity, fair value	$1,412

Note_3_Securities_Details_Secu3

Note 3 - Securities (Details) - Securities in a Continuous Loss Position (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Note 3 - Securities (Details) - Securities in a Continuous Loss Position [Line Items]
Securities in a continuous loss position, less than 12 months, fair value	$8,636	$202,015
Securities in a continuous loss position, less than 12 months, unrealized loss	67	27,059
Securities in a continuous loss position, 12 months or more, fair value	178,042	18,493
Securities in a continuous loss position, 12 months or more, unrealized loss	5,490	3,702
US Government Agencies Debt Securities [Member]
Note 3 - Securities (Details) - Securities in a Continuous Loss Position [Line Items]
Securities in a continuous loss position, less than 12 months, fair value	6,964	138,324
Securities in a continuous loss position, less than 12 months, unrealized loss	30	20,400
Securities in a continuous loss position, 12 months or more, fair value	156,149	15,796
Securities in a continuous loss position, 12 months or more, unrealized loss	4,709	3,211
US States and Political Subdivisions Debt Securities [Member]
Note 3 - Securities (Details) - Securities in a Continuous Loss Position [Line Items]
Securities in a continuous loss position, less than 12 months, fair value	1,222	58,013
Securities in a continuous loss position, less than 12 months, unrealized loss	35	6,131
Securities in a continuous loss position, 12 months or more, fair value	19,818	2,697
Securities in a continuous loss position, 12 months or more, unrealized loss	692	491
Corporate Debt Securities [Member]
Note 3 - Securities (Details) - Securities in a Continuous Loss Position [Line Items]
Securities in a continuous loss position, less than 12 months, fair value	450	5,511
Securities in a continuous loss position, less than 12 months, unrealized loss	2	506
Securities in a continuous loss position, 12 months or more, fair value	1,948
Securities in a continuous loss position, 12 months or more, unrealized loss	27
Other Debt Obligations [Member]
Note 3 - Securities (Details) - Securities in a Continuous Loss Position [Line Items]
Securities in a continuous loss position, less than 12 months, fair value		167
Securities in a continuous loss position, less than 12 months, unrealized loss		22
Securities in a continuous loss position, 12 months or more, fair value	127
Securities in a continuous loss position, 12 months or more, unrealized loss	$62

Note_4_Related_Party_Transacti1

Note 4 - Related Party Transactions (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Related Party Transactions [Abstract]
Loans and Leases Receivable, Related Parties	$2,708	$2,913
Loans and Leases Receivable, Related Parties, Additions	1,766
Loans and Leases Receivable, Related Parties, Collections	$1,971

Note_5_Allowance_for_Loan_Loss2

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items]
Interest and Fee Income, Loans and Leases (in Dollars)	$31,217	$32,819	$35,354
Threshold Period for Considering Loans As Special Mention Or Classified		75 days
Financing Receivable, Modifications, Number of Contracts	5	6
Allowance for Credit Losses, Change in Method of Calculating Impairment (in Dollars)	206	11
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	0	5
Financing Receivable, Allowance for Credit Losses, Write-downs (in Dollars)	1,860	1,820	2,953
Interest Capitalized [Member] | Commercial Real Estate, Non Owner Occupied [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items]
Financing Receivable, Modifications, Number of Contracts	2
Interest-only Payments [Member] | Commercial Real Estate, Non Owner Occupied [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items]
Financing Receivable, Modifications, Number of Contracts	2
Consumer Real Estate and Commercial Real Estate Loan [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items]
Financing Receivable, Allowance for Credit Losses, Write-downs (in Dollars)		263
Commercial Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items]
Financing Receivable, Allowance for Credit Losses (in Dollars)		349
Commercial Real Estate, Non Owner Occupied [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items]
Financing Receivable, Modifications, Interest Only Payment Term	1 year
Commercial Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items]
Financing Receivable, Modifications, Number of Contracts		1
Financing Receivable, Modifications, Subsequent Default, Number of Contracts		1
Other Real Estate, Additions (in Dollars)		193
Financing Receivable, Allowance for Credit Losses, Write-downs (in Dollars)	1,201	64	1,589
Consumer Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items]
Financing Receivable, Modifications, Number of Contracts		2
Financing Receivable, Modifications, Subsequent Default, Number of Contracts		1
Financing Receivable, Allowance for Credit Losses, Write-downs (in Dollars)	222	256	370
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down (in Dollars)		71
Commercial [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items]
Financing Receivable, Modifications, Number of Contracts		1
Financing Receivable, Modifications, Subsequent Default, Number of Contracts		1
Nonperforming Financing Receivable [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items]
Interest and Fee Income, Loans and Leases (in Dollars)	$0	$0	$0
Special Mention [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items]
Increase in Percentage of Allocation Loans Rated Special Mention		50.00%
Classified Excluding Impaired [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) [Line Items]
Increase in Percentage of Allocation Loans Rated Classified		100.00%

Note_5_Allowance_for_Loan_Loss3

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Allowance for Loan Losses (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of year	$8,227	$8,349	$8,068
Loans charged off	-1,860	-1,820	-2,953
Recoveries of loans previously charged off	255	167	100
Provision for loan losses	1,641	1,531	3,134
Balance at end of year	8,263	8,227	8,349
Real Estate Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of year	863	1,070	1,079
Loans charged off	-2	-184	-640
Recoveries of loans previously charged off		44	13
Provision for loan losses	-249	-67	618
Balance at end of year	612	863	1,070
Consumer Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of year	1,697	2,263	1,245
Loans charged off	-222	-256	-370
Recoveries of loans previously charged off		1	8
Provision for loan losses	187	-311	1,380
Balance at end of year	1,662	1,697	2,263
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of year	3,685	3,442	3,515
Loans charged off	-1,201	-64	-1,589
Recoveries of loans previously charged off	50	25
Provision for loan losses	1,003	282	1,516
Balance at end of year	3,537	3,685	3,442
Commercial Non Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of year	989	959	1,473
Loans charged off	-89	-968	-109
Recoveries of loans previously charged off	132	18	2
Provision for loan losses	443	980	-407
Balance at end of year	1,475	989	959
Public Sector and IDA [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of year	132	142	232
Provision for loan losses	195	-10	-90
Balance at end of year	327	132	142
Consumer Non Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of year	576	424	403
Loans charged off	-346	-348	-245
Recoveries of loans previously charged off	73	79	77
Provision for loan losses	299	421	189
Balance at end of year	602	576	424
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of year	285	49	121
Provision for loan losses	-237	236	-72
Balance at end of year	$48	$285	$49

Note_5_Allowance_for_Loan_Loss4

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Loans and Allowance for Loan Losses by Evaluation Method (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Loans and Allowance for Loan Losses by Evaluation Method [Line Items]
Allowance for loan losses, individually evaluated for impairment	$282	$624
Allowance for loan losses, collectively evaluated for impairment	7,981	7,603
Allowance for loan losses	8,263	8,227	8,349	8,068
Loans individually evaluated for impairment	15,121	12,985
Loans collectively evaluated for impairment	591,198	583,610
Total loans	606,319	596,595
Real Estate Construction [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Loans and Allowance for Loan Losses by Evaluation Method [Line Items]
Allowance for loan losses, collectively evaluated for impairment	612	863
Allowance for loan losses	612	863	1,070	1,079
Loans collectively evaluated for impairment	45,562	45,925
Total loans	45,562	45,925
Consumer Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Loans and Allowance for Loan Losses by Evaluation Method [Line Items]
Allowance for loan losses, individually evaluated for impairment	14	10
Allowance for loan losses, collectively evaluated for impairment	1,648	1,687
Allowance for loan losses	1,662	1,697	2,263	1,245
Loans individually evaluated for impairment	819	780
Loans collectively evaluated for impairment	146,220	144,719
Total loans	147,039	145,499
Commercial Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Loans and Allowance for Loan Losses by Evaluation Method [Line Items]
Allowance for loan losses, individually evaluated for impairment	258	610
Allowance for loan losses, collectively evaluated for impairment	3,279	3,075
Allowance for loan losses	3,537	3,685	3,442	3,515
Loans individually evaluated for impairment	13,624	12,079
Loans collectively evaluated for impairment	297,138	299,187
Total loans	310,762	311,266
Commercial Non Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Loans and Allowance for Loan Losses by Evaluation Method [Line Items]
Allowance for loan losses, individually evaluated for impairment	10	4
Allowance for loan losses, collectively evaluated for impairment	1,465	985
Allowance for loan losses	1,475	989	959	1,473
Loans individually evaluated for impairment	678	102
Loans collectively evaluated for impairment	32,735	31,160
Total loans	33,413	31,262
Public Sector and IDA [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Loans and Allowance for Loan Losses by Evaluation Method [Line Items]
Allowance for loan losses, collectively evaluated for impairment	327	132
Allowance for loan losses	327	132	142	232
Loans collectively evaluated for impairment	41,361	34,220
Total loans	41,361	34,220
Consumer Non Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Loans and Allowance for Loan Losses by Evaluation Method [Line Items]
Allowance for loan losses, collectively evaluated for impairment	602	576
Allowance for loan losses	602	576	424	403
Loans individually evaluated for impairment		24
Loans collectively evaluated for impairment	28,182	28,399
Total loans	28,182	28,423
Unallocated [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Loans and Allowance for Loan Losses by Evaluation Method [Line Items]
Allowance for loan losses, collectively evaluated for impairment	48	285
Allowance for loan losses	$48	$285	$49	$121

Note_5_Allowance_for_Loan_Loss5

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Ratios for Allowance for Loan Losses	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Ratios for Allowance for Loan Losses [Abstract]
Ratio of allowance for loan losses to the end of period loans, net of unearned income and deferred fees	1.36%	1.38%
Ratio of net charge-offs to average loans, net of unearned income and deferred fees	0.27%	0.28%

Note_5_Allowance_for_Loan_Loss6

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Nonperforming Assets (USD $)	Dec. 31, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Nonperforming Assets [Abstract]
Nonaccrual loans	$3,999		$5,732
Restructured loans in nonaccrual	5,288		852
Total nonperforming loans	9,287		6,584
Other real estate owned, net	4,744		4,712
Total nonperforming assets	$14,031		$11,296
Ratio of nonperforming assets to loans, net of unearned income and deferred fees, plus other real estate owned	2.30%		1.88%
Ratio of allowance for loan losses to nonperforming loans(1)	88.97%	[1]	124.95%	[1]
[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_Loss7

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Loans Past Due 90 Days or More and Impaired Loans (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Loans Past Due 90 Days or More and Impaired Loans [Abstract]
Loans past due 90 days or more and still accruing	$207		$190
Ratio of loans past due 90 days or more and still accruing to loans, net of unearned income and deferred fees	0.03%		0.03%
Accruing restructured loans	6,040		6,191
Impaired loans with no valuation allowance	7,615	[1]	10,635	[1]
Impaired loans with no valuation allowance			10,372
Impaired loans with a valuation allowance	7,506	[1]	2,354	[1]
Impaired loans with a valuation allowance			2,613
Total impaired loans	15,121	[1]	12,989	[1]
Total impaired loans	15,434		12,985
Valuation allowance	-282		-624
Impaired loans, net of allowance	14,839		12,361
Average recorded investment in impaired loans(1)	16,311	[1],[2]	16,654	[1]	13,540	[1]
Income recognized on impaired loans, after designation as impaired	473	[2]	267		9
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]	Only classes with impaired loans are shown.

Note_5_Allowance_for_Loan_Loss8

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans and Associated Reserves (USD $)	Dec. 31, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Impaired [Line Items]
Impaired loans, principal balance	$15,434		$12,985
Impaired loans, recorded investment	15,121	[1]	12,989	[1]
Impaired loans, recorded investment for which there is no related allowance	7,615	[1]	10,635	[1]
Impaired loans, recorded investment for which there is a related allowance	7,506	[1]	2,354	[1]
Impaired loans, related allowance	282		624
Closed-end First Liens [Member] | Consumer Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans, principal balance	530	[2]	440	[2]
Impaired loans, recorded investment	503	[1],[2]	442	[1],[2]
Impaired loans, recorded investment for which there is no related allowance	311	[1],[2]	232	[1],[2]
Impaired loans, recorded investment for which there is a related allowance	192	[1],[2]	210	[1],[2]
Impaired loans, related allowance	2	[2]	3	[2]
Closed-end Junior Liens [Member] | Consumer Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans, principal balance	239	[2]	259	[2]
Impaired loans, recorded investment	239	[1],[2]	261	[1],[2]
Impaired loans, recorded investment for which there is no related allowance		[1],[2]		[1],[2]
Impaired loans, recorded investment for which there is a related allowance	239	[1],[2]	261	[1],[2]
Impaired loans, related allowance	8	[2]	7	[2]
Investor-owned Residential Real Estate [Member] | Consumer Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans, principal balance	77	[2]	81	[2]
Impaired loans, recorded investment	77	[1],[2]	82	[1],[2]
Impaired loans, recorded investment for which there is no related allowance		[1],[2]	82	[1],[2]
Impaired loans, recorded investment for which there is a related allowance	77	[1],[2]		[1],[2]
Impaired loans, related allowance	4	[2]		[2]
Multifamily Real Estate [Member] | Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans, principal balance	2,911	[2]	3,278	[2]
Impaired loans, recorded investment	2,735	[1],[2]	3,274	[1],[2]
Impaired loans, recorded investment for which there is no related allowance	868	[1],[2]	3,274	[1],[2]
Impaired loans, recorded investment for which there is a related allowance	1,866	[1],[2]		[1],[2]
Impaired loans, related allowance	170	[2]		[2]
Commercial Real Estate, Owner Occupied [Member] | Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans, principal balance	4,919	[2]	5,643	[2]
Impaired loans, recorded investment	4,821	[1],[2]	5,645	[1],[2]
Impaired loans, recorded investment for which there is no related allowance	3,314	[1],[2]	3,864	[1],[2]
Impaired loans, recorded investment for which there is a related allowance	1,508	[1],[2]	1,781	[1],[2]
Impaired loans, related allowance	74	[2]	610	[2]
Commercial Real Estate, Other [Member] | Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans, principal balance	6,080	[2]	3,158	[2]
Impaired loans, recorded investment	6,068	[1],[2]	3,158	[1],[2]
Impaired loans, recorded investment for which there is no related allowance	3,072	[1],[2]	3,158	[1],[2]
Impaired loans, recorded investment for which there is a related allowance	2,996	[1],[2]		[1],[2]
Impaired loans, related allowance	14	[2]		[2]
Commercial and Industrial [Member] | Commercial Non Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans, principal balance	678	[2]	102	[2]
Impaired loans, recorded investment	678	[1],[2]	103	[1],[2]
Impaired loans, recorded investment for which there is no related allowance	50	[1],[2]	1	[1],[2]
Impaired loans, recorded investment for which there is a related allowance	628	[1],[2]	102	[1],[2]
Impaired loans, related allowance	10	[2]	4	[2]
Automobile [Member] | Consumer Non Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Impaired loans, principal balance			24	[2]
Impaired loans, recorded investment			24	[1],[2]
Impaired loans, recorded investment for which there is no related allowance			24	[1],[2]
Impaired loans, recorded investment for which there is a related allowance				[1],[2]
Impaired loans, related allowance				[2]
[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_Loss9

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment	$16,311	[1],[2]	$16,654	[1]	$13,540	[1]
Interest income recognized	473	[2]	267		9
Closed-end First Liens [Member] | Consumer Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment	555	[1],[2]	364	[1],[2]	873	[1],[2]
Interest income recognized	31	[2]	3	[2]	2	[2]
Closed-end Junior Liens [Member] | Consumer Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment	249	[1],[2]	280	[1],[2]	234	[1],[2]
Interest income recognized	16	[2]	9	[2]		[2]
Investor-owned Residential Real Estate [Member] | Consumer Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment	77	[1],[2]	131	[1],[2]
Interest income recognized	5	[2]	6	[2]
Multifamily Real Estate [Member] | Commercial Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment	2,773	[1],[2]	4,172	[1],[2]	1,466	[1],[2]
Interest income recognized		[2]		[2]	5	[2]
Commercial Real Estate, Owner Occupied [Member] | Commercial Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment	5,836	[1],[2]	5,265	[1],[2]	4,806	[1],[2]
Interest income recognized	203	[2]	136	[2]	1	[2]
Commercial Real Estate, Other [Member] | Commercial Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment	6,114	[1],[2]	3,369	[1],[2]
Interest income recognized	175	[2]	110	[2]
Commercial and Industrial [Member] | Commercial Non Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment	707	[1],[2]	117	[1],[2]
Interest income recognized	43	[2]	3	[2]
Construction Residential [Member] | Real Estate Construction [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment			40	[1],[2]	1,171	[1],[2]
Interest income recognized				[2]		[2]
Construction Other [Member] | Real Estate Construction [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment			2,885	[1],[2]	4,290	[1],[2]
Interest income recognized				[2]	1	[2]
Automobile [Member] | Consumer Non Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment			31	[1],[2]	4	[1],[2]
Interest income recognized				[2]		[2]
Equity Lines [Member] | Consumer Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment					101	[1],[2]
Interest income recognized						[2]
Commercial [Member] | Commercial Non Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment					570	[1],[2]
Interest income recognized						[2]
Other Consumer Loans [Member] | Consumer Non Real Estate [Member]
Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Impaired Loans, Average Investment and Interest Income Recognized [Line Items]
Average recorded investment					25	[1],[2]
Interest income recognized						[2]
[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.

Recovered_Sheet1

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Past Due and Nonaccrual Loans (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due	$2,447	$2,956
90 or more days past due	2,302	6,268
90 or more days past due and still accruing	207	190
Nonaccrual loans (including impaired nonaccruals)	9,287	6,584
Construction Residential [Member] | Real Estate Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due		45
Construction Other [Member] | Real Estate Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due	28	45
Equity Lines [Member] | Consumer Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due	25
Closed-end First Liens [Member] | Consumer Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due	719	903
90 or more days past due	185	252
90 or more days past due and still accruing	80	128
Nonaccrual loans (including impaired nonaccruals)	105	308
Closed-end Junior Liens [Member] | Consumer Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due	74	10
90 or more days past due	1
90 or more days past due and still accruing	1
Investor-owned Residential Real Estate [Member] | Consumer Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due	336
90 or more days past due	45
Nonaccrual loans (including impaired nonaccruals)	59
Investor-owned Residential Real Estate [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due		422
90 or more days past due		91
Nonaccrual loans (including impaired nonaccruals)		91
Multifamily Real Estate [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due	850	430
90 or more days past due	868	3,278
Nonaccrual loans (including impaired nonaccruals)	2,735	3,278
Commercial Real Estate, Owner Occupied [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due		604
90 or more days past due	1,066	2,519
90 or more days past due and still accruing	102
Nonaccrual loans (including impaired nonaccruals)	2,573	2,756
Commercial Real Estate, Other [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due		32
90 or more days past due	70
Nonaccrual loans (including impaired nonaccruals)	3,066
Commercial and Industrial [Member] | Commercial Non Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due	153	196
90 or more days past due	43	43
Nonaccrual loans (including impaired nonaccruals)	749	128
Credit Card Receivable [Member] | Consumer Non Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due	3	3
90 or more days past due	4	13
90 or more days past due and still accruing	4	13
Automobile [Member] | Consumer Non Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due	205	217
90 or more days past due	20	26
90 or more days past due and still accruing	20	2
Nonaccrual loans (including impaired nonaccruals)		23
Other Consumer Loans [Member] | Consumer Non Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 – 89 days past due	54	49
90 or more days past due		46
90 or more days past due and still accruing		$47

Recovered_Sheet2

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Loans by Credit Quality Indicator (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	$591,198	$583,610
Construction, 1-4 Family Residential [Member] | Real Estate Construction [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	14,222	17,702
Construction, 1-4 Family Residential [Member] | Real Estate Construction [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans		163
Construction, 1-4 Family Residential [Member] | Real Estate Construction [Member] | Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	2,265	45
Construction Other [Member] | Real Estate Construction [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	29,047	27,971
Construction Other [Member] | Real Estate Construction [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans		29
Construction Other [Member] | Real Estate Construction [Member] | Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	28	15
Equity Lines [Member] | Consumer Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	15,861	16,146
Equity Lines [Member] | Consumer Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	59	16
Equity Lines [Member] | Consumer Real Estate [Member] | Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	60
Closed-end First Liens [Member] | Consumer Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	78,806	82,767
Closed-end First Liens [Member] | Consumer Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	1,566	1,007
Closed-end First Liens [Member] | Consumer Real Estate [Member] | Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	1,412	1,275
Closed-end Junior Liens [Member] | Consumer Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	4,258	4,813
Closed-end Junior Liens [Member] | Consumer Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	21	109
Closed-end Junior Liens [Member] | Consumer Real Estate [Member] | Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	95	3
Investor-owned Residential Real Estate [Member] | Consumer Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	42,781	38,071
Investor-owned Residential Real Estate [Member] | Consumer Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	688	105
Investor-owned Residential Real Estate [Member] | Consumer Real Estate [Member] | Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	614	407
Multifamily Real Estate [Member] | Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	73,611	67,573
Multifamily Real Estate [Member] | Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	1,397
Multifamily Real Estate [Member] | Commercial Real Estate [Member] | Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	850	958
Commercial Real Estate, Owner Occupied [Member] | Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	125,643	134,137
Commercial Real Estate, Owner Occupied [Member] | Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	202	2,206
Commercial Real Estate, Owner Occupied [Member] | Commercial Real Estate [Member] | Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	2,855	701
Commercial Real Estate, Other [Member] | Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	90,821	89,340
Commercial Real Estate, Other [Member] | Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	1,177	1,209
Commercial Real Estate, Other [Member] | Commercial Real Estate [Member] | Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	582	3,063
Commercial and Industrial [Member] | Commercial Non Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	31,247	29,987
Commercial and Industrial [Member] | Commercial Non Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	97	878
Commercial and Industrial [Member] | Commercial Non Real Estate [Member] | Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	1,390	295
States & Political Subdivisions [Member] | Public Sector and IDA [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	41,361	24,220
Credit Card Receivable [Member] | Consumer Non Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	5,705	6,354
Automobile [Member] | Consumer Non Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	11,505	11,428
Automobile [Member] | Consumer Non Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	93	253
Automobile [Member] | Consumer Non Real Estate [Member] | Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	128	34
Other Consumer Loans [Member] | Consumer Non Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	10,745	10,253
Other Consumer Loans [Member] | Consumer Non Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans		17
Other Consumer Loans [Member] | Consumer Non Real Estate [Member] | Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	6	60
Real Estate Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	45,562	45,925
Consumer Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	146,220	144,719
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	297,138	299,187
Commercial Non Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	32,735	31,160
Public Sector and IDA [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	41,361	34,220
Consumer Non Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	28,182	28,399
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	575,613	570,762
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	5,300	5,992
Classified Excluding Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Non-impaired gross loans	$10,285	$6,856

Recovered_Sheet3

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Troubled Debt Restructurings (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Financing Receivable, Modifications [Line Items]
Number of contracts	5		6
Pre-modification outstanding principal balance	$5,761		$4,401
Post-modification outstanding principal balance	5,843	[1]	4,576	[1]
Closed-end First Liens [Member] | Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts	1		2
Pre-modification outstanding principal balance	126		453
Post-modification outstanding principal balance	143	[1]	525	[1]
Multifamily Real Estate [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts	1
Pre-modification outstanding principal balance	2,484
Post-modification outstanding principal balance	2,484	[1]
Commercial Real Estate, Owner Occupied [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts	1		1
Pre-modification outstanding principal balance	184		154
Post-modification outstanding principal balance	208	[1]	239	[1]
Commercial Real Estate, Non Owner Occupied [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts	2		1
Pre-modification outstanding principal balance	2,967		3,500
Post-modification outstanding principal balance	3,008	[1]	3,500	[1]
Closed-end Junior Liens [Member] | Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts			1
Pre-modification outstanding principal balance			262
Post-modification outstanding principal balance			267	[1]
Commercial and Industrial [Member] | Commercial Non Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts			1
Pre-modification outstanding principal balance			32
Post-modification outstanding principal balance			$45	[1]
Consumer Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts			2
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of contracts			1
[1]	Post-modification outstanding recorded investment considers amounts immediately following the modification. Amounts do not reflect balances at the end of the period.

Recovered_Sheet4

Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans (Details) - Restructured Loans that Defaulted (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	5
Recorded Investment		$1,327	[1]
Consumer Real Estate [Member] | Closed-end First Liens [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts		1
Recorded Investment		24	[1]
Consumer Real Estate [Member] | Closed-end Junior Liens [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts		1
Recorded Investment		81	[1]
Commercial Real Estate [Member] | Commercial Real Estate, Owner Occupied [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts		2
Recorded Investment		834	[1]
Commercial Non Real Estate [Member] | Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts		1
Recorded Investment		$388	[1]
[1]	Recorded investment at the time the default occurred.

Note_6_Premises_and_Equipment_1

Note 6 - Premises and Equipment (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Abstract]
Depreciation	$732	$726	$764
Operating Leases, Future Minimum Payments Due, Next Twelve Months	275
Operating Leases, Future Minimum Payments, Due in Two Years	267
Operating Leases, Future Minimum Payments, Due in Three Years	244
Operating Leases, Future Minimum Payments, Due in Four Years	244
Operating Leases, Future Minimum Payments, Due in Five Years	196
Operating Leases, Future Minimum Payments, Due Thereafter	$23

Note_6_Premises_and_Equipment_2

Note 6 - Premises and Equipment (Details) - Premises and Equipment (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]
Premises and equipment	$24,045	$25,020
Accumulated depreciation	-14,914	-15,069
Premises and equipment, net	9,131	9,951
Building [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	13,338	14,320
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Premises and equipment	$10,707	$10,700

Note_7_Deposits_Details

Note 7 - Deposits (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Disclosure Text Block [Abstract]
Time Deposits, $250,000 or More	$23,188	$25,885
Deposit Liabilities Reclassified as Loans Receivable	$367	$315

Note_7_Deposits_Details_Maturi

Note 7 - Deposits (Details) - Maturities of Time Deposits (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Maturities of Time Deposits [Abstract]
2015	$107,049
2016	59,857
2017	18,200
2018	22,550
2019	8,990
Thereafter	100
	$216,746	$241,709

Note_8_Employee_Benefit_Plans_1

Note 8 - Employee Benefit Plans (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Note 8 - Employee Benefit Plans (Details) [Line Items]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	100.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount	$273	$282	$279
Age Attained to Be Eligible for ESOP	21 years
Employee Stock Ownership Plan (ESOP), Cash Contributions to ESOP	100	275	370
Employee Stock Ownership Plan (ESOP), Number of Allocated Shares (in Shares)	246,370
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	$246	$194	$151
Equity Securities [Member]
Note 8 - Employee Benefit Plans (Details) [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations	65.00%
Fixed Income Securities [Member]
Note 8 - Employee Benefit Plans (Details) [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations	35.00%
Hedge Funds [Member]
Note 8 - Employee Benefit Plans (Details) [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations	0.00%
Private Equity Funds [Member]
Note 8 - Employee Benefit Plans (Details) [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations	0.00%
Real Estate [Member]
Note 8 - Employee Benefit Plans (Details) [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations	0.00%

Note_8_Employee_Benefit_Plans_2

Note 8 - Employee Benefit Plans (Details) - Defined Benefit Plan Activity (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Change in plan assets
Fair value of plan assets at beginning of year	$16,605
Fair value of plan assets at end of year	17,130	16,605
Other changes in plan assets and benefit obligations recognized in other comprehensive loss
Net (gain) loss	1,066	-1,898	752
Amortization of prior service cost	71	66	66
Pension Plan [Member]
Change in benefit obligation
Projected benefit obligation at beginning of year	17,185	18,054	15,808
Service cost	524	596	468
Interest cost	663	617	738
Actuarial (gain) loss	1,674	-1,149	1,554
Benefits paid	-722	-933	-514
Projected benefit obligation at end of year	19,324	17,185	18,054
Change in plan assets
Fair value of plan assets at beginning of year	16,605	14,325	13,326
Actual return on plan assets	884	2,225	963
Employer contribution	363	988	550
Benefits paid	-722	-933	-514
Fair value of plan assets at end of year	17,130	16,605	14,325
Funded status at the end of the year	-2,194	-580	-3,729
Amounts recognized in the Consolidated Balance Sheet
Deferred tax asset	768	203	1,305
Other liabilities	-2,194	-580	-3,729
Total amounts recognized in the Consolidated Balance Sheet	-1,426	-377	-2,424
Amounts recognized in accumulated other comprehensive (loss), net
Net loss	-6,922	-5,282	-8,202
Prior service cost	669	779	879
Deferred tax asset	2,163	1,550	2,538
Amount recognized	-4,090	-2,953	-4,785
Accrued/Prepaid benefit cost, net
Benefit obligation	-19,324	-17,185	-18,054
Fair value of assets	17,130	16,605	14,325
Unrecognized net actuarial loss	6,922	5,282	8,202
Unrecognized prior service cost	-669	-779	-879
Deferred tax liability	-1,395	-1,347	-1,233
Prepaid benefit cost included in other liabilities	2,664	2,576	2,361
Components of net periodic benefit cost
Service cost	524	596	468
Interest cost	663	617	738
Expected return on plan assets	-1,112	-984	-1,075
Amortization of prior service cost	-110	-101	-101
Recognized net actuarial loss	262	532	508
Net periodic benefit cost	227	660	538
Other changes in plan assets and benefit obligations recognized in other comprehensive loss
Net (gain) loss	1,640	-2,921	1,157
Amortization of prior service cost	110	101	101
Deferred income tax expense (benefit)	-612	987	-440
Total recognized	1,138	-1,833	818
Total recognized in net periodic benefit cost and other comprehensive loss	$1,977	($2,160)	$1,796
Weighted average assumptions at end of the year
Discount rate used for net periodic pension cost	4.50%	3.75%	4.50%
Discount rate used for disclosure	3.75%	4.50%	3.75%
Expected return on plan assets	7.50%	7.50%	8.00%
Rate of compensation increase	3.00%	3.00%	3.00%

Note_8_Employee_Benefit_Plans_3

Note 8 - Employee Benefit Plans (Details) - Fair Value Measurements (USD $)	Dec. 31, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Note 8 - Employee Benefit Plans (Details) - Fair Value Measurements [Line Items]
Pension plan’s assets	$17,130		$16,605
Cash [Member] | Fair Value, Inputs, Level 1 [Member]
Note 8 - Employee Benefit Plans (Details) - Fair Value Measurements [Line Items]
Pension plan’s assets	737		1,319
Cash [Member]
Note 8 - Employee Benefit Plans (Details) - Fair Value Measurements [Line Items]
Pension plan’s assets	737		1,319
Equity Securities US Companies [Member] | Fair Value, Inputs, Level 1 [Member]
Note 8 - Employee Benefit Plans (Details) - Fair Value Measurements [Line Items]
Pension plan’s assets	8,729		8,091
Equity Securities US Companies [Member]
Note 8 - Employee Benefit Plans (Details) - Fair Value Measurements [Line Items]
Pension plan’s assets	8,729		8,091
Equity Securities International Companies [Member] | Fair Value, Inputs, Level 1 [Member]
Note 8 - Employee Benefit Plans (Details) - Fair Value Measurements [Line Items]
Pension plan’s assets	274		137
Equity Securities International Companies [Member]
Note 8 - Employee Benefit Plans (Details) - Fair Value Measurements [Line Items]
Pension plan’s assets	274		137
Equity Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Note 8 - Employee Benefit Plans (Details) - Fair Value Measurements [Line Items]
Pension plan’s assets	1,861	[1]	2,490	[1]
Equity Funds [Member]
Note 8 - Employee Benefit Plans (Details) - Fair Value Measurements [Line Items]
Pension plan’s assets	1,861	[1]	2,490	[1]
US Government Corporations and Agencies Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Note 8 - Employee Benefit Plans (Details) - Fair Value Measurements [Line Items]
Pension plan’s assets	107		358
US Government Corporations and Agencies Securities [Member]
Note 8 - Employee Benefit Plans (Details) - Fair Value Measurements [Line Items]
Pension plan’s assets	107		358
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Note 8 - Employee Benefit Plans (Details) - Fair Value Measurements [Line Items]
Pension plan’s assets	365		398
US States and Political Subdivisions Debt Securities [Member]
Note 8 - Employee Benefit Plans (Details) - Fair Value Measurements [Line Items]
Pension plan’s assets	365		398
Corporate Debt Securities [Member] | External Credit Rating, Investment Grade [Member] | Fair Value, Inputs, Level 2 [Member]
Note 8 - Employee Benefit Plans (Details) - Fair Value Measurements [Line Items]
Pension plan’s assets	5,057	[2]	3,812	[2]
Corporate Debt Securities [Member] | External Credit Rating, Investment Grade [Member]
Note 8 - Employee Benefit Plans (Details) - Fair Value Measurements [Line Items]
Pension plan’s assets	5,057	[2]	3,812	[2]
Fair Value, Inputs, Level 1 [Member]
Note 8 - Employee Benefit Plans (Details) - Fair Value Measurements [Line Items]
Pension plan’s assets	11,601		12,037
Fair Value, Inputs, Level 2 [Member]
Note 8 - Employee Benefit Plans (Details) - Fair Value Measurements [Line Items]
Pension plan’s assets	$5,529		$4,568
[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_Plans_4

Note 8 - Employee Benefit Plans (Details) - Expected Future Benefit Payments (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Expected Future Benefit Payments [Abstract]
2015	$3,467
2016	1,161
2017	1,907
2018	1,002
2019	735
2020	$4,239

Note_9_Stock_Option_Plan_Detai

Note 9 - Stock Option Plan (Details) (Stock Option Plan 1999 [Member], USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock Option Plan 1999 [Member]
Note 9 - Stock Option Plan (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in Shares)	2,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	$15,000	$0	$141,000
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	$0	$0	$0

Note_9_Stock_Option_Plan_Detai1

Note 9 - Stock Option Plan (Details) - Stock Option Activity (Stock Option Plan 1999 [Member], USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014
Stock Option Plan 1999 [Member]
Note 9 - Stock Option Plan (Details) - Stock Option Activity [Line Items]
Outstanding at January 1, 2014	46,000
Outstanding at January 1, 2014	$23.96
Exercised	-2,500
Exercised	$23
Forfeited or expired	-23,000
Forfeited or expired	$24.93
Outstanding at December 31, 2014	20,500
Outstanding at December 31, 2014	$23
Outstanding at December 31, 2014	310 days
Outstanding at December 31, 2014	$151
Exercisable at December 31, 2014	20,500
Exercisable at December 31, 2014	$23
Exercisable at December 31, 2014	310 days
Exercisable at December 31, 2014	$151

Note_10_Income_Taxes_Details

Note 10 - Income Taxes (Details)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%

Note_10_Income_Taxes_Details_A

Note 10 - Income Taxes (Details) - Allocation of Income Tax Expense (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allocation of Income Tax Expense [Abstract]
Current	$5,105	$5,253	$5,064
Deferred expense	73	64	204
Total income tax expense	$5,178	$5,317	$5,245

Note_10_Income_Taxes_Details_R

Note 10 - Income Taxes (Details) - Reconciliation of the “Expected” Income Tax Expense Rate to Actual (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation of the “Expected” Income Tax Expense Rate to Actual [Abstract]
Computed “expected” income tax expense	$7,732	$8,087	$8,047
Tax-exempt interest income	-2,422	-2,592	-2,554
Nondeductible interest expense	102	118	139
Other, net	-234	-296	-387
Reported income tax expense	$5,178	$5,317	$5,245

Note_10_Income_Taxes_Details_T

Note 10 - Income Taxes (Details) - The Components of Net Deferred Tax Assets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Deferred tax assets:
Allowance for loan losses and unearned fee income	$3,098	$3,169
Valuation allowance on other real estate owned	37	110
Deferred compensation and other liabilities	1,897	1,201
Discount accretion of securities	28	29
Net unrealized loss on securities available for sale	852	7,545
Total deferred tax assets	5,912	12,054
Deferred tax liabilities:
Fixed assets	-160	-270
Deposit intangibles	-1,312	-1,191
Total deferred tax liabilities	-1,472	-1,461
Net deferred tax assets	$4,440	$10,593

Note_11_Restrictions_on_Divide1

Note 11 - Restrictions on Dividends (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Disclosure of Restrictions on Dividends, Loans and Advances Disclosure [Abstract]
Proceeds from Dividends Received	$7,853	$7,782	$7,639
Period of Restriction on Retained Net Income Without Prior Approval	2 years
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval	$30,300

Note_12_Minimum_Regulatory_Cap2

Note 12 - Minimum Regulatory Capital Requirement (Details) - Minimum Capital Requirements (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
NBI Consolidated [Member]
Total capital (to risk weighted assets)
Total capital (to risk weighted assets) actual amount	$172,976	$162,763
Total capital (to risk weighted assets) actual ratio	24.90%	23.60%
Total capital (to risk weighted assets) minimum capital requirement amount	55,615	55,192
Total capital (to risk weighted assets) minimum capital requirement ratio	8.00%	8.00%
Tier 1 capital (to risk weighted assets)
Tier 1 capital (to risk weighted assets) actual amount	164,713	154,536
Tier 1 capital (to risk weighted assets) actual ratio	23.70%	22.40%
Tier 1 capital (to risk weighted assets) minimum capital requirement amount	27,807	27,596
Tier 1 capital (to risk weighted assets) minimum capital requirement ratio	4.00%	4.00%
Tier 1 capital (to average assets)
Tier 1 capital (to average assets) actual amount	164,713	154,536
Tier 1 capital (to average assets) actual ratio	14.60%	14.10%
Tier 1 capital (to average assets) minimum capital requirement amount	45,122	43,946
Tier 1 capital (to average assets) minimum capital requirement ratio	4.00%	4.00%
National Bank of Blacksburg [Member]
Total capital (to risk weighted assets)
Total capital (to risk weighted assets) actual amount	170,665	160,049
Total capital (to risk weighted assets) actual ratio	24.60%	23.30%
Total capital (to risk weighted assets) minimum capital requirement amount	55,438	54,980
Total capital (to risk weighted assets) minimum capital requirement ratio	8.00%	8.00%
Total capital (to risk weighted assets) minimum to be well capitalized under prompt corrective action provisions amount	69,298	68,726
Total capital (to risk weighted assets) minimum to be well capitalized under prompt corrective action provisions ratio	10.00%	10.00%
Tier 1 capital (to risk weighted assets)
Tier 1 capital (to risk weighted assets) actual amount	162,402	151,822
Tier 1 capital (to risk weighted assets) actual ratio	23.40%	22.10%
Tier 1 capital (to risk weighted assets) minimum capital requirement amount	27,719	27,490
Tier 1 capital (to risk weighted assets) minimum capital requirement ratio	4.00%	4.00%
Tier 1 capital (to risk weighted assets) minimum to be well capitalized under prompt corrective action provisions amount	41,579	41,235
Tier 1 capital (to risk weighted assets) minimum to be well capitalized under prompt corrective action provisions ratio	6.00%	6.00%
Tier 1 capital (to average assets)
Tier 1 capital (to average assets) actual amount	162,402	151,822
Tier 1 capital (to average assets) actual ratio	14.40%	13.80%
Tier 1 capital (to average assets) minimum capital requirement amount	45,074	43,904
Tier 1 capital (to average assets) minimum capital requirement ratio	4.00%	4.00%
Tier 1 capital (to average assets) minimum to be well capitalized under prompt corrective action provisions amount	$56,342	$54,880
Tier 1 capital (to average assets) minimum to be well capitalized under prompt corrective action provisions ratio	5.00%	5.00%

Note_13_Condensed_Financial_St2

Note 13 - Condensed Financial Statements of Parent Company (Details) - Condensed Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Assets
Cash due from subsidiaries	$12,894	$13,283	$14,783	$11,897
Interest-bearing deposits	102,548	98,066
Securities available for sale	222,844	181,712
Securities held to maturity (fair value approximates $450 at December 31, 2014 and $0 at December 31, 2013)	161,452	163,983
Other assets	7,767	13,341
Total assets	1,154,731	1,110,630
Liabilities and Stockholders’ Equity
Other liabilities	5,932	4,610
Stockholders’ equity	166,303	145,892	150,109	141,299
Total liabilities and stockholders’ equity	1,154,731	1,110,630
Parent Company [Member]
Assets
Cash due from subsidiaries	10	27
Interest-bearing deposits	477	690
Securities available for sale	127	623
Securities held to maturity (fair value approximates $450 at December 31, 2014 and $0 at December 31, 2013)	452
Investments in subsidiaries, at equity	165,647	144,513
Other assets	188	478
Total assets	166,901	146,331
Liabilities and Stockholders’ Equity
Other liabilities	598	439
Stockholders’ equity	166,303	145,892
Total liabilities and stockholders’ equity	$166,901	$146,331

Note_13_Condensed_Financial_St3

Note 13 - Condensed Financial Statements of Parent Company (Details) - Condensed Balance Sheets (Parentheticals) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Condensed Balance Sheet Statements, Captions [Line Items]
Securities held to maturity, fair value	$167,703	$159,337
Parent Company [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Securities held to maturity, fair value	$450	$0

Note_13_Condensed_Financial_St4

Note 13 - Condensed Financial Statements of Parent Company (Details) - Condensed Statements of Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income
Interest on securities – taxable	$6,798	$6,585	$6,460
Interest on securities – nontaxable	5,826	6,388	6,463
Realized securities losses, net	2	-46	60
Other income	868	997	669
Expenses
Income before income tax benefit and equity in undistributed net income of subsidiaries	22,092	23,107	22,992
Applicable income tax benefit	-5,178	-5,317	-5,245
Net income	16,914	17,790	17,747
Parent Company [Member]
Income
Dividends from subsidiaries	7,853	7,882	7,639
Interest on securities – taxable	2	2	5
Interest on securities – nontaxable	1	19	33
Realized securities losses, net		-94
Other income	1,250	1,219	1,213
	9,106	9,028	8,890
Expenses
Other expenses	2,046	1,943	1,791
Income before income tax benefit and equity in undistributed net income of subsidiaries	7,060	7,085	7,099
Applicable income tax benefit	136	160	136
Income before equity in undistributed net income of subsidiaries	7,196	7,245	7,235
Equity in undistributed net income of subsidiaries	9,718	10,545	10,512
Net income	$16,914	$17,790	$17,747

Note_13_Condensed_Financial_St5

Note 13 - Condensed Financial Statements of Parent Company (Details) - Condensed Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash Flows from Operating Expenses
Net income	$16,914	$17,790	$17,747
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of premiums and accretion of discounts, net	138	171	224
Depreciation expense	732	726	764
(Gains) Losses on disposal of fixed assets	94	-11	-3
Net change in other assets	-574	1,760	-8
Net change in other liabilities	-428	83	-175
Losses on securities	-2	46	-60
Cash Flows from Investing Activities
Net Change in interest-bearing deposits	-4,482	-781	1,634
Purchases of securities available for sale	-33,905	-83,996	-171,577
Purchases of securities held to maturity	-6,381	-13,484	-47,803
Maturities and calls of securities available for sale	11,088	63,886	151,175
Proceeds from sale of premises and equipment	453	11
Cash Flows from Financing Activities
Cash dividends paid	-7,853	-7,781	-7,639
Exercise of stock options	58		119
Net change in cash	-389	-1,500	2,886
Parent Company [Member]
Cash Flows from Operating Expenses
Net income	16,914	17,790	17,747
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in undistributed net income of subsidiaries	-9,718	-10,545	-10,512
Amortization of premiums and accretion of discounts, net	1		1
Depreciation expense	9	17	12
(Gains) Losses on disposal of fixed assets	94
Net change in refundable income taxes due from subsidiaries	96	77	77
Net change in other assets	-63	3	-199
Net change in other liabilities	-33	20	-124
Losses on securities		94
Net cash provided by operating activities	7,300	7,456	7,002
Cash Flows from Investing Activities
Net Change in interest-bearing deposits	213	-2	-124
Purchases of securities available for sale		-612	-691
Purchases of securities held to maturity	-453
Maturities and calls of securities available for sale	455	945	1,352
Proceeds from sale of premises and equipment	263
Net cash provided by investing activities	478	331	537
Cash Flows from Financing Activities
Cash dividends paid	-7,853	-7,781	-7,639
Exercise of stock options	58		119
Net cash used in financing activities	-7,795	-7,781	-7,520
Net change in cash	17	6	19
Cash due from subsidiaries at beginning of year	27	21	2
Cash due from subsidiaries at end of year	$10	$27	$21

Note_14_Financial_Instruments_2

Note 14 - Financial Instruments with Off-Balance Sheet Risk (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Note 14 - Financial Instruments with Off-Balance Sheet Risk (Details) [Line Items]
Payments for Origination of Mortgage Loans Held-for-sale	$9,104	$16,737	$22,747
Proceeds from Sale of Mortgage Loans Held-for-sale	10,089	18,257	22,574
Potential Default Period After Sale of Loans to Investor	12 months
Disposal Group, Including Discontinued Operation, Mortgage Loans	291	1,276
Cash, Uninsured Amount	0
Interest Rate Lock Commitments [Member]
Note 14 - Financial Instruments with Off-Balance Sheet Risk (Details) [Line Items]
Other Commitment	$424

Note_14_Financial_Instruments_3

Note 14 - Financial Instruments with Off-Balance Sheet Risk (Details) - Financial Instruments Outstanding Representing Credit Risk (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Commitments to Extend Credit [Member]
Financial instruments whose contract amounts represent credit risk:
Financial instruments whose contract amounts represents credit risk	$144,578	$133,573
Standby Letters of Credit [Member]
Financial instruments whose contract amounts represent credit risk:
Financial instruments whose contract amounts represents credit risk	14,677	15,215
Interest Rate Lock Commitments [Member]
Financial instruments whose contract amounts represent credit risk:
Financial instruments whose contract amounts represents credit risk	$10,089	$18,257

Note_15_Concentrations_of_Cred1

Note 15 - Concentrations of Credit Risk (Details) (Credit Concentration Risk [Member], USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Commercial Real Estate [Member]
Note 15 - Concentrations of Credit Risk (Details) [Line Items]
Concentration Risk, Percentage	52.00%	52.00%
Concentration Risk, Credit Risk, Financial Instrument, Maximum Exposure	$310,762	$311,266,000
College Housing and Professional Office Buildings [Member]
Note 15 - Concentrations of Credit Risk (Details) [Line Items]
Concentration Risk, Percentage	31.00%	32.00%
Concentration Risk, Credit Risk, Financial Instrument, Maximum Exposure	190,055,000	190,866,000
Residential [Member]
Note 15 - Concentrations of Credit Risk (Details) [Line Items]
Concentration Risk, Percentage	24.00%	24.00%
Concentration Risk, Credit Risk, Financial Instrument, Maximum Exposure	147,039,000	145,499,000
Automobile [Member]
Note 15 - Concentrations of Credit Risk (Details) [Line Items]
Concentration Risk, Percentage	2.00%	2.00%
Concentration Risk, Credit Risk, Financial Instrument, Maximum Exposure	$11,554	$11,580,000

Note_16_Fair_Value_Measurement2

Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]
Securities available-for-sale	$222,844	$181,712
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]
Securities available-for-sale	194,219	147,854
US Government Agencies Debt Securities [Member]
Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]
Securities available-for-sale	194,219	147,854
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]
Securities available-for-sale	19,380	23,456
US States and Political Subdivisions Debt Securities [Member]
Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]
Securities available-for-sale	19,380	23,456
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]
Securities available-for-sale	2,014	2,840
Collateralized Mortgage Backed Securities [Member]
Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]
Securities available-for-sale	2,014	2,840
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]
Securities available-for-sale	7,104	7,395
Corporate Debt Securities [Member]
Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]
Securities available-for-sale	7,104	7,395
Other Debt Obligations [Member] | Fair Value, Inputs, Level 2 [Member]
Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]
Securities available-for-sale	127	167
Other Debt Obligations [Member]
Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]
Securities available-for-sale	127	167
Fair Value, Inputs, Level 2 [Member]
Note 16 - Fair Value Measurements (Details) - Assets and Liabilities at Fair Value on Recurring Basis [Line Items]
Securities available-for-sale	$222,844	$181,712

Note_16_Fair_Value_Measurement3

Note 16 - Fair Value Measurements (Details) - Impaired Loans and Other Real Estate Owned Measured at Fair Value on Nonrecurring Basis (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Note 16 - Fair Value Measurements (Details) - Impaired Loans and Other Real Estate Owned Measured at Fair Value on Nonrecurring Basis [Line Items]
Impaired loans	$7,224	$1,989
Other real estate owned	4,744	4,712
Fair Value, Inputs, Level 3 [Member]
Note 16 - Fair Value Measurements (Details) - Impaired Loans and Other Real Estate Owned Measured at Fair Value on Nonrecurring Basis [Line Items]
Impaired loans	7,224	1,989
Other real estate owned	$4,744	$4,712

Note_16_Fair_Value_Measurement4

Note 16 - Fair Value Measurements (Details) - Level 3 Fair Value Measurements	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013
Discounted Appraised Value [Member] | Impaired loans [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Selling cost range	10.00%	[1],[2]	0.00%	[1]
Selling cost weighted average	-10.00%	[1],[2]	0.00%	[1]
Discounted Appraised Value [Member] | Impaired loans [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Selling cost range			10.00%	[1]
Selling cost weighted average			-10.00%	[1]
Discounted Appraised Value [Member] | Impaired loans [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Selling cost range			5.00%	[1]
Selling cost weighted average			-5.00%	[1]
Discounted Appraised Value [Member] | Impaired loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Valuation technique	Discounted appraised value		Discounted appraised value
Discounted rate range	Discounted appraised value		Discounted appraised value
Discounted Appraised Value [Member] | Other Real Estate Owned [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Valuation technique	0%		0%
Selling cost range	0.00%	[1]	0.00%	[1]
Selling cost weighted average	0.00%	[1]	0.00%	[1]
Discounted rate range	0%		0%
Discounted Appraised Value [Member] | Other Real Estate Owned [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Valuation technique	48.77%		29.60%
Selling cost range	11.00%		10.00%
Selling cost weighted average	-11.00%		-10.00%
Discounted rate range	48.77%		29.60%
Discounted Appraised Value [Member] | Other Real Estate Owned [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Selling cost range	8.60%		9.83%
Selling cost weighted average	-8.60%		-9.83%
Discounted rate weighted average	-20.81%		-8.66%
Discounted Appraised Value [Member] | Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Valuation technique	Discounted appraised value		Discounted appraised value
Discounted rate range	Discounted appraised value		Discounted appraised value
Present Value of Cash Flows [Member] | Impaired loans [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Valuation technique	5.88%		6.25%
Discounted rate range	5.88%		6.25%
Present Value of Cash Flows [Member] | Impaired loans [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Valuation technique	9.50%		9.50%
Discounted rate range	9.50%		9.50%
Present Value of Cash Flows [Member] | Impaired loans [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discounted rate weighted average	-6.15%		-6.75%
Present Value of Cash Flows [Member] | Impaired loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Valuation technique	Present value of cash flows		Present value of cash flows
Discounted rate range	Present value of cash flows		Present value of cash flows
[1]	Impaired loans that are collateral-dependent are valued using the fair value of collateral. The valuation is discounted for selling costs if repayment of the loan is dependent on the sale of the collateral. If repayment will come from rental income of the property, the valuation is not discounted for selling costs.
[2]	Only one loan was valued using the collateral method as of December 31, 2014.

Note_16_Fair_Value_Measurement5

Note 16 - Fair Value Measurements (Details) - Estimated Fair Values and Related Carrying Amounts of Financial Instruments (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Financial assets:
Cash and due from banks	$12,894	$13,283	$14,783	$11,897
Interest-bearing deposits	102,548	98,066
Securities	384,296	345,695
Restricted securities	1,089	1,414
Mortgage loans held for sale	291	1,276
Loans, net	597,203	587,463
Accrued interest receivable	5,748	5,949
Bank-owned life insurance	21,797	21,181
Financial liabilities:
Deposits	982,428	960,036
Accrued interest payable	68	92
Fair Value, Inputs, Level 1 [Member]
Financial assets:
Cash and due from banks	12,894	13,283
Interest-bearing deposits	102,548	98,066
Accrued interest receivable	5,748	5,949
Bank-owned life insurance	21,797	21,181
Financial liabilities:
Deposits	765,682	718,327
Accrued interest payable	68	92
Fair Value, Inputs, Level 2 [Member]
Financial assets:
Securities	390,547	341,049
Restricted securities	1,089	1,414
Mortgage loans held for sale	291	1,276
Fair Value, Inputs, Level 3 [Member]
Financial assets:
Loans, net	633,063	616,755
Financial liabilities:
Deposits	$216,469	$247,753

Note_17_Components_of_Accumula2

Note 17 - Components of Accumulated Other Comprehensive Income (Details) - Components of Accumulated Other Comprehensive Income (Loss) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	($5,672)	($16,964)	($2,738)	($1,321)
Unrealized holding gain (loss) on available for sale securities net of tax	12,430	-16,091	-569
Reclassification adjustment, net of tax	-1	33	-30
Net pension gain (loss) arising during the period, net of tax	-1,066	1,898	-752
Less amortization of prior service cost included in net periodic pension cost, net of tax	-71	-66	-66
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	-1,582	-14,011	2,047	2,646
Unrealized holding gain (loss) on available for sale securities net of tax	12,430	-16,091	-569
Reclassification adjustment, net of tax	-1	33	-30
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	-4,090	-2,953	-4,785	-3,967
Net pension gain (loss) arising during the period, net of tax	-1,066	1,898	-752
Less amortization of prior service cost included in net periodic pension cost, net of tax	($71)	($66)	($66)

Note_17_Components_of_Accumula3

Note 17 - Components of Accumulated Other Comprehensive Income (Details) - Components of Accumulated Other Comprehensive Income (Loss) (Parentheticals) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized holding gain (loss) on available for sale securities, tax	$6,693	($8,665)	($323)
Reclassification adjustment, tax	-1	19	-16
Net pension gain (loss) arising during the period, tax	-574	1,022	-405
Less amortization of prior service cost included in net periodic pension cost, tax	($39)	($35)	($35)

Note_17_Components_of_Accumula4

Note 17 - Components of Accumulated Other Comprehensive Income (Details) - Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Component of Accumulated Other Comprehensive Income
Income tax expense (benefit)	($1)		$19		($16)
Realized (gains) losses on available-for-sale securities, net of tax reclassified out of accumulated other comprehensive income	1		-33		30
Income tax expense (benefit)	39		35		35
Amortization of defined benefit pension items net of tax reclassified out of accumulate other comprehensive income	-71		-66		-66
Reclassification out of Accumulated Other Comprehensive Income [Member]
Component of Accumulated Other Comprehensive Income
Realized securities (gains) losses, net	-2		52		-46
Income tax expense (benefit)	-1		19		-16
Realized (gains) losses on available-for-sale securities, net of tax reclassified out of accumulated other comprehensive income	-1		33		-30
Prior service costs(1)	-110	[1]	-101	[1]	-101	[1]
Income tax expense (benefit)	-39		-35		-35
Amortization of defined benefit pension items net of tax reclassified out of accumulate other comprehensive income	($71)		($66)		($66)
[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_and_2

Note 18 - Intangible Assets and Goodwill (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Asset Impairment	$0	$0	$0

Note_18_Intangible_Assets_and_3

Note 18 - Intangible Assets and Goodwill (Details) - Goodwill and Intangible Assets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Note 18 - Intangible Assets and Goodwill (Details) - Goodwill and Intangible Assets [Line Items]
Unamortizable goodwill, gross carrying value	$5,848	$5,848
Unamortizable goodwill, net carrying value	5,848	5,848
Core Deposits [Member]
Note 18 - Intangible Assets and Goodwill (Details) - Goodwill and Intangible Assets [Line Items]
Amortizable core deposit intangibles, gross carrying value	16,257	16,257
Amortizable core deposit intangibles, accumulated amortization	14,883	13,806
Amortizable core deposit intangibles, net carrying value	$1,374	$2,451

Note_18_Intangible_Assets_and_4

Note 18 - Intangible Assets and Goodwill (Details) - Estimated Amortization Expense of Core Deposit Intangibles (Core Deposits [Member], USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Core Deposits [Member]
Note 18 - Intangible Assets and Goodwill (Details) - Estimated Amortization Expense of Core Deposit Intangibles [Line Items]
2015	$999
2016	257
2017	68
2018	50
Total	$1,374	$2,451