$NKSH
NATIONAL BANKSHARES INC Stock $nksh

$nksh Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-Q Financial Statement

#000143774920022905 Filed on November 06, 2020

Income Statement

Concept	2020 Q4	2020 Q3	2019 Q3
Revenue		$10.71M	$11.29M
YoY Change		-5.14%	3.13%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$180.0K	$180.0K	$190.0K
YoY Change	-5.26%	-5.26%	-5.0%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense		$1.420M	$1.865M
YoY Change		-23.86%	49.8%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$5.970M	$4.940M	$5.040M
YoY Change	4.01%	-1.98%	2.27%
Income Tax	$1.020M	$772.0K	$788.0K
% Of Pretax Income	17.09%	15.63%	15.63%
Net Earnings	$4.950M	$4.168M	$4.252M
YoY Change	3.56%	-1.98%	0.02%
Net Earnings / Revenue		38.92%	37.67%
Basic Earnings Per Share		$0.64	$0.65
Diluted Earnings Per Share	$766.3K	$0.64	$0.65
COMMON SHARES
Basic Shares Outstanding	6.479M	6.490M
Diluted Shares Outstanding

Balance Sheet

Concept	2020 Q4	2020 Q3	2019 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$13.15M	$10.59M	$14.21M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$10.04M	$10.02M	$8.993M
YoY Change	12.51%	11.46%	3.05%
Goodwill	$5.848M	$5.848M	$5.848M
YoY Change	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments	$189.7M
YoY Change	3.61%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$1.520B	$1.435B	$1.273B
YoY Change	14.97%	12.79%	1.15%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$100.0K	$100.0K	$100.0K
YoY Change	0.0%	0.0%	-50.0%
Accrued Expenses	$2.000M		$2.400M
YoY Change	-13.04%
Deferred Revenue
YoY Change
Short-Term Debt
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$2.100M	$100.0K	$2.500M
YoY Change	-12.5%	-96.0%	1150.0%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$19.90M	$19.60M	$14.20M
YoY Change	25.16%	38.03%	10.94%
Total Long-Term Liabilities	$19.90M	$19.60M	$14.20M
YoY Change	25.16%	38.03%	10.94%
TOTAL LIABILITIES
Total Short-Term Liabilities	$2.100M	$100.0K	$2.500M
Total Long-Term Liabilities	$19.90M	$19.60M	$14.20M
Total Liabilities	$1.319B	$1.233B	$1.085B
YoY Change	15.9%	13.7%	1.36%
SHAREHOLDERS EQUITY
Retained Earnings	$189.5M	$190.9M	$184.0M
YoY Change	2.95%	3.74%	-4.87%
Common Stock	$8.040M	$8.112M	$8.112M
YoY Change	-0.89%	0.0%	-6.74%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$200.6M	$202.2M	$188.0M
YoY Change
Total Liabilities & Shareholders Equity	$1.520B	$1.435B	$1.273B
YoY Change	14.97%	12.79%	1.15%

Cashflow Statement

Concept	2020 Q4	2020 Q3	2019 Q3
OPERATING ACTIVITIES
Net Income	$4.950M	$4.168M	$4.252M
YoY Change	3.56%	-1.98%	0.02%
Depreciation, Depletion And Amortization	$180.0K	$180.0K	$190.0K
YoY Change	-5.26%	-5.26%	-5.0%
Cash From Operating Activities	$3.640M	$3.730M	$4.400M
YoY Change	-43.74%	-15.23%	-11.82%
INVESTING ACTIVITIES
Capital Expenditures	-$190.0K	-$240.0K	-$170.0K
YoY Change	35.71%	41.18%	13.33%
Acquisitions
YoY Change
Other Investing Activities	-$78.08M	-$180.0K	-$4.900M
YoY Change	36.27%	-96.33%	-184.78%
Cash From Investing Activities	-$78.27M	-$430.0K	-$5.070M
YoY Change	36.26%	-91.52%	-190.21%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	77.19M	-6.030M	-2.300M
YoY Change	64.06%	162.17%	-80.17%
NET CHANGE
Cash From Operating Activities	3.640M	3.730M	4.400M
Cash From Investing Activities	-78.27M	-430.0K	-5.070M
Cash From Financing Activities	77.19M	-6.030M	-2.300M
Net Change In Cash	2.560M	-2.730M	-2.970M
YoY Change	-165.31%	-8.08%	200.0%
FREE CASH FLOW
Cash From Operating Activities	$3.640M	$3.730M	$4.400M
Capital Expenditures	-$190.0K	-$240.0K	-$170.0K
Free Cash Flow	$3.830M	$3.970M	$4.570M
YoY Change	-42.06%	-13.13%	-11.09%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	6478997
CY2020Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q3	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue	0
CY2019Q4	us-gaap	Preferred Stock No Par Value PreferredStockNoParValue	0
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CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000
CY2020Q3	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2019Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0
CY2019Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0
CY2020Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1.25
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CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	10000000
CY2020Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	6489574
CY2020Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	6489574
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	6489574
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	6489574
CY2020Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	601000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	146000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	3000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	34000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	3127000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	2149000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	20000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	38000	USD
CY2019Q3	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	16000
	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	468400
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.67
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.67
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	3107000	USD
CY2020Q3	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	0	pure
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	0	pure
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	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	1	pure
	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	0	USD
CY2020Q3	us-gaap	Cash And Due From Banks CashAndDueFromBanks	10593000	USD
CY2019Q4	us-gaap	Cash And Due From Banks CashAndDueFromBanks	10290000	USD
CY2020Q3	us-gaap	Interest Bearing Deposits In Banks InterestBearingDepositsInBanks	68779000	USD
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CY2019Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	435263000	USD
CY2020Q3	us-gaap	Investment Owned Restricted Cost InvestmentOwnedRestrictedCost	1279000	USD
CY2019Q4	us-gaap	Investment Owned Restricted Cost InvestmentOwnedRestrictedCost	1220000	USD
CY2020Q3	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group LoansReceivableHeldForSaleNetNotPartOfDisposalGroup	3690000	USD
CY2019Q4	us-gaap	Loans Receivable Held For Sale Net Not Part Of Disposal Group LoansReceivableHeldForSaleNetNotPartOfDisposalGroup	905000	USD
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CY2019Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	726588000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	10024000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	8919000	USD
CY2020Q3	us-gaap	Interest Receivable InterestReceivable	5238000	USD
CY2019Q4	us-gaap	Interest Receivable InterestReceivable	4285000	USD
CY2020Q3	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	1553000	USD
CY2019Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	1612000	USD
CY2020Q3	us-gaap	Goodwill Goodwill	5848000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	5848000	USD
CY2020Q3	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	36226000	USD
CY2019Q4	us-gaap	Bank Owned Life Insurance BankOwnedLifeInsurance	35567000	USD
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CY2019Q4	us-gaap	Assets Assets	1321837000	USD
CY2020Q3	us-gaap	Noninterest Bearing Deposit Liabilities Domestic NoninterestBearingDepositLiabilitiesDomestic	270237000	USD
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CY2020Q3	us-gaap	Liabilities Liabilities	1233304000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	1138111000	USD
CY2020Q3	us-gaap	Common Stock Value CommonStockValue	8112000	USD
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	8112000	USD
CY2020Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	190901000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	184120000	USD
CY2020Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	3181000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-8506000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	202194000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	183726000	USD
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CY2019Q3	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	407000	USD
CY2020Q3	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	1572000	USD
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CY2019Q3	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	523000	USD
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CY2020Q3	us-gaap	Interest Expense InterestExpense	1420000	USD
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CY2019Q3	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	9423000	USD
CY2020Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	154000	USD
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CY2020Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	219000	USD
CY2019Q3	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	230000	USD
CY2020Q3	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	423000	USD
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CY2019Q3	us-gaap	Occupancy Net OccupancyNet	468000	USD
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CY2019Q3	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	823000	USD
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CY2020Q3	nksh	Net Costs Of Other Real Estate Owned NetCostsOfOtherRealEstateOwned	18000	USD
CY2019Q3	nksh	Net Costs Of Other Real Estate Owned NetCostsOfOtherRealEstateOwned	17000	USD
CY2020Q3	nksh	Taxother Taxother	331000	USD
CY2019Q3	nksh	Taxother Taxother	343000	USD
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CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	772000	USD
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CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	4168000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	4252000	USD
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.64
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CY2019Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	128000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2245000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	416000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	6413000	USD
CY2019Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	4668000	USD
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	25491000	USD
	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	25277000	USD
	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	248000	USD
	us-gaap	Interest Income Deposits With Financial Institutions InterestIncomeDepositsWithFinancialInstitutions	1048000	USD
	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	5791000	USD
	us-gaap	Interest Income Securities Taxable InterestIncomeSecuritiesTaxable	4851000	USD
	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	1316000	USD
	us-gaap	Interest Income Securities Tax Exempt InterestIncomeSecuritiesTaxExempt	2543000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	32846000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	33719000	USD
	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	1476000	USD
	us-gaap	Interest Expense Time Deposits InterestExpenseTimeDeposits	1239000	USD
	us-gaap	Interest Expense Other Domestic Deposits InterestExpenseOtherDomesticDeposits	3338000	USD
	us-gaap	Interest Expense Other Domestic Deposits InterestExpenseOtherDomesticDeposits	4333000	USD
	us-gaap	Interest Expense InterestExpense	4814000	USD
	us-gaap	Interest Expense InterestExpense	5572000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	28032000	USD
	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	28147000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1985000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	350000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	26047000	USD
	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	27797000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	659000	USD
	us-gaap	Bank Owned Life Insurance Income BankOwnedLifeInsuranceIncome	681000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	1233000	USD
	us-gaap	Noninterest Income Other Operating Income NoninterestIncomeOtherOperatingIncome	1368000	USD
	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	96000	USD
	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	182000	USD
	us-gaap	Noninterest Income NoninterestIncome	5806000	USD
	us-gaap	Noninterest Income NoninterestIncome	6443000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	10882000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	11163000	USD
	us-gaap	Occupancy Net OccupancyNet	1360000	USD
	us-gaap	Occupancy Net OccupancyNet	1410000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	2396000	USD
	us-gaap	Information Technology And Data Processing InformationTechnologyAndDataProcessing	2363000	USD
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	127000	USD
	us-gaap	Federal Deposit Insurance Corporation Premium Expense FederalDepositInsuranceCorporationPremiumExpense	167000	USD
	nksh	Net Costs Of Other Real Estate Owned NetCostsOfOtherRealEstateOwned	36000	USD
	nksh	Net Costs Of Other Real Estate Owned NetCostsOfOtherRealEstateOwned	45000	USD
	nksh	Taxother Taxother	1009000	USD
	nksh	Taxother Taxother	990000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	2854000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	3166000	USD
	us-gaap	Noninterest Expense NoninterestExpense	18664000	USD
	us-gaap	Noninterest Expense NoninterestExpense	19304000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	13189000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	14936000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2060000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2247000	USD
	us-gaap	Net Income Loss NetIncomeLoss	11129000	USD
	us-gaap	Net Income Loss NetIncomeLoss	12689000	USD
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.71
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.92
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.71
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.92
	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	6489574
	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	6611354
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.67
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.67
	us-gaap	Net Income Loss NetIncomeLoss	11129000	USD
	us-gaap	Net Income Loss NetIncomeLoss	12689000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	11763000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	8089000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	76000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	144000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	11687000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	7945000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	22816000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	20634000	USD
CY2019Q2	us-gaap	Stockholders Equity StockholdersEquity	183848000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	4252000	USD
CY2019Q3	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	528000	USD
CY2019Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	416000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	187988000	USD
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	195781000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	4168000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2245000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	202194000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	190238000	USD
	us-gaap	Net Income Loss NetIncomeLoss	12689000	USD
	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	18525000	USD
	us-gaap	Dividends Common Stock DividendsCommonStock	4359000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	7945000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	187988000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	183726000	USD
	us-gaap	Net Income Loss NetIncomeLoss	11129000	USD
	us-gaap	Dividends Common Stock DividendsCommonStock	4348000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	11687000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	202194000	USD
	us-gaap	Net Income Loss NetIncomeLoss	11129000	USD
	us-gaap	Net Income Loss NetIncomeLoss	12689000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1985000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	350000	USD
	us-gaap	Depreciation Depreciation	529000	USD
	us-gaap	Depreciation Depreciation	552000	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-1016000	USD
	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-52000	USD
	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	2000	USD
	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	6000	USD
	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	96000	USD
	us-gaap	Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments	182000	USD
	nksh	Losses And Write Downs On Other Real Estate Owned LossesAndWriteDownsOnOtherRealEstateOwned	13000	USD
	nksh	Losses And Write Downs On Other Real Estate Owned LossesAndWriteDownsOnOtherRealEstateOwned	-5000	USD
	nksh	Gain Loss On Sale Of Repossessed Assets GainLossOnSaleOfRepossessedAssets	-1000	USD
	nksh	Gain Loss On Sale Of Repossessed Assets GainLossOnSaleOfRepossessedAssets	-4000	USD
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	659000	USD
	us-gaap	Life Insurance Corporate Or Bank Owned Change In Value LifeInsuranceCorporateOrBankOwnedChangeInValue	681000	USD
	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	27929000	USD
	us-gaap	Payments For Origination Of Mortgage Loans Held For Sale PaymentsForOriginationOfMortgageLoansHeldForSale	15191000	USD
	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	25560000	USD
	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	13127000	USD
	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	416000	USD
	us-gaap	Gain Loss On Sale Of Mortgage Loans GainLossOnSaleOfMortgageLoans	197000	USD
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	953000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-58000	USD
	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	44000	USD
	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-927000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	136000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-416000	USD
	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	592000	USD
	nksh	Proceeds From Sale Of Repossessed Assets ProceedsFromSaleOfRepossessedAssets	30000	USD
	nksh	Proceeds From Sale Of Repossessed Assets ProceedsFromSaleOfRepossessedAssets	40000	USD
	us-gaap	Proceeds From Recoveries Of Loan Previously Charged Off ProceedsFromRecoveriesOfLoanPreviouslyChargedOff	219000	USD
	us-gaap	Proceeds From Recoveries Of Loan Previously Charged Off ProceedsFromRecoveriesOfLoanPreviouslyChargedOff	218000	USD
	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	1632000	USD
	us-gaap	Payments For Proceeds From Productive Assets PaymentsForProceedsFromProductiveAssets	893000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-99328000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-4238000	USD
	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	-25020000	USD
	us-gaap	Increase Decrease In Time Deposits IncreaseDecreaseInTimeDeposits	22787000	USD
	us-gaap	Increase Decrease In Other Deposits IncreaseDecreaseInOtherDeposits	118849000	USD
	us-gaap	Increase Decrease In Other Deposits IncreaseDecreaseInOtherDeposits	-6702000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	192000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	452000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	10150000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	12361000	USD
	us-gaap	Proceeds From Payments For In Interest Bearing Deposits In Banks ProceedsFromPaymentsForInInterestBearingDepositsInBanks	8102000	USD
	us-gaap	Proceeds From Payments For In Interest Bearing Deposits In Banks ProceedsFromPaymentsForInInterestBearingDepositsInBanks	-91999000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	116567000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Held To Maturity Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities	235900000	USD
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	154781000	USD
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	134854000	USD
	us-gaap	Increase Decrease Of Restricted Investments IncreaseDecreaseOfRestrictedInvestments	59000	USD
	us-gaap	Payments To Acquire Loans Receivable PaymentsToAcquireLoansReceivable	4273000	USD
	us-gaap	Payments To Acquire Loans Receivable PaymentsToAcquireLoansReceivable	673000	USD
	us-gaap	Proceeds From Principal Repayments On Loans And Leases Held For Investment ProceedsFromPrincipalRepaymentsOnLoansAndLeasesHeldForInvestment	122000	USD
	us-gaap	Proceeds From Principal Repayments On Loans And Leases Held For Investment ProceedsFromPrincipalRepaymentsOnLoansAndLeasesHeldForInvestment	3219000	USD
	nksh	Proceeds From Loans And Leases Originations And Principal Collections ProceedsFromLoansAndLeasesOriginationsAndPrincipalCollections	-63695000	USD
	nksh	Proceeds From Loans And Leases Originations And Principal Collections ProceedsFromLoansAndLeasesOriginationsAndPrincipalCollections	-15788000	USD
	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	72000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	18525000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	4348000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	4359000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	89481000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-6799000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	303000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	1324000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	10290000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	12882000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	10593000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	14206000	USD
	us-gaap	Interest Paid Net InterestPaidNet	4872000	USD
	us-gaap	Interest Paid Net InterestPaidNet	5528000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2785000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1756000	USD
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	639000	USD
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	696000	USD
	nksh	Loans Transferred To Repossessed Assets LoansTransferredToRepossessedAssets	4000	USD
	nksh	Loans Transferred To Repossessed Assets LoansTransferredToRepossessedAssets	15000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	14794000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	10056000	USD
	nksh	Noncash Increase To Operating Lease Rightofuse Asset NoncashIncreaseToOperatingLeaseRightofuseAsset	23000	USD
	nksh	Noncash Increase To Operating Lease Rightofuse Asset NoncashIncreaseToOperatingLeaseRightofuseAsset	1837000	USD
	nksh	Noncash Increase To Operating Lease Liability NoncashIncreaseToOperatingLeaseLiability	23000	USD
	nksh	Noncash Increase To Operating Lease Liability NoncashIncreaseToOperatingLeaseLiability	1837000	USD
CY2020Q3	nksh	Number Of Loan Modifications For Covid19 Related Accommodations NumberOfLoanModificationsForCOVID19RelatedAccommodations	361	pure
CY2020Q3	nksh	Principal Balance Of Loans With Covid19 Related Accommodations PrincipalBalanceOfLoansWithCOVID19RelatedAccommodations	160230000	USD
CY2020Q3	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	802799000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	734027000	USD
CY2020Q3	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	2145000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Deferred Income LoansAndLeasesReceivableDeferredIncome	576000	USD
CY2020Q3	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	800654000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	733451000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	6863000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	639000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	219000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1985000	USD
CY2020Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	8428000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	7390000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	696000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	218000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	350000	USD
CY2019Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	7262000	USD
CY2018Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	7390000	USD
CY2019	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	920000	USD
CY2019	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	267000	USD
CY2019	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	126000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	6863000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	104000	USD
CY2020Q3	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	8324000	USD
CY2020Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	8428000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	110000	USD
CY2019Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	6753000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	6863000	USD
	nksh	Ratio Of Allowance For Loan Losses To End Of Period Loans RatioOfAllowanceForLoanLossesToEndOfPeriodLoans	0.0105	pure
CY2020Q3	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	4995000	USD
CY2020Q3	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	797804000	USD
CY2020Q3	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	802799000	USD
CY2019Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	5289000	USD
CY2019Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	728738000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	734027000	USD
	nksh	Ratio Of Allowance For Loan Losses To End Of Period Loans RatioOfAllowanceForLoanLossesToEndOfPeriodLoans	0.0101	pure
CY2019	nksh	Ratio Of Allowance For Loan Losses To End Of Period Loans RatioOfAllowanceForLoanLossesToEndOfPeriodLoans	0.0094	pure
	nksh	Ratio Of Net Chargeoffs To Average Loans RatioOfNetChargeoffsToAverageLoans	0.0007	pure
	nksh	Ratio Of Net Chargeoffs To Average Loans RatioOfNetChargeoffsToAverageLoans	0.0009	pure
CY2019	nksh	Ratio Of Net Chargeoffs To Average Loans RatioOfNetChargeoffsToAverageLoans	0.0009	pure
	nksh	Ratio Of Allowance For Loan Losses To End Of Period Loans Excluding Ppp Loans RatioOfAllowanceForLoanLossesToEndOfPeriodLoansExcludingPPPLoans	0.0113	pure
CY2020Q3	nksh	Loan Receivable Nonaccrual LoanReceivableNonaccrual	736000	USD
CY2019Q3	nksh	Loan Receivable Nonaccrual LoanReceivableNonaccrual	699000	USD
CY2019Q4	nksh	Loan Receivable Nonaccrual LoanReceivableNonaccrual	164000	USD
CY2020Q3	nksh	Nonaccrual Restructured Loans NonaccrualRestructuredLoans	2866000	USD
CY2019Q3	nksh	Nonaccrual Restructured Loans NonaccrualRestructuredLoans	3377000	USD
CY2019Q4	nksh	Nonaccrual Restructured Loans NonaccrualRestructuredLoans	3211000	USD
CY2020Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	3602000	USD
CY2019Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	4076000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	3375000	USD
CY2020Q3	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	1553000	USD
CY2019Q3	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	1470000	USD
CY2019Q4	us-gaap	Real Estate Acquired Through Foreclosure RealEstateAcquiredThroughForeclosure	1612000	USD
CY2020Q3	nksh	Nonperforming Assets NonperformingAssets	5155000	USD
CY2019Q3	nksh	Nonperforming Assets NonperformingAssets	5546000	USD
CY2019Q4	nksh	Nonperforming Assets NonperformingAssets	4987000	USD
CY2020Q3	nksh	Assets Ratio Of Nonperforming Assets To Loans Net Of Unearned Income And Deferred Fees Plus Oreo AssetsRatioOfNonperformingAssetsToLoansNetOfUnearnedIncomeAndDeferredFeesPlusOreo	0.0064	pure
CY2019Q3	nksh	Assets Ratio Of Nonperforming Assets To Loans Net Of Unearned Income And Deferred Fees Plus Oreo AssetsRatioOfNonperformingAssetsToLoansNetOfUnearnedIncomeAndDeferredFeesPlusOreo	0.0077	pure
CY2019Q4	nksh	Assets Ratio Of Nonperforming Assets To Loans Net Of Unearned Income And Deferred Fees Plus Oreo AssetsRatioOfNonperformingAssetsToLoansNetOfUnearnedIncomeAndDeferredFeesPlusOreo	0.0068	pure
CY2020Q3	nksh	Ratio Of Allowance For Loan Losses To Nonperforming Loans RatioOfAllowanceForLoanLossesToNonperformingLoans	2.3398	pure
CY2019Q3	nksh	Ratio Of Allowance For Loan Losses To Nonperforming Loans RatioOfAllowanceForLoanLossesToNonperformingLoans	1.7816	pure
CY2019Q4	nksh	Ratio Of Allowance For Loan Losses To Nonperforming Loans RatioOfAllowanceForLoanLossesToNonperformingLoans	2.0335	pure
CY2020Q3	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	236000	USD
CY2019Q3	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	212000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	231000	USD
CY2020Q3	nksh	Ratio Of Loans Past Due90 Days Or More And Still Accruing To Loans RatioOfLoansPastDue90DaysOrMoreAndStillAccruingToLoans	0.0003	pure
CY2019Q3	nksh	Ratio Of Loans Past Due90 Days Or More And Still Accruing To Loans RatioOfLoansPastDue90DaysOrMoreAndStillAccruingToLoans	0.0003	pure
CY2019Q4	nksh	Ratio Of Loans Past Due90 Days Or More And Still Accruing To Loans RatioOfLoansPastDue90DaysOrMoreAndStillAccruingToLoans	0.0003	pure
CY2020Q3	nksh	Accruing Restructured Loans AccruingRestructuredLoans	1426000	USD
CY2019Q3	nksh	Accruing Restructured Loans AccruingRestructuredLoans	1880000	USD
CY2019Q4	nksh	Accruing Restructured Loans AccruingRestructuredLoans	1729000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	3939000	USD
CY2019Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	5163000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	4174000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	1056000	USD
CY2019Q3	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	1070000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	1115000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	5227000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	49000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	6729000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	144000	USD
CY2019	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	5359000	USD
CY2019	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	171000	USD
CY2020Q3	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	236000	USD
CY2020Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	3602000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	4995000	USD
CY2019Q3	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	6233000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	5289000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	104000	USD
CY2019Q3	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	120000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	110000	USD
CY2020Q3	nksh	Impaired Loans Net Of Allowance ImpairedLoansNetOfAllowance	4891000	USD
CY2019Q3	nksh	Impaired Loans Net Of Allowance ImpairedLoansNetOfAllowance	6113000	USD
CY2019Q4	nksh	Impaired Loans Net Of Allowance ImpairedLoansNetOfAllowance	5179000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	5227000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	6729000	USD
CY2019	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	5359000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	49000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	144000	USD
CY2019	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	171000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	5522000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	4995000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	3939000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	1056000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	104000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	5757000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	5289000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	4174000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	1115000	USD
CY2019Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	110000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	231000	USD
CY2019Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	3375000	USD
	nksh	Threshold Period For Considering Loans As Special Mention Or Classified ThresholdPeriodForConsideringLoansAsSpecialMentionOrClassified	P75D
CY2020Q3	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	4292000	USD
CY2019Q4	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	4940000	USD
CY2019Q3	us-gaap	Financing Receivable Modifications Recorded Investment FinancingReceivableModificationsRecordedInvestment	5257000	USD
	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	1	pure
	us-gaap	Financing Receivable Modifications Pre Modification Recorded Investment2 FinancingReceivableModificationsPreModificationRecordedInvestment2	98000	USD
	us-gaap	Financing Receivable Modifications Post Modification Recorded Investment2 FinancingReceivableModificationsPostModificationRecordedInvestment2	98000	USD
CY2020Q3	nksh	Number Of Loan Modifications For Covid19 Related Accommodations NumberOfLoanModificationsForCOVID19RelatedAccommodations	361	pure
CY2020Q3	nksh	Principal Balance Of Loans With Covid19 Related Accommodations PrincipalBalanceOfLoansWithCOVID19RelatedAccommodations	160230000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	472460000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	15330000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	439000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	487351000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	435166000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	2951000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	2854000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	435263000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	8732000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	8806000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	4837000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	5010000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	130312000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	135038000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	328579000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	338497000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	472460000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	487351000	USD
CY2020Q3	nksh	Continuous Unrealized Loss Position Less Than Twelve Months Fair Value ContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	49277000	USD
CY2020Q3	nksh	Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses ContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses	423000	USD
CY2020Q3	nksh	Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value ContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	5637000	USD
CY2020Q3	nksh	Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses ContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses	16000	USD
CY2019Q4	nksh	Continuous Unrealized Loss Position Less Than Twelve Months Fair Value ContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	270457000	USD
CY2019Q4	nksh	Continuous Unrealized Loss Position Less Than12 Months Aggregate Losses ContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses	2769000	USD
CY2019Q4	nksh	Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value ContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	39553000	USD
CY2019Q4	nksh	Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses ContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses	85000	USD
CY2020Q3	nksh	Number Of Temporarily Impaired Securities NumberOfTemporarilyImpairedSecurities	37	pure
CY2020Q3	nksh	Available For Sale And Held To Maturity Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleAndHeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	54914000	USD
CY2020Q3	nksh	Continuous Unrealized Loss Position Aggregate Losses ContinuousUnrealizedLossPositionAggregateLosses	439000	USD
CY2020Q3	nksh	Number Of Temporarily Impaired Securities Greater Than Twelve Months NumberOfTemporarilyImpairedSecuritiesGreaterThanTwelveMonths	2	pure
CY2020Q3	nksh	Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value ContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	5637000	USD
CY2020Q3	nksh	Continuous Unrealized Loss Position12 Months Or Longer Aggregate Losses ContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses	16000	USD
	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	810000	USD
	us-gaap	Defined Benefit Plan Service Cost DefinedBenefitPlanServiceCost	600000	USD
	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	615000	USD
	us-gaap	Defined Benefit Plan Interest Cost DefinedBenefitPlanInterestCost	663000	USD
	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	1260000	USD
	us-gaap	Defined Benefit Plan Expected Return On Plan Assets DefinedBenefitPlanExpectedReturnOnPlanAssets	1095000	USD
	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	81000	USD
	us-gaap	Other Comprehensive Income Loss Amortization Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Prior Service Cost Credit Net Of Tax OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax	81000	USD
	nksh	Revenue From Contract With Customer Including Assessed Tax Outside Of Topic606 RevenueFromContractWithCustomerIncludingAssessedTaxOutsideOfTopic606	1656000	USD
	nksh	Revenue From Contract With Customer Including Assessed Tax Outside Of Topic606 RevenueFromContractWithCustomerIncludingAssessedTaxOutsideOfTopic606	1871000	USD
	us-gaap	Noninterest Income NoninterestIncome	5806000	USD
	us-gaap	Noninterest Income NoninterestIncome	6443000	USD
	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-531000	USD
	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-474000	USD
	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	615000	USD
	us-gaap	Defined Benefit Plan Net Periodic Benefit Cost DefinedBenefitPlanNetPeriodicBenefitCost	561000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	487351000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	435263000	USD
CY2020Q3	nksh	Impaired Loans Net Fair Value Disclosure ImpairedLoansNetFairValueDisclosure	952000	USD
CY2019Q4	nksh	Impaired Loans Net Fair Value Disclosure ImpairedLoansNetFairValueDisclosure	1005000	USD
CY2020Q3	nksh	Other Real Estate Fair Value Disclosure OtherRealEstateFairValueDisclosure	1553000	USD
CY2019Q4	nksh	Other Real Estate Fair Value Disclosure OtherRealEstateFairValueDisclosure	1612000	USD
CY2020Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	1413000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	1576000	USD
CY2020Q3	nksh	Revenue From Contract With Customer Including Assessed Tax Outside Of Topic606 RevenueFromContractWithCustomerIncludingAssessedTaxOutsideOfTopic606	513000	USD
CY2019Q3	nksh	Revenue From Contract With Customer Including Assessed Tax Outside Of Topic606 RevenueFromContractWithCustomerIncludingAssessedTaxOutsideOfTopic606	522000	USD
CY2020Q3	us-gaap	Noninterest Income NoninterestIncome	1926000	USD
CY2019Q3	us-gaap	Noninterest Income NoninterestIncome	2098000	USD
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	4150000	USD
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	4572000	USD
CY2020Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	2074000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	2277000	USD
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y10M24D
CY2020Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0304	pure
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0302	pure
CY2020Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	92000	USD
CY2019Q3	us-gaap	Operating Lease Cost OperatingLeaseCost	82000	USD
CY2020Q3	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1000	USD
CY2019Q3	us-gaap	Short Term Lease Cost ShortTermLeaseCost	29000	USD
CY2020Q3	us-gaap	Lease Cost LeaseCost	93000	USD
CY2019Q3	us-gaap	Lease Cost LeaseCost	111000	USD
CY2020Q3	us-gaap	Operating Lease Payments OperatingLeasePayments	90000	USD
CY2019Q3	us-gaap	Operating Lease Payments OperatingLeasePayments	79000	USD
CY2020Q3	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	23000	USD
CY2019Q3	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	284000	USD
	us-gaap	Operating Lease Cost OperatingLeaseCost	277000	USD
	us-gaap	Operating Lease Cost OperatingLeaseCost	218000	USD
	us-gaap	Short Term Lease Cost ShortTermLeaseCost	2000	USD
	us-gaap	Short Term Lease Cost ShortTermLeaseCost	101000	USD
	us-gaap	Lease Cost LeaseCost	279000	USD
	us-gaap	Lease Cost LeaseCost	319000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	272000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	211000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	23000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	1837000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	90000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	363000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	352000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	352000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	334000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	244000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	608000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	2343000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	253000	USD

Files In Submission

Name	View Source	Status
0001437749-20-022905-index-headers.html	Edgar Link	pending
0001437749-20-022905-index.html	Edgar Link	pending
0001437749-20-022905.txt	Edgar Link	pending
0001437749-20-022905-xbrl.zip	Edgar Link	pending
ex_209821.htm	Edgar Link	pending
ex_209822.htm	Edgar Link	pending
ex_209823.htm	Edgar Link	pending
ex_209824.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
nksh-20200930.xsd	Edgar Link	pending
nksh-20200930_cal.xml	Edgar Link	unprocessable
nksh-20200930_def.xml	Edgar Link	unprocessable
nksh-20200930_lab.xml	Edgar Link	unprocessable
nksh-20200930_pre.xml	Edgar Link	unprocessable
nksh20200930_10q.htm	Edgar Link	pending
nksh20200930_10q_htm.xml	Edgar Link	completed
R1.htm	Edgar Link	pending
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R6.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$NKSH
NATIONAL BANKSHARES INC Stock $nksh

2020 Q4 Form 10-Q Financial Statement

#000143774920022905 Filed on November 06, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NKSH NATIONAL BANKSHARES INC Stock $nksh

2020 Q4 Form 10-Q Financial Statement

#000143774920022905 Filed on November 06, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NKSH
NATIONAL BANKSHARES INC Stock $nksh