$NHC
NATIONAL HEALTHCARE CORP Stock $nhc

$nhc Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-Q Financial Statement

#000143774921025293 Filed on November 04, 2021

Income Statement

Concept	2021 Q4	2021 Q3	2020 Q3
Revenue	$283.4M	$276.7M	$250.6M
YoY Change	9.09%	10.42%	1.44%
Cost Of Revenue	$157.4M	$159.3M	$149.1M
YoY Change	6.83%	6.87%	-2.05%
Gross Profit	$126.0M	$117.4M	$101.6M
YoY Change	12.04%	15.62%	7.04%
Gross Profit Margin	44.46%	42.43%	40.53%
Selling, General & Admin	$10.38M	$10.20M	$10.32M
YoY Change	9.02%	-1.12%	1.5%
% of Gross Profit	8.24%	8.69%	10.16%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$10.15M	$10.23M	$10.55M
YoY Change	-3.2%	-3.02%	-1.08%
% of Gross Profit	8.06%	8.71%	10.39%
Operating Expenses	$86.90M	$104.5M	$83.34M
YoY Change	14.28%	25.36%	-4.82%
Operating Profit	$39.11M	$12.76M	$7.022M
YoY Change	7.36%	81.74%	6.91%
Interest Expense	$11.71M	$198.0K	$285.0K
YoY Change	-51.27%	-30.53%	-62.7%
% of Operating Profit	29.93%	1.55%	4.06%
Other Income/Expense, Net		$3.399M	$6.478M
YoY Change		-47.53%	-2.78%
Pretax Income	$21.04M	-$7.636M	$13.26M
YoY Change	-43.21%	-157.59%	-41.18%
Income Tax	$5.044M	-$4.090M	$391.0K
% Of Pretax Income	23.97%		2.95%
Net Earnings	$15.79M	-$3.348M	$12.85M
YoY Change	-42.69%	-126.06%	-33.98%
Net Earnings / Revenue	5.57%	-1.21%	5.13%
Basic Earnings Per Share		-$0.22	$0.84
Diluted Earnings Per Share	$1.024M	-$0.22	$0.84
COMMON SHARES
Basic Shares Outstanding	15.42M	15.36M	15.31M
Diluted Shares Outstanding		15.36M	15.37M

Balance Sheet

Concept	2021 Q4	2021 Q3	2020 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$419.8M	$417.0M	$203.0M
YoY Change	-10.72%	105.4%	152.24%
Cash & Equivalents	$107.6M	$112.5M	$183.8M
Short-Term Investments	$312.2M	$304.5M	$19.25M
Other Short-Term Assets	$65.45M	$61.27M	$33.55M
YoY Change	92.9%	82.6%	4.82%
Inventory	$8.582M	$8.696M	$7.188M
Prepaid Expenses
Receivables	$96.12M	$99.02M	$84.60M
Other Receivables	$453.0K	$899.0K	$1.253M
Total Short-Term Assets	$426.6M	$424.8M	$422.2M
YoY Change	-6.59%	0.62%	20.23%
LONG-TERM ASSETS
Property, Plant & Equipment	$521.0M	$522.0M	$530.6M
YoY Change	0.13%	-1.62%	-1.67%
Goodwill	$168.3M	$168.3M	$21.34M
YoY Change	0.0%	688.6%	1.65%
Intangibles	$7.038M	$7.038M
YoY Change
Long-Term Investments	$2.022M	$2.231M	$36.89M
YoY Change	-95.04%	-93.95%	-0.27%
Other Assets	$455.8M	$469.0M	$385.9M
YoY Change	18.36%	21.51%	-7.32%
Total Long-Term Assets	$976.8M	$991.0M	$916.6M
YoY Change	7.88%	8.12%	-4.13%
TOTAL ASSETS
Total Short-Term Assets	$426.6M	$424.8M	$422.2M
Total Long-Term Assets	$976.8M	$991.0M	$916.6M
Total Assets	$1.403B	$1.416B	$1.339B
YoY Change	3.03%	5.75%	2.41%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$22.49M	$32.90M	$19.89M
YoY Change	6.52%	65.41%	6.4%
Accrued Expenses	$165.4M	$144.5M	$115.7M
YoY Change	16.0%	24.9%	3.48%
Deferred Revenue	$15.02M	$27.01M	$51.25M
YoY Change	-70.69%	-47.29%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$4.695M	$4.626M	$0.00
YoY Change
Total Short-Term Liabilities	$263.2M	$257.7M	$259.7M
YoY Change	-6.41%	-0.77%	43.4%
LONG-TERM LIABILITIES
Long-Term Debt	$5.845M	$7.045M	$0.00
YoY Change	-44.54%		-100.0%
Other Long-Term Liabilities	$16.57M	$26.50M	$32.67M
YoY Change	-41.6%	-18.89%	137.37%
Total Long-Term Liabilities	$16.57M	$26.50M	$32.67M
YoY Change	-41.6%	-18.89%	-25.34%
TOTAL LIABILITIES
Total Short-Term Liabilities	$263.2M	$257.7M	$259.7M
Total Long-Term Liabilities	$16.57M	$26.50M	$32.67M
Total Liabilities	$494.9M	$513.9M	$561.6M
YoY Change	-12.23%	-8.49%	4.93%
SHAREHOLDERS EQUITY
Retained Earnings	$669.1M	$661.8M	$543.5M
YoY Change	18.84%	21.77%	-0.7%
Common Stock	$154.0K	$154.0K	$153.0K
YoY Change	0.65%	0.65%	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$903.0M	$895.7M	$774.0M
YoY Change
Total Liabilities & Shareholders Equity	$1.403B	$1.416B	$1.339B
YoY Change	3.03%	5.75%	2.41%

Cashflow Statement

Concept	2021 Q4	2021 Q3	2020 Q3
OPERATING ACTIVITIES
Net Income	$15.79M	-$3.348M	$12.85M
YoY Change	-42.69%	-126.06%	-33.98%
Depreciation, Depletion And Amortization	$10.15M	$10.23M	$10.55M
YoY Change	-3.2%	-3.02%	-1.08%
Cash From Operating Activities	$15.52M	$6.749M	$29.17M
YoY Change	-19.82%	-76.87%	-18.31%
INVESTING ACTIVITIES
Capital Expenditures	-$13.63M	-$12.63M	-$5.200M
YoY Change	227.84%	142.9%	-8.47%
Acquisitions
YoY Change
Other Investing Activities	$573.0K	-$8.211M	$8.494M
YoY Change	-101.29%	-196.67%	17.52%
Cash From Investing Activities	-$13.05M	-$20.84M	$3.294M
YoY Change	-73.15%	-732.73%	112.93%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-9.495M	-9.727M	-7.128M
YoY Change	13.44%	36.46%	-79.68%
NET CHANGE
Cash From Operating Activities	15.52M	6.749M	29.17M
Cash From Investing Activities	-13.05M	-20.84M	3.294M
Cash From Financing Activities	-9.495M	-9.727M	-7.128M
Net Change In Cash	-7.024M	-23.82M	25.34M
YoY Change	-81.33%	-194.01%	1064.48%
FREE CASH FLOW
Cash From Operating Activities	$15.52M	$6.749M	$29.17M
Capital Expenditures	-$13.63M	-$12.63M	-$5.200M
Free Cash Flow	$29.15M	$19.38M	$34.37M
YoY Change	23.95%	-43.62%	-16.96%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	15423340
CY2021Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2021Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	45000000
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	45000000
CY2021Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	15423240
CY2021Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	15423240
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	15369745
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	15369745
CY2021Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.52
CY2021Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.52
CY2021Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.52
CY2020Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.52
CY2020Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.52
CY2020Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.52
CY2021Q3	nhc	Number Of Independent Living Facilities NumberOfIndependentLivingFacilities	5	pure
CY2021Q3	nhc	Number Of Geriatric Psychiatric Hospitals NumberOfGeriatricPsychiatricHospitals	1	pure
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	pure
CY2020Q4	us-gaap	Continuing Care Retirement Communities Advance Fees Obligation For Future Services Amount ContinuingCareRetirementCommunitiesAdvanceFeesObligationForFutureServicesAmount	2177000	USD
CY2021Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	14000	USD
	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	pure
CY2021Q3	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0	USD
CY2020Q3	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0	USD
	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0	USD
	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0	USD
	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y
CY2021Q3	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	768851
	nhc	Effective Income Tax Rate Reconciliation Benefit Resulting From Expiration Of Applicable Statute Limitations Amount EffectiveIncomeTaxRateReconciliationBenefitResultingFromExpirationOfApplicableStatuteLimitationsAmount	1444000	USD
	nhc	Effective Income Tax Rate Reconciliation Benefit Resulting From Expiration Of Applicable Statute Limitations Amount EffectiveIncomeTaxRateReconciliationBenefitResultingFromExpirationOfApplicableStatuteLimitationsAmount	2234000	USD
CY2021Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	254817000	USD
CY2020Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	227383000	USD
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	708648000	USD
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	697149000	USD
CY2021Q3	nhc	Other Revenues OtherRevenues	11491000	USD
CY2020Q3	nhc	Other Revenues OtherRevenues	11111000	USD
	nhc	Other Revenues OtherRevenues	33916000	USD
	nhc	Other Revenues OtherRevenues	34463000	USD
CY2021Q3	nhc	Government Assistance Stimulus Income Cares Act GovernmentAssistanceStimulusIncomeCaresAct	10429000	USD
CY2020Q3	nhc	Government Assistance Stimulus Income Cares Act GovernmentAssistanceStimulusIncomeCaresAct	12132000	USD
	nhc	Government Assistance Stimulus Income Cares Act GovernmentAssistanceStimulusIncomeCaresAct	48304000	USD
	nhc	Government Assistance Stimulus Income Cares Act GovernmentAssistanceStimulusIncomeCaresAct	36780000	USD
CY2021Q3	us-gaap	Revenues Revenues	276737000	USD
CY2020Q3	us-gaap	Revenues Revenues	250626000	USD
	us-gaap	Revenues Revenues	790868000	USD
	us-gaap	Revenues Revenues	768392000	USD
CY2021Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	159305000	USD
CY2020Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	151564000	USD
CY2021Q3	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	84039000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	461239000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	455947000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	128999000	USD
CY2020Q3	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-241000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-23227000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	15374000	USD
CY2021Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-4090000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	391000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5907000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	800000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-40580000	USD
CY2021Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-7636000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	13259000	USD
CY2020Q3	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	70887000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	226235000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	213416000	USD
CY2021Q3	us-gaap	Operating Lease Expense OperatingLeaseExpense	10204000	USD
CY2020Q3	us-gaap	Operating Lease Expense OperatingLeaseExpense	10320000	USD
	us-gaap	Operating Lease Expense OperatingLeaseExpense	30437000	USD
	us-gaap	Operating Lease Expense OperatingLeaseExpense	30972000	USD
CY2021Q3	us-gaap	Depreciation And Amortization DepreciationAndAmortization	10229000	USD
CY2020Q3	us-gaap	Depreciation And Amortization DepreciationAndAmortization	10548000	USD
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	30521000	USD
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	31531000	USD
CY2021Q3	us-gaap	Interest Expense InterestExpense	198000	USD
CY2020Q3	us-gaap	Interest Expense InterestExpense	285000	USD
	us-gaap	Interest Expense InterestExpense	657000	USD
	us-gaap	Interest Expense InterestExpense	1150000	USD
CY2021Q3	us-gaap	Costs And Expenses CostsAndExpenses	263975000	USD
CY2020Q3	us-gaap	Costs And Expenses CostsAndExpenses	243604000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	749089000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	733016000	USD
CY2021Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	12762000	USD
CY2020Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	7022000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	41779000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	35376000	USD
CY2021Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	3399000	USD
CY2020Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	6478000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	15245000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	18870000	USD
CY2021Q3	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain	0	USD
CY2020Q3	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain	0	USD
	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain	95202000	USD
	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain	1708000	USD
CY2021Q3	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-23797000	USD
CY2021Q3	us-gaap	Profit Loss ProfitLoss	-3546000	USD
CY2020Q3	us-gaap	Profit Loss ProfitLoss	12868000	USD
	us-gaap	Profit Loss ProfitLoss	123092000	USD
	us-gaap	Profit Loss ProfitLoss	14574000	USD
CY2021Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-198000	USD
CY2020Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	19000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	290000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	253000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	-3348000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	12849000	USD
	us-gaap	Net Income Loss NetIncomeLoss	122802000	USD
	us-gaap	Profit Loss ProfitLoss	14574000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-658000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	632000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-2691000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	2883000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	2000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	122000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	214000	USD
	us-gaap	Net Income Loss NetIncomeLoss	14321000	USD
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.22
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.84
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	8.00
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.94
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.22
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	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	7.97
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.93
CY2021Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15364043
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15310754
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15347042
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15304235
CY2021Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	15364043
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	15371311
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	15414683
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	15368775
CY2021Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.52
CY2020Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.52
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.56
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.56
CY2021Q3	us-gaap	Profit Loss ProfitLoss	-3546000	USD
CY2020Q3	us-gaap	Profit Loss ProfitLoss	12868000	USD
	us-gaap	Profit Loss ProfitLoss	123092000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	135000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-138000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	107000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-614000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	577000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-522000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	403000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-2291000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2171000	USD
CY2021Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-198000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	19000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	290000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	253000	USD
CY2021Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-3870000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	13252000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	120511000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	16492000	USD
CY2021Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	112462000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	147093000	USD
CY2021Q3	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	12506000	USD
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	9673000	USD
CY2021Q3	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	105893000	USD
CY2020Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	128590000	USD
CY2021Q3	us-gaap	Debt Securities Current DebtSecuritiesCurrent	36590000	USD
CY2020Q4	us-gaap	Debt Securities Current DebtSecuritiesCurrent	47762000	USD
CY2021Q3	us-gaap	Equity Securities Fv Ni Restricted EquitySecuritiesFvNiRestricted	24520000	USD
CY2020Q4	us-gaap	Equity Securities Fv Ni Restricted EquitySecuritiesFvNiRestricted	4680000	USD
CY2021Q3	nhc	Restricted Marketable Debt Securities Current RestrictedMarketableDebtSecuritiesCurrent	18794000	USD
CY2020Q4	nhc	Restricted Marketable Debt Securities Current RestrictedMarketableDebtSecuritiesCurrent	16601000	USD
CY2021Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	99019000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	89670000	USD
CY2021Q3	us-gaap	Inventory Net InventoryNet	8696000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	8781000	USD
CY2021Q3	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	5450000	USD
CY2020Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	2977000	USD
CY2021Q3	us-gaap	Notes And Loans Receivable Net Current NotesAndLoansReceivableNetCurrent	899000	USD
CY2020Q4	us-gaap	Notes And Loans Receivable Net Current NotesAndLoansReceivableNetCurrent	928000	USD
CY2021Q3	us-gaap	Assets Current AssetsCurrent	424829000	USD
CY2020Q4	us-gaap	Assets Current AssetsCurrent	456755000	USD
CY2021Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1062620000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1030426000	USD
CY2021Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	540601000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	510108000	USD
CY2021Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	522019000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	520318000	USD
CY2021Q3	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	1799000	USD
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	1736000	USD
CY2021Q3	nhc	Restricted Marketable Debt Securities Noncurrent RestrictedMarketableDebtSecuritiesNoncurrent	118737000	USD
CY2020Q4	nhc	Restricted Marketable Debt Securities Noncurrent RestrictedMarketableDebtSecuritiesNoncurrent	125472000	USD
CY2021Q3	us-gaap	Deposits Assets Noncurrent DepositsAssetsNoncurrent	4798000	USD
CY2020Q4	us-gaap	Deposits Assets Noncurrent DepositsAssetsNoncurrent	4580000	USD
CY2021Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	162550000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	179055000	USD
CY2021Q3	us-gaap	Goodwill Goodwill	168295000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	21341000	USD
CY2021Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	7038000	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	0	USD
CY2021Q3	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	3502000	USD
CY2020Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	12093000	USD
CY2021Q3	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	2231000	USD
CY2020Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	40782000	USD
CY2021Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	468950000	USD
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	385059000	USD
CY2021Q3	us-gaap	Assets Assets	1415798000	USD
CY2020Q4	us-gaap	Assets Assets	1362132000	USD
CY2021Q3	us-gaap	Accounts Payable Trade Current AccountsPayableTradeCurrent	32900000	USD
CY2020Q4	us-gaap	Accounts Payable Trade Current AccountsPayableTradeCurrent	21112000	USD
CY2021Q3	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	4626000	USD
CY2020Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	4423000	USD
CY2021Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	27289000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	25451000	USD
CY2021Q3	us-gaap	Accrued Salaries Current AccruedSalariesCurrent	85926000	USD
CY2020Q4	us-gaap	Accrued Salaries Current AccruedSalariesCurrent	86183000	USD
CY2021Q3	us-gaap	Accounts Payable Other Current AccountsPayableOtherCurrent	17046000	USD
CY2020Q4	us-gaap	Accounts Payable Other Current AccountsPayableOtherCurrent	16454000	USD
CY2021Q3	us-gaap	Self Insurance Reserve Current SelfInsuranceReserveCurrent	31300000	USD
CY2020Q4	us-gaap	Self Insurance Reserve Current SelfInsuranceReserveCurrent	30953000	USD
CY2021Q3	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	23550000	USD
	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	10404000	USD
CY2020Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	21344000	USD
CY2021Q3	nhc	Provider Relief Funds ProviderReliefFunds	0	USD
CY2020Q4	nhc	Provider Relief Funds ProviderReliefFunds	16068000	USD
CY2021Q3	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	27013000	USD
CY2020Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	51253000	USD
CY2021Q3	us-gaap	Dividends Payable Current DividendsPayableCurrent	8020000	USD
CY2020Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	7987000	USD
CY2021Q3	us-gaap	Liabilities Current LiabilitiesCurrent	257670000	USD
CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	281228000	USD
CY2021Q3	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	7045000	USD
CY2020Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	10540000	USD
CY2021Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	135261000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	153604000	USD
CY2021Q3	us-gaap	Self Insurance Reserve Noncurrent SelfInsuranceReserveNoncurrent	72524000	USD
CY2020Q4	us-gaap	Self Insurance Reserve Noncurrent SelfInsuranceReserveNoncurrent	68584000	USD
CY2021Q3	us-gaap	Contract With Customer Refund Liability Noncurrent ContractWithCustomerRefundLiabilityNoncurrent	6868000	USD
CY2020Q4	us-gaap	Contract With Customer Refund Liability Noncurrent ContractWithCustomerRefundLiabilityNoncurrent	7462000	USD
CY2021Q3	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	8037000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	14079000	USD
CY2021Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	26503000	USD
CY2020Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	28375000	USD
CY2021Q3	us-gaap	Liabilities Liabilities	513908000	USD
CY2020Q4	us-gaap	Liabilities Liabilities	563872000	USD
CY2021Q3	us-gaap	Common Stock Value CommonStockValue	154000	USD
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	153000	USD
CY2021Q3	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	230974000	USD
CY2020Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	226943000	USD
CY2021Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	661783000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	563024000	USD
CY2021Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	2766000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	5057000	USD
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	895677000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	795177000	USD
CY2021Q3	us-gaap	Minority Interest MinorityInterest	6213000	USD
CY2020Q4	us-gaap	Minority Interest MinorityInterest	3083000	USD
CY2021Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	901890000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	798260000	USD
CY2021Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1415798000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1362132000	USD
	us-gaap	Profit Loss ProfitLoss	123092000	USD
	us-gaap	Profit Loss ProfitLoss	14574000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	30521000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	31531000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	5320000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	8448000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	6314000	USD
	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	10050000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-23227000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-40580000	USD
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	941000	USD
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	135000	USD
	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain	95202000	USD
	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain	1708000	USD
	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	5428000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-9604000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	1905000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	1807000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-1195000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-85000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-344000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	1685000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-2992000	USD
	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	8329000	USD
	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	207000	USD
	us-gaap	Increase Decrease In Accrued Salaries IncreaseDecreaseInAccruedSalaries	-3480000	USD
	us-gaap	Increase Decrease In Accrued Salaries IncreaseDecreaseInAccruedSalaries	5309000	USD
	nhc	Increase Decrease In Due To Third Party Payors IncreaseDecreaseInDueToThirdPartyPayors	100000	USD
	nhc	Increase Decrease In Due To Third Party Payors IncreaseDecreaseInDueToThirdPartyPayors	388000	USD
	us-gaap	Increase Decrease In Self Insurance Reserve IncreaseDecreaseInSelfInsuranceReserve	4287000	USD
	us-gaap	Increase Decrease In Self Insurance Reserve IncreaseDecreaseInSelfInsuranceReserve	9977000	USD
	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-16068000	USD
	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	21404000	USD
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-24240000	USD
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	51253000	USD
	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	2110000	USD
	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	7985000	USD
	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-1930000	USD
	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-3410000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	46871000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	183900000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	25774000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	17717000	USD
	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	28713000	USD
	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	6648000	USD
	nhc	Payments For Proceeds From Unconsolidated Investments PaymentsForProceedsFromUnconsolidatedInvestments	350000	USD
	nhc	Payments For Proceeds From Unconsolidated Investments PaymentsForProceedsFromUnconsolidatedInvestments	305000	USD
	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	-0	USD
	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	425000	USD
	us-gaap	Proceeds From Collection Of Notes Receivable ProceedsFromCollectionOfNotesReceivable	8620000	USD
	us-gaap	Proceeds From Collection Of Notes Receivable ProceedsFromCollectionOfNotesReceivable	1572000	USD
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	95749000	USD
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	19754000	USD
	us-gaap	Proceeds From Sale Of Restricted Investments ProceedsFromSaleOfRestrictedInvestments	89129000	USD
	us-gaap	Proceeds From Sale Of Restricted Investments ProceedsFromSaleOfRestrictedInvestments	28004000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-52837000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-15273000	USD
	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	0	USD
	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	40000000	USD
	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	-0	USD
	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	50000000	USD
	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	3292000	USD
	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	3101000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	24010000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	23935000	USD
	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	0	USD
	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	2488000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	2405000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1075000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	278000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	53000	USD
	nhc	Entrance Fee Deposits Refunds EntranceFeeDepositsRefunds	-594000	USD
	nhc	Entrance Fee Deposits Refunds EntranceFeeDepositsRefunds	7000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-25769000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-33519000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-31735000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	135108000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	158502000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	61010000	USD
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	126767000	USD
CY2020Q1	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	400000	USD
CY2020Q1	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	53000	USD
CY2020Q1	us-gaap	Dividends Common Stock DividendsCommonStock	7980000	USD
CY2020Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	743355000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	196118000	USD
CY2021Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	112462000	USD
CY2020Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	183765000	USD
CY2021Q3	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	14305000	USD
CY2020Q3	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	12353000	USD
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	126767000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	196118000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	798260000	USD
CY2021Q1	us-gaap	Profit Loss ProfitLoss	21308000	USD
CY2021Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1922000	USD
CY2021Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	496000	USD
CY2021Q1	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	327000	USD
CY2021Q1	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	278000	USD
CY2021Q1	us-gaap	Dividends Common Stock DividendsCommonStock	8003000	USD
CY2021Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	810188000	USD
CY2021Q2	us-gaap	Profit Loss ProfitLoss	105330000	USD
CY2021Q2	nhc	Noncontrolling Interest Increase From Capital Contribution NoncontrollingInterestIncreaseFromCapitalContribution	2840000	USD
CY2021Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	153000	USD
CY2021Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	683000	USD
CY2021Q2	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	2078000	USD
CY2021Q2	us-gaap	Dividends Common Stock DividendsCommonStock	8020000	USD
CY2021Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	913252000	USD
CY2021Q3	us-gaap	Profit Loss ProfitLoss	-3546000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-522000	USD
CY2021Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	726000	USD
CY2021Q3	us-gaap	Dividends Common Stock DividendsCommonStock	8020000	USD
CY2021Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	901890000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	779069000	USD
CY2020Q1	us-gaap	Profit Loss ProfitLoss	-26816000	USD
CY2020Q1	nhc	Noncontrolling Interest Increase From Capital Contribution NoncontrollingInterestIncreaseFromCapitalContribution	281000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-2012000	USD
CY2020Q1	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	466000	USD
CY2020Q2	us-gaap	Profit Loss ProfitLoss	28522000	USD
CY2020Q2	nhc	Noncontrolling Interest Increase From Capital Contribution NoncontrollingInterestIncreaseFromCapitalContribution	244000	USD
CY2020Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	3780000	USD
CY2020Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	823000	USD
CY2020Q2	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	549000	USD
CY2020Q2	us-gaap	Dividends Common Stock DividendsCommonStock	7986000	USD
CY2020Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	769287000	USD
CY2020Q3	us-gaap	Profit Loss ProfitLoss	12868000	USD
CY2020Q3	nhc	Noncontrolling Interest Increase From Capital Contribution NoncontrollingInterestIncreaseFromCapitalContribution	1963000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	403000	USD
CY2020Q3	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	518000	USD
CY2020Q3	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	126000	USD
CY2020Q3	us-gaap	Dividends Common Stock DividendsCommonStock	7988000	USD
CY2020Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	777177000	USD
CY2021Q3	nhc	Number Of Skilled Nursing Centers NumberOfSkilledNursingCenters	75	pure
CY2021Q3	nhc	Number Of Beds NumberOfBeds	9473	pure
CY2021Q3	nhc	Number Of Assisted Living Facilities NumberOfAssistedLivingFacilities	24	pure
CY2021Q3	nhc	Number Of Homecare Programs NumberOfHomecarePrograms	34	pure
CY2021Q3	nhc	Number Of Hospice Agencies NumberOfHospiceAgencies	28	pure
CY2021Q3	us-gaap	Number Of States In Which Entity Operates NumberOfStatesInWhichEntityOperates	10	pure
	us-gaap	Use Of Estimates UseOfEstimates	<p style="font-family: "Times New Roman"; font-size: 10pt; font-variant: normal; text-align: justify; margin: 0pt;"><i>Estimates and Assumptions</i></p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p> <p style="font-family: "Times New Roman"; font-size: 10pt; font-variant: normal; text-align: justify; margin: 0pt; text-indent: 36pt;">The preparation of financial statements in conformity with U.S. GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates and could cause our reported net income to vary significantly from period to period, including but <em style="font: inherit;">not</em> limited to, the potential future effects of the novel coronavirus (“COVID-<em style="font: inherit;">19”</em>).</p> <p style="font-family:'Times New Roman';font-size:10pt;font-variant:normal;margin:0pt;"> </p>
CY2021Q3	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1452000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	3473000	USD
CY2020Q3	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1463000	USD
	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	3538000	USD
CY2021Q3	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	7396000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	5672000	USD
CY2021Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	5361000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	15615000	USD
CY2020Q3	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	5259000	USD
	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	15649000	USD
CY2021Q3	us-gaap	Contract With Customer Refund Liability ContractWithCustomerRefundLiability	6868000	USD
CY2020Q4	us-gaap	Contract With Customer Refund Liability ContractWithCustomerRefundLiability	7462000	USD
CY2021Q3	us-gaap	Continuing Care Retirement Communities Advance Fees Obligation For Future Services Amount ContinuingCareRetirementCommunitiesAdvanceFeesObligationForFutureServicesAmount	2177000	USD
CY2021Q3	nhc	Government Assistance Stimulus Income Cares Act GovernmentAssistanceStimulusIncomeCaresAct	10429000	USD
CY2020Q3	nhc	Government Assistance Stimulus Income Cares Act GovernmentAssistanceStimulusIncomeCaresAct	12132000	USD
	nhc	Government Assistance Stimulus Income Cares Act GovernmentAssistanceStimulusIncomeCaresAct	48304000	USD
	nhc	Government Assistance Stimulus Income Cares Act GovernmentAssistanceStimulusIncomeCaresAct	36780000	USD
	nhc	Proceeds From Medicare Accelerated And Advance Payment Program ProceedsFromMedicareAcceleratedAndAdvancePaymentProgram	51253000	USD
CY2021Q3	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	27013000	USD
CY2021Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	254817000	USD
CY2020Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	227383000	USD
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	708648000	USD
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	697149000	USD
CY2021Q3	nhc	Revenue From Contract With Customer Including Assessed Tax Percentage RevenueFromContractWithCustomerIncludingAssessedTaxPercentage	1	pure
CY2020Q3	nhc	Revenue From Contract With Customer Including Assessed Tax Percentage RevenueFromContractWithCustomerIncludingAssessedTaxPercentage	1	pure
	nhc	Revenue From Contract With Customer Including Assessed Tax Percentage RevenueFromContractWithCustomerIncludingAssessedTaxPercentage	1	pure
	nhc	Revenue From Contract With Customer Including Assessed Tax Percentage RevenueFromContractWithCustomerIncludingAssessedTaxPercentage	1	pure
CY2021Q3	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	27013000	USD
CY2020Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	51253000	USD
CY2020Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	51253000	USD
	nhc	Proceeds From Government Assistance Medicare Accelerated And Advance Payment Program ProceedsFromGovernmentAssistanceMedicareAcceleratedAndAdvancePaymentProgram	0	USD
	nhc	Government Assistance Medicare Accelerated And Advance Payment Program Payments Recouped GovernmentAssistanceMedicareAcceleratedAndAdvancePaymentProgramPaymentsRecouped	24240000	USD
CY2021Q3	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	27013000	USD
CY2021Q3	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	5792000	USD
CY2020Q3	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	5646000	USD
	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	16954000	USD
	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	16972000	USD
CY2021Q3	nhc	Management And Accounting Services Fees Revenue ManagementAndAccountingServicesFeesRevenue	4244000	USD
CY2020Q3	nhc	Management And Accounting Services Fees Revenue ManagementAndAccountingServicesFeesRevenue	4052000	USD
	nhc	Management And Accounting Services Fees Revenue ManagementAndAccountingServicesFeesRevenue	12703000	USD
	nhc	Management And Accounting Services Fees Revenue ManagementAndAccountingServicesFeesRevenue	12651000	USD
CY2021Q3	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	1291000	USD
CY2020Q3	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	1294000	USD
	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	3832000	USD
	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	4074000	USD
CY2021Q3	nhc	Miscellaneous Revenue MiscellaneousRevenue	164000	USD
CY2020Q3	nhc	Miscellaneous Revenue MiscellaneousRevenue	119000	USD
	nhc	Miscellaneous Revenue MiscellaneousRevenue	427000	USD
	nhc	Miscellaneous Revenue MiscellaneousRevenue	766000	USD
CY2021Q3	nhc	Other Revenues OtherRevenues	11491000	USD
CY2020Q3	nhc	Other Revenues OtherRevenues	11111000	USD
	nhc	Other Revenues OtherRevenues	33916000	USD
	nhc	Other Revenues OtherRevenues	34463000	USD
CY2020Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	3019000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	5320000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	8448000	USD
CY2021Q3	nhc	Dividends And Other Net Realized Gains And Losses On Sales Of Securities DividendsAndOtherNetRealizedGainsAndLossesOnSalesOfSecurities	2365000	USD
CY2020Q3	nhc	Dividends And Other Net Realized Gains And Losses On Sales Of Securities DividendsAndOtherNetRealizedGainsAndLossesOnSalesOfSecurities	2084000	USD
	nhc	Dividends And Other Net Realized Gains And Losses On Sales Of Securities DividendsAndOtherNetRealizedGainsAndLossesOnSalesOfSecurities	6242000	USD
	nhc	Dividends And Other Net Realized Gains And Losses On Sales Of Securities DividendsAndOtherNetRealizedGainsAndLossesOnSalesOfSecurities	5997000	USD
CY2021Q3	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	1020000	USD
CY2020Q3	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	1375000	USD
	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	3683000	USD
	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	4425000	USD
CY2021Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	3399000	USD
CY2020Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	6478000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	15245000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	18870000	USD
CY2021Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	254817000	USD
CY2021Q3	nhc	Other Revenues OtherRevenues	11491000	USD
CY2021Q3	nhc	Government Assistance Stimulus Income Cares Act GovernmentAssistanceStimulusIncomeCaresAct	10429000	USD
CY2021Q3	us-gaap	Revenues Revenues	276737000	USD
CY2021Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	159305000	USD
CY2021Q3	us-gaap	Costs And Expenses CostsAndExpenses	263975000	USD
CY2021Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	12762000	USD
CY2021Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	3399000	USD
CY2021Q3	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-23797000	USD
CY2021Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-7636000	USD
CY2020Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	227383000	USD
CY2020Q3	nhc	Other Revenues OtherRevenues	11111000	USD
CY2020Q3	nhc	Government Assistance Stimulus Income Cares Act GovernmentAssistanceStimulusIncomeCaresAct	12132000	USD
CY2020Q3	us-gaap	Revenues Revenues	250626000	USD
CY2021Q3	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	84039000	USD
CY2021Q3	us-gaap	Operating Lease Expense OperatingLeaseExpense	10204000	USD
CY2021Q3	us-gaap	Depreciation And Amortization DepreciationAndAmortization	10229000	USD
CY2021Q3	us-gaap	Interest Expense InterestExpense	198000	USD
CY2020Q3	us-gaap	Labor And Related Expense LaborAndRelatedExpense	151564000	USD
CY2020Q3	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	70887000	USD
CY2020Q3	us-gaap	Operating Lease Expense OperatingLeaseExpense	10320000	USD
CY2020Q3	us-gaap	Depreciation And Amortization DepreciationAndAmortization	10548000	USD
CY2020Q3	us-gaap	Interest Expense InterestExpense	285000	USD
CY2020Q3	us-gaap	Costs And Expenses CostsAndExpenses	243604000	USD
CY2020Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	7022000	USD
CY2020Q3	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	6478000	USD
CY2020Q3	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-241000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	13259000	USD
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	708648000	USD
	nhc	Other Revenues OtherRevenues	33916000	USD
	nhc	Government Assistance Stimulus Income Cares Act GovernmentAssistanceStimulusIncomeCaresAct	48304000	USD
	us-gaap	Revenues Revenues	790868000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	461239000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	226235000	USD
	us-gaap	Operating Lease Expense OperatingLeaseExpense	30437000	USD
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	30521000	USD
	us-gaap	Interest Expense InterestExpense	657000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	749089000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	41779000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	15245000	USD
	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain	95202000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-23227000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	128999000	USD
	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	697149000	USD
	nhc	Other Revenues OtherRevenues	34463000	USD
	nhc	Government Assistance Stimulus Income Cares Act GovernmentAssistanceStimulusIncomeCaresAct	36780000	USD
	us-gaap	Revenues Revenues	768392000	USD
	us-gaap	Labor And Related Expense LaborAndRelatedExpense	455947000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	213416000	USD
	us-gaap	Operating Lease Expense OperatingLeaseExpense	30972000	USD
	us-gaap	Depreciation And Amortization DepreciationAndAmortization	31531000	USD
	us-gaap	Interest Expense InterestExpense	1150000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	733016000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	35376000	USD
	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	18870000	USD
	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain	1708000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-40580000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	15374000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	0	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	34387000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	0	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	14300000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	12567000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	189718000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	5200000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	36086000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	5200000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	35416000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	2167000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	34943000	USD
CY2021Q3	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	0	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	34586000	USD
CY2021Q3	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	896000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	27168000	USD
CY2021Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	11671000	USD
CY2021Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	162550000	USD
CY2021Q3	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	4626000	USD
CY2021Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	27289000	USD
CY2021Q3	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	7045000	USD
CY2021Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	135261000	USD
CY2021Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15364043
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15310754
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15347042
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15304235
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	-3348000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	12849000	USD
	us-gaap	Net Income Loss NetIncomeLoss	122802000	USD
	us-gaap	Net Income Loss NetIncomeLoss	14321000	USD
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.22
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.84
	us-gaap	Net Income Loss NetIncomeLoss	14321000	USD
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.22
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.84
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	7.97
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.93
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	8.00
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.94
CY2021Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0
CY2020Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	60557
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	67641
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	64540
CY2021Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	15364043
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	15371311
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	15414683
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	15368775
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	-3348000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	12849000	USD
	us-gaap	Net Income Loss NetIncomeLoss	122802000	USD
CY2021Q3	nhc	Marketable Securities Availableforsale Amortized Cost MarketableSecuritiesAvailableforsaleAmortizedCost	225958000	USD
CY2021Q3	us-gaap	Marketable Securities MarketableSecurities	304534000	USD
CY2020Q4	nhc	Marketable Securities Availableforsale Amortized Cost MarketableSecuritiesAvailableforsaleAmortizedCost	218396000	USD
CY2020Q4	us-gaap	Marketable Securities MarketableSecurities	323105000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	34690000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	34792000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	49694000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	49863000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	97382000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	99947000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	99143000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	103002000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	38060000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	38901000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	34326000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	36685000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	497000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	361000	USD
	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	89129000	USD
CY2021Q3	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-23797000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-23227000	USD
CY2020Q3	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-241000	USD
	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-40580000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	4288000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	6759000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	796000	USD
	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Remaining Contractual Term2 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2	P1Y
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	481000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	274000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	285000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	170629000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	174121000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	183437000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	189835000	USD
CY2021Q3	nhc	Equity Securities Fv Ni Gross Unrealized Gain EquitySecuritiesFvNiGrossUnrealizedGain	76151000	USD
CY2020Q4	nhc	Equity Securities Fv Ni Gross Unrealized Gain EquitySecuritiesFvNiGrossUnrealizedGain	98445000	USD
CY2021Q3	nhc	Equity Securities Fv Ni Gross Unrealized Loss EquitySecuritiesFvNiGrossUnrealizedLoss	1067000	USD
CY2020Q4	nhc	Equity Securities Fv Ni Gross Unrealized Loss EquitySecuritiesFvNiGrossUnrealizedLoss	134000	USD
	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	28004000	USD
	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	941000	USD
	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	135000	USD
CY2021Q3	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020Q4	us-gaap	Goodwill Goodwill	21341000	USD
	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	146954000	USD
CY2021Q3	us-gaap	Goodwill Goodwill	168295000	USD
CY2021Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	726000	USD
CY2020Q3	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	518000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1905000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1807000	USD
CY2021Q3	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	1767000	USD
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0021	pure
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0087	pure
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.351	pure
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.201	pure
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P2Y2M12D
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P2Y2M12D
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0301	pure
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0291	pure
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	809529
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	71.24
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	104057
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	73.98
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	43630
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	63.37
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	3000
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	72.94
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	866956
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	72.11
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	56795
	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	70.73
	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	148900
	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	68.41
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	6000
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	72.94
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	768851
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	72.72
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	656425	USD
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	177686
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	69.38
CY2021Q3	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	587578	USD
CY2021Q3	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	72.72
CY2020Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.030	pure
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.046	pure
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.052	pure
CY2021Q3	nhc	Effective Income Tax Rate Reconciliation Benefit Resulting From Expiration Of Applicable Statute Limitations Amount EffectiveIncomeTaxRateReconciliationBenefitResultingFromExpirationOfApplicableStatuteLimitationsAmount	1444000	USD
CY2020Q3	nhc	Effective Income Tax Rate Reconciliation Benefit Resulting From Expiration Of Applicable Statute Limitations Amount EffectiveIncomeTaxRateReconciliationBenefitResultingFromExpirationOfApplicableStatuteLimitationsAmount	2234000	USD
CY2021Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.536	pure
CY2021Q3	us-gaap	Self Insurance Reserve SelfInsuranceReserve	103824000	USD
CY2020Q4	us-gaap	Self Insurance Reserve SelfInsuranceReserve	99537000	USD

Files In Submission

Name	View Source	Status
0001437749-21-025293-index-headers.html	Edgar Link	pending
0001437749-21-025293-index.html	Edgar Link	pending
0001437749-21-025293.txt	Edgar Link	pending
0001437749-21-025293-xbrl.zip	Edgar Link	pending
ex_299287.htm	Edgar Link	pending
ex_299288.htm	Edgar Link	pending
ex_299289.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
nhc-20210930.xsd	Edgar Link	pending
nhc-20210930_cal.xml	Edgar Link	unprocessable
nhc-20210930_def.xml	Edgar Link	unprocessable
nhc-20210930_lab.xml	Edgar Link	unprocessable
nhc-20210930_pre.xml	Edgar Link	unprocessable
nhc01.jpg	Edgar Link	pending
nhc20210930_10q.htm	Edgar Link	pending
nhc20210930_10q_htm.xml	Edgar Link	completed
R1.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$NHC
NATIONAL HEALTHCARE CORP Stock $nhc

2021 Q4 Form 10-Q Financial Statement

#000143774921025293 Filed on November 04, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NHC NATIONAL HEALTHCARE CORP Stock $nhc

2021 Q4 Form 10-Q Financial Statement

#000143774921025293 Filed on November 04, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NHC
NATIONAL HEALTHCARE CORP Stock $nhc