$NHC
NATIONAL HEALTHCARE CORP Stock $nhc

$nhc Overview Financials Valuation SEC Filings Company Website

2024 Q1 Form 10-K Financial Statement

#000143774924004619 Filed on February 16, 2024

Income Statement

Concept	2024 Q1	2023 Q4	2023
Revenue	$297.2M	$300.9M	$1.142B
YoY Change	10.24%	13.74%	5.14%
Cost Of Revenue	$183.1M	$186.6M	$712.3M
YoY Change	9.13%	11.49%	3.81%
Gross Profit	$114.0M	$114.4M	$429.2M
YoY Change	12.09%	17.63%	7.42%
Gross Profit Margin	38.37%	38.0%	37.6%
Selling, General & Admin	$10.35M	$11.44M	$41.53M
YoY Change	2.54%	12.06%	1.34%
% of Gross Profit	9.07%	10.0%	9.67%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$10.59M	$11.77M	$42.03M
YoY Change	5.35%	12.31%	3.82%
% of Gross Profit	9.28%	10.29%	9.79%
Operating Expenses	$98.36M	$94.18M	$371.7M
YoY Change	7.35%	2.61%	0.24%
Operating Profit	$15.63M	$20.18M	$57.13M
YoY Change	56.1%	271.29%	79.13%
Interest Expense	$46.00K	$11.95M	$324.0K
YoY Change	-53.06%	-782.96%	-42.45%
% of Operating Profit	0.29%	59.2%	0.57%
Other Income/Expense, Net	$5.685M	$4.544M	$16.66M
YoY Change	31.51%		49.54%
Pretax Income	$35.71M	$36.67M	$88.74M
YoY Change	127.17%	394.6%	225.87%
Income Tax	$9.462M	$8.700M	$23.45M
% Of Pretax Income	26.49%	23.73%	26.43%
Net Earnings	$26.21M	$28.41M	$66.80M
YoY Change	123.6%	347.13%	197.61%
Net Earnings / Revenue	8.82%	9.44%	5.85%
Basic Earnings Per Share	$1.71		$4.36
Diluted Earnings Per Share	$1.69	$1.83	$4.34
COMMON SHARES
Basic Shares Outstanding	15.35M	15.32M	15.31M
Diluted Shares Outstanding	15.51M		15.38M

Balance Sheet

Concept	2024 Q1	2023 Q4	2023
SHORT-TERM ASSETS
Cash & Short-Term Investments	$371.0M	$372.7M	$223.6M
YoY Change	19.83%	14.87%	22.47%
Cash & Equivalents	$93.98M	$107.1M	$107.1M
Short-Term Investments	$277.0M	$265.6M	$116.5M
Other Short-Term Assets	$67.17M	$66.18M	$66.18M
YoY Change	6.56%	3.46%	3.46%
Inventory	$6.763M	$7.386M	$7.386M
Prepaid Expenses
Receivables	$125.7M	$108.5M	$108.5M
Other Receivables	$487.0K	$503.0K	$503.0K
Total Short-Term Assets	$417.6M	$406.2M	$406.2M
YoY Change	23.58%	14.78%	14.78%
LONG-TERM ASSETS
Property, Plant & Equipment	$488.7M	$493.3M	$587.5M
YoY Change	-2.87%	-2.61%	-6.3%
Goodwill	$168.3M	$168.3M
YoY Change	0.0%	0.0%
Intangibles	$7.038M	$7.038M
YoY Change	0.0%	0.0%
Long-Term Investments	$16.75M	$16.27M	$16.27M
YoY Change	365.97%	689.66%	689.66%
Other Assets	$413.4M	$411.2M	$125.4M
YoY Change	-2.59%	-0.9%	7.14%
Total Long-Term Assets	$902.1M	$904.6M	$904.6M
YoY Change	-2.74%	-1.84%	-1.84%
TOTAL ASSETS
Total Short-Term Assets	$417.6M	$406.2M	$406.2M
Total Long-Term Assets	$902.1M	$904.6M	$904.6M
Total Assets	$1.320B	$1.311B	$1.311B
YoY Change	4.29%	2.77%	2.77%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$20.70M	$19.19M	$19.19M
YoY Change	59.95%	13.19%	13.19%
Accrued Expenses	$124.7M	$144.0M	$144.0M
YoY Change	6.38%	8.32%	8.32%
Deferred Revenue	$7.667M	$0.00
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$0.00	$860.0K	$860.0K
YoY Change	-100.0%	-82.75%	-82.75%
Total Short-Term Liabilities	$206.4M	$214.5M	$214.5M
YoY Change	12.67%	8.38%	8.38%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change		-100.0%	-100.0%
Other Long-Term Liabilities	$27.91M	$26.38M	$168.6M
YoY Change	5.29%	32.21%	-10.43%
Total Long-Term Liabilities	$27.91M	$26.38M	$168.6M
YoY Change	5.29%	32.21%	-10.84%
TOTAL LIABILITIES
Total Short-Term Liabilities	$206.4M	$214.5M	$214.5M
Total Long-Term Liabilities	$27.91M	$26.38M	$168.6M
Total Liabilities	$393.1M	$400.3M	$402.0M
YoY Change	1.99%	0.6%	0.22%
SHAREHOLDERS EQUITY
Retained Earnings	$704.7M	$687.6M
YoY Change	6.83%	4.71%
Common Stock	$154.0K	$153.0K
YoY Change	0.65%	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$924.7M	$908.8M	$908.8M
YoY Change
Total Liabilities & Shareholders Equity	$1.320B	$1.311B	$1.311B
YoY Change	4.29%	2.77%	2.77%

Cashflow Statement

Concept	2024 Q1	2023 Q4	2023
OPERATING ACTIVITIES
Net Income	$26.21M	$28.41M	$66.80M
YoY Change	123.6%	347.13%	197.61%
Depreciation, Depletion And Amortization	$10.59M	$11.77M	$42.03M
YoY Change	5.35%	12.31%	3.82%
Cash From Operating Activities	$9.646M	$25.73M	$111.2M
YoY Change	-30.39%	115.63%	1172.2%
INVESTING ACTIVITIES
Capital Expenditures	$5.955M	$8.601M	$27.90M
YoY Change	-10.32%	52.58%	-7.61%
Acquisitions
YoY Change
Other Investing Activities	$3.540M	-$1.585M	$10.33M
YoY Change	-32.09%	-118.72%	-57.34%
Cash From Investing Activities	-$2.415M	-$10.19M	-$17.57M
YoY Change	69.24%	-459.68%	193.88%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$2.169M
YoY Change			-72.15%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-$12.07M	-9.834M	-$42.55M
YoY Change	-4.37%	-18.73%	-10.7%
NET CHANGE
Cash From Operating Activities	$9.646M	25.73M	$111.2M
Cash From Investing Activities	-$2.415M	-10.19M	-$17.57M
Cash From Financing Activities	-$12.07M	-9.834M	-$42.55M
Net Change In Cash	-$4.836M	5.713M	$51.10M
YoY Change	2458.73%	114.37%	-213.87%
FREE CASH FLOW
Cash From Operating Activities	$9.646M	$25.73M	$111.2M
Capital Expenditures	$5.955M	$8.601M	$27.90M
Free Cash Flow	$3.691M	$17.13M	$83.32M
YoY Change	-48.86%	172.07%	-488.27%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2023	dei	Amendment Flag AmendmentFlag	false
CY2023	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2023	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2023	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	15377343
CY2023Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2023Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	45000000
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	45000000
CY2023Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	15350661
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	15350661
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	15357746
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	15357746
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.11
CY2022	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.26
CY2023	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.34
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Thereafter LessorOperatingLeasePaymentsToBeReceivedThereafter	0	usd
CY2023	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	2015000	usd
CY2023	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	pure
CY2023Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	0	usd
CY2022	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0	usd
CY2021	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0	usd
CY2023	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P2Y
CY2023	ecd	Rule10b51 Arr Adopted Flag Rule10b51ArrAdoptedFlag	false
CY2023	ecd	Non Rule10b51 Arr Adopted Flag NonRule10b51ArrAdoptedFlag	false
CY2023	ecd	Rule10b51 Arr Trmntd Flag Rule10b51ArrTrmntdFlag	false
CY2023	ecd	Non Rule10b51 Arr Trmntd Flag NonRule10b51ArrTrmntdFlag	false
CY2023	dei	Document Type DocumentType	10-K
CY2023	dei	Document Annual Report DocumentAnnualReport	true
CY2023	dei	Document Period End Date DocumentPeriodEndDate	2023-12-31
CY2023	dei	Document Transition Report DocumentTransitionReport	false
CY2023	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2023	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	52-2057472
CY2023	dei	Entity Address Address Line1 EntityAddressAddressLine1	100 E. Vine Street
CY2023	dei	Entity Address City Or Town EntityAddressCityOrTown	Murfreesboro
CY2023	dei	Entity Address State Or Province EntityAddressStateOrProvince	TN
CY2023	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	37130
CY2023	dei	City Area Code CityAreaCode	615
CY2023	dei	Security12b Title Security12bTitle	Shares of Common Stock
CY2023	dei	Trading Symbol TradingSymbol	NHC
CY2023	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2023	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2023	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2023	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2023	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2023	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2023	dei	Entity Small Business EntitySmallBusiness	false
CY2023	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2023	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2023	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2023	dei	Entity Shell Company EntityShellCompany	false
CY2023Q2	dei	Entity Public Float EntityPublicFloat	546000000	usd
CY2024Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	15349989
CY2023	dei	Auditor Name AuditorName	Ernst & Young LLP
CY2023	dei	Auditor Location AuditorLocation	Nashville, Tennessee
CY2023	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	1087614000	usd
CY2022	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	1029085000	usd
CY2021	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	965542000	usd
CY2023	nhc	Other Revenues OtherRevenues	53930000	usd
CY2022	nhc	Other Revenues OtherRevenues	45196000	usd
CY2021	nhc	Other Revenues OtherRevenues	45400000	usd
CY2023	nhc	Government Assistance Stimulus Income Cares Act GovernmentAssistanceStimulusIncomeCaresAct	0	usd
CY2022	nhc	Government Assistance Stimulus Income Cares Act GovernmentAssistanceStimulusIncomeCaresAct	11457000	usd
CY2021	nhc	Government Assistance Stimulus Income Cares Act GovernmentAssistanceStimulusIncomeCaresAct	63360000	usd
CY2023	us-gaap	Revenues Revenues	1141544000	usd
CY2022	us-gaap	Revenues Revenues	1085738000	usd
CY2021	us-gaap	Revenues Revenues	1074302000	usd
CY2023	us-gaap	Labor And Related Expense LaborAndRelatedExpense	712344000	usd
CY2022	us-gaap	Labor And Related Expense LaborAndRelatedExpense	686169000	usd
CY2021	us-gaap	Labor And Related Expense LaborAndRelatedExpense	666063000	usd
CY2023	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	288183000	usd
CY2022	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	289372000	usd
CY2021	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	266754000	usd
CY2023	us-gaap	Operating Lease Expense OperatingLeaseExpense	41525000	usd
CY2022	us-gaap	Operating Lease Expense OperatingLeaseExpense	40977000	usd
CY2021	us-gaap	Operating Lease Expense OperatingLeaseExpense	40818000	usd
CY2023	us-gaap	Depreciation And Amortization DepreciationAndAmortization	42034000	usd
CY2022	us-gaap	Depreciation And Amortization DepreciationAndAmortization	40489000	usd
CY2021	us-gaap	Depreciation And Amortization DepreciationAndAmortization	40672000	usd
CY2023	us-gaap	Interest Expense InterestExpense	324000	usd
CY2022	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-12946000	usd
CY2022	us-gaap	Interest Expense InterestExpense	563000	usd
CY2021	us-gaap	Interest Expense InterestExpense	845000	usd
CY2023	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	usd
CY2022	us-gaap	Asset Impairment Charges AssetImpairmentCharges	-3728000	usd
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	8225000	usd
CY2023	us-gaap	Costs And Expenses CostsAndExpenses	1084410000	usd
CY2022	us-gaap	Costs And Expenses CostsAndExpenses	1053842000	usd
CY2021	us-gaap	Costs And Expenses CostsAndExpenses	1023377000	usd
CY2023	us-gaap	Operating Income Loss OperatingIncomeLoss	57134000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	31896000	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	50925000	usd
CY2023	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	16660000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	11141000	usd
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	17774000	usd
CY2023	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain	0	usd
CY2022	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain	0	usd
CY2021	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain	95202000	usd
CY2023	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	14944000	usd
CY2022	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-15806000	usd
CY2021	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-13863000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	88738000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	27231000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	150038000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	23450000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7254000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10951000	usd
CY2023	us-gaap	Profit Loss ProfitLoss	65288000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	19977000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	139087000	usd
CY2023	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-1510000	usd
CY2022	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-2468000	usd
CY2021	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	497000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	66798000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	22445000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	138590000	usd
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.36
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.46
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	9.03
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.34
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.45
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	8.99
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15310142
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15410222
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15347129
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	15447211
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	15416716
CY2023	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.34
CY2022	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.26
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	2.11
CY2023	us-gaap	Profit Loss ProfitLoss	65288000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	19977000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	139087000	usd
CY2023	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	3434000	usd
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-4171000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-17000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	129000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	214000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	523000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-1938000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-933000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2928000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-11137000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-3452000	usd
CY2023	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-1510000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-2468000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	497000	usd
CY2023	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	69726000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	11308000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	135138000	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	107076000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	58667000	usd
CY2023Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	17725000	usd
CY2022Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	15121000	usd
CY2023Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	111117000	usd
CY2022Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	100786000	usd
CY2023Q4	us-gaap	Debt Securities Current DebtSecuritiesCurrent	5427000	usd
CY2022Q4	us-gaap	Debt Securities Current DebtSecuritiesCurrent	23136000	usd
CY2023Q4	us-gaap	Equity Securities Fv Ni Restricted EquitySecuritiesFvNiRestricted	26779000	usd
CY2022Q4	us-gaap	Equity Securities Fv Ni Restricted EquitySecuritiesFvNiRestricted	22358000	usd
CY2023Q4	nhc	Restricted Marketable Debt Securities Current RestrictedMarketableDebtSecuritiesCurrent	12822000	usd
CY2022Q4	nhc	Restricted Marketable Debt Securities Current RestrictedMarketableDebtSecuritiesCurrent	16244000	usd
CY2023Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	108545000	usd
CY2022Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	99986000	usd
CY2023Q4	us-gaap	Inventory Net InventoryNet	7386000	usd
CY2022Q4	us-gaap	Inventory Net InventoryNet	7088000	usd
CY2023Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	8855000	usd
CY2022Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	10244000	usd
CY2023Q4	us-gaap	Notes And Loans Receivable Net Current NotesAndLoansReceivableNetCurrent	503000	usd
CY2022Q4	us-gaap	Notes And Loans Receivable Net Current NotesAndLoansReceivableNetCurrent	302000	usd
CY2023Q4	us-gaap	Assets Current AssetsCurrent	406235000	usd
CY2022Q4	us-gaap	Assets Current AssetsCurrent	353932000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1101681000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1081219000	usd
CY2023Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	608352000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	574687000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	493329000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	506532000	usd
CY2023Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	1167000	usd
CY2022Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	1077000	usd
CY2023Q4	nhc	Restricted Marketable Debt Securities Noncurrent RestrictedMarketableDebtSecuritiesNoncurrent	109478000	usd
CY2022Q4	nhc	Restricted Marketable Debt Securities Noncurrent RestrictedMarketableDebtSecuritiesNoncurrent	103267000	usd
CY2023Q4	us-gaap	Deposits Assets Noncurrent DepositsAssetsNoncurrent	14786000	usd
CY2022Q4	us-gaap	Deposits Assets Noncurrent DepositsAssetsNoncurrent	12728000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	94201000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	120521000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	168295000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	168295000	usd
CY2023Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	7038000	usd
CY2022Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	7038000	usd
CY2023Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	16267000	usd
CY2022Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	2060000	usd
CY2023Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	411232000	usd
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	414986000	usd
CY2023Q4	us-gaap	Assets Assets	1310796000	usd
CY2022Q4	us-gaap	Assets Assets	1275450000	usd
CY2023Q4	us-gaap	Accounts Payable Trade Current AccountsPayableTradeCurrent	19194000	usd
CY2022Q4	us-gaap	Accounts Payable Trade Current AccountsPayableTradeCurrent	16958000	usd
CY2023Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	860000	usd
CY2022Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	4985000	usd
CY2023Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	29352000	usd
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	29075000	usd
CY2023Q4	us-gaap	Accrued Salaries Current AccruedSalariesCurrent	84110000	usd
CY2022Q4	us-gaap	Accrued Salaries Current AccruedSalariesCurrent	72510000	usd
CY2023Q4	us-gaap	Accounts Payable Other Current AccountsPayableOtherCurrent	18369000	usd
CY2022Q4	us-gaap	Accounts Payable Other Current AccountsPayableOtherCurrent	16631000	usd
CY2023Q4	us-gaap	Self Insurance Reserve Current SelfInsuranceReserveCurrent	30549000	usd
CY2022Q4	us-gaap	Self Insurance Reserve Current SelfInsuranceReserveCurrent	31365000	usd
CY2023Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	22991000	usd
CY2022Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	17615000	usd
CY2023Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	9051000	usd
CY2022Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	8748000	usd
CY2023Q4	us-gaap	Liabilities Current LiabilitiesCurrent	214476000	usd
CY2022Q4	us-gaap	Liabilities Current LiabilitiesCurrent	197887000	usd
CY2023Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	0	usd
CY2022Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	860000	usd
CY2023Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	63175000	usd
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	91016000	usd
CY2023Q4	us-gaap	Self Insurance Reserve Noncurrent SelfInsuranceReserveNoncurrent	72710000	usd
CY2022Q4	us-gaap	Self Insurance Reserve Noncurrent SelfInsuranceReserveNoncurrent	71104000	usd
CY2023Q4	us-gaap	Contract With Customer Refund Liability Noncurrent ContractWithCustomerRefundLiabilityNoncurrent	6376000	usd
CY2022Q4	us-gaap	Contract With Customer Refund Liability Noncurrent ContractWithCustomerRefundLiabilityNoncurrent	6207000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	17200000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	10909000	usd
CY2023Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	26379000	usd
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	19953000	usd
CY2023Q4	us-gaap	Liabilities Liabilities	400316000	usd
CY2022Q4	us-gaap	Liabilities Liabilities	397936000	usd
CY2023Q4	us-gaap	Common Stock Value CommonStockValue	153000	usd
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	153000	usd
CY2023Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	227604000	usd
CY2022Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	226991000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	687599000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	656664000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-6604000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-9532000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	908752000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	874276000	usd
CY2023Q4	us-gaap	Minority Interest MinorityInterest	1728000	usd
CY2022Q4	us-gaap	Minority Interest MinorityInterest	3238000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	19977000	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	910480000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	877514000	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1310796000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1275450000	usd
CY2023	us-gaap	Profit Loss ProfitLoss	65288000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	139087000	usd
CY2023	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	42034000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	40489000	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	40672000	usd
CY2023	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	2015000	usd
CY2022	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	477000	usd
CY2021	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	5111000	usd
CY2023	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	470000	usd
CY2022	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	439000	usd
CY2021	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	6314000	usd
CY2023	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	14944000	usd
CY2022	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-15806000	usd
CY2021	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-13863000	usd
CY2023	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	-667000	usd
CY2022	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	-1326000	usd
CY2021	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	1042000	usd
CY2023	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain	-0	usd
CY2022	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain	-0	usd
CY2021	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain	95202000	usd
CY2023	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	6230000	usd
CY2022	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-0	usd
CY2021	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-0	usd
CY2023	nhc	Asset Impairment Charges Recoveries AssetImpairmentChargesRecoveries	-0	usd
CY2022	nhc	Asset Impairment Charges Recoveries AssetImpairmentChargesRecoveries	3728000	usd
CY2021	nhc	Asset Impairment Charges Recoveries AssetImpairmentChargesRecoveries	-8225000	usd
CY2023	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-5768000	usd
CY2022	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-5995000	usd
CY2021	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	6294000	usd
CY2023	us-gaap	Share Based Compensation ShareBasedCompensation	2782000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	2612000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	2620000	usd
CY2023	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	8559000	usd
CY2022	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	3862000	usd
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-4090000	usd
CY2023	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	298000	usd
CY2022	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-1494000	usd
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-199000	usd
CY2023	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	669000	usd
CY2022	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	11111000	usd
CY2021	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	3298000	usd
CY2023	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-1244000	usd
CY2022	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-430000	usd
CY2021	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	0	usd
CY2023	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	2236000	usd
CY2022	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	-5530000	usd
CY2021	us-gaap	Increase Decrease In Accounts Payable Trade IncreaseDecreaseInAccountsPayableTrade	-2083000	usd
CY2023	us-gaap	Increase Decrease In Accrued Salaries IncreaseDecreaseInAccruedSalaries	11600000	usd
CY2022	us-gaap	Increase Decrease In Accrued Salaries IncreaseDecreaseInAccruedSalaries	-34188000	usd
CY2021	us-gaap	Increase Decrease In Accrued Salaries IncreaseDecreaseInAccruedSalaries	17292000	usd
CY2023	nhc	Increase Decrease In Due To Third Party Payors IncreaseDecreaseInDueToThirdPartyPayors	1738000	usd
CY2022	nhc	Increase Decrease In Due To Third Party Payors IncreaseDecreaseInDueToThirdPartyPayors	-964000	usd
CY2021	nhc	Increase Decrease In Due To Third Party Payors IncreaseDecreaseInDueToThirdPartyPayors	649000	usd
CY2023	us-gaap	Increase Decrease In Self Insurance Reserve IncreaseDecreaseInSelfInsuranceReserve	790000	usd
CY2022	us-gaap	Increase Decrease In Self Insurance Reserve IncreaseDecreaseInSelfInsuranceReserve	4421000	usd
CY2021	us-gaap	Increase Decrease In Self Insurance Reserve IncreaseDecreaseInSelfInsuranceReserve	-1489000	usd
CY2023	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	0	usd
CY2022	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-9443000	usd
CY2021	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-6625000	usd
CY2023	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	0	usd
CY2022	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-15022000	usd
CY2021	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-36231000	usd
CY2023	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	5376000	usd
CY2022	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-2444000	usd
CY2021	us-gaap	Increase Decrease In Other Current Liabilities IncreaseDecreaseInOtherCurrentLiabilities	-1380000	usd
CY2023	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	6426000	usd
CY2022	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	3382000	usd
CY2021	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-11862000	usd
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	111216000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	8742000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	62394000	usd
CY2023	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	27901000	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	30200000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	39399000	usd
CY2023	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	0	usd
CY2022	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	4175000	usd
CY2021	us-gaap	Proceeds From Sale Of Other Real Estate ProceedsFromSaleOfOtherRealEstate	0	usd
CY2023	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	2700000	usd
CY2022	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	-0	usd
CY2021	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	-0	usd
CY2023	nhc	Payments For Proceeds From Unconsolidated Investments PaymentsForProceedsFromUnconsolidatedInvestments	4661000	usd
CY2022	nhc	Payments For Proceeds From Unconsolidated Investments PaymentsForProceedsFromUnconsolidatedInvestments	-0	usd
CY2021	nhc	Payments For Proceeds From Unconsolidated Investments PaymentsForProceedsFromUnconsolidatedInvestments	350000	usd
CY2023	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	-0	usd
CY2022	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	-0	usd
CY2021	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	28713000	usd
CY2023	nhc	Payments For Proceeds From Notes Receivable Total PaymentsForProceedsFromNotesReceivableTotal	201000	usd
CY2022	nhc	Payments For Proceeds From Notes Receivable Total PaymentsForProceedsFromNotesReceivableTotal	-3879000	usd
CY2021	nhc	Payments For Proceeds From Notes Receivable Total PaymentsForProceedsFromNotesReceivableTotal	-8840000	usd
CY2023	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	29501000	usd
CY2022	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	33793000	usd
CY2021	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	108187000	usd
CY2023	us-gaap	Proceeds From Sale Of Restricted Investments ProceedsFromSaleOfRestrictedInvestments	47396000	usd
CY2022	us-gaap	Proceeds From Sale Of Restricted Investments ProceedsFromSaleOfRestrictedInvestments	49961000	usd
CY2021	us-gaap	Proceeds From Sale Of Restricted Investments ProceedsFromSaleOfRestrictedInvestments	101920000	usd
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-17568000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-5978000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-65889000	usd
CY2023	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	4985000	usd
CY2022	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	4695000	usd
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	4423000	usd
CY2023	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	35560000	usd
CY2022	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	34604000	usd
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	32030000	usd
CY2023	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	313000	usd
CY2022	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	2114000	usd
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	3441000	usd
CY2023	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2482000	usd
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	9903000	usd
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	836000	usd
CY2023	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	0	usd
CY2022	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	250000	usd
CY2021	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	-964000	usd
CY2023	nhc	Entrance Fee Deposits Refunds EntranceFeeDepositsRefunds	169000	usd
CY2022	nhc	Entrance Fee Deposits Refunds EntranceFeeDepositsRefunds	-804000	usd
CY2021	nhc	Entrance Fee Deposits Refunds EntranceFeeDepositsRefunds	-452000	usd
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-42545000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-47642000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-35264000	usd
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	51103000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-44878000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-38759000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	74865000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	119743000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	158502000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	125968000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	74865000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	119743000	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	107076000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	58667000	usd
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	107607000	usd
CY2023Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	18892000	usd
CY2022Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	16198000	usd
CY2021Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	12136000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	125968000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	74865000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	119743000	usd
CY2023	us-gaap	Interest Paid Net InterestPaidNet	290000	usd
CY2022	us-gaap	Interest Paid Net InterestPaidNet	493000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	845000	usd
CY2023	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	14571000	usd
CY2022	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	8765000	usd
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	22881000	usd
CY2023	us-gaap	Contribution Of Property ContributionOfProperty	0	usd
CY2022	us-gaap	Contribution Of Property ContributionOfProperty	0	usd
CY2021	us-gaap	Contribution Of Property ContributionOfProperty	2840000	usd
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	798260000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	139087000	usd
CY2021	nhc	Noncontrolling Interest Increase From Capital Contribution NoncontrollingInterestIncreaseFromCapitalContribution	1876000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-3452000	usd
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2620000	usd
CY2021	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	3441000	usd
CY2021	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	836000	usd
CY2021	us-gaap	Dividends Common Stock DividendsCommonStock	32536000	usd
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	908460000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	19977000	usd
CY2022	nhc	Noncontrolling Interest Increase From Capital Contribution NoncontrollingInterestIncreaseFromCapitalContribution	250000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-11137000	usd
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2612000	usd
CY2022	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	2114000	usd
CY2022	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	9903000	usd
CY2022	us-gaap	Dividends Common Stock DividendsCommonStock	34859000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	877514000	usd
CY2023	us-gaap	Profit Loss ProfitLoss	65288000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2928000	usd
CY2023	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2782000	usd
CY2023	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	313000	usd
CY2021	nhc	Management And Accounting Services Fees Revenue ManagementAndAccountingServicesFeesRevenue	17139000	usd
CY2023	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	3857000	usd
CY2022	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	4766000	usd
CY2021	us-gaap	Insurance Services Revenue InsuranceServicesRevenue	5019000	usd
CY2023	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	2482000	usd
CY2023	us-gaap	Dividends Common Stock DividendsCommonStock	35863000	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	910480000	usd
CY2023	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>Use of Estimates</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.</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;margin:0pt;"></p>
CY2023	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	7424000	usd
CY2022	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	4711000	usd
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	3886000	usd
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	8054000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	6246000	usd
CY2023	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	pure
CY2023	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	21412000	usd
CY2022	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	20651000	usd
CY2021	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	20160000	usd
CY2023	us-gaap	Tangible Asset Impairment Charges TangibleAssetImpairmentCharges	0	usd
CY2022	us-gaap	Tangible Asset Impairment Charges TangibleAssetImpairmentCharges	0	usd
CY2021	us-gaap	Tangible Asset Impairment Charges TangibleAssetImpairmentCharges	4497000	usd
CY2023Q4	us-gaap	Contract With Customer Refund Liability ContractWithCustomerRefundLiability	6376000	usd
CY2022Q4	us-gaap	Contract With Customer Refund Liability ContractWithCustomerRefundLiability	6207000	usd
CY2023Q4	us-gaap	Continuing Care Retirement Communities Advance Fees Obligation For Future Services Amount ContinuingCareRetirementCommunitiesAdvanceFeesObligationForFutureServicesAmount	1606000	usd
CY2022Q4	us-gaap	Continuing Care Retirement Communities Advance Fees Obligation For Future Services Amount ContinuingCareRetirementCommunitiesAdvanceFeesObligationForFutureServicesAmount	2218000	usd
CY2023	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<p style="font-family:Times New Roman;font-size:10pt;font-variant:normal;text-align:justify;margin:0pt;"><i>Concentration of Credit Risks</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;">Our credit risks primarily relate to cash and cash equivalents, restricted cash and cash equivalents, accounts receivable, marketable securities, restricted marketable securities and notes receivable. Cash and cash equivalents are primarily held in bank accounts and overnight investments. Restricted cash and cash equivalents are primarily invested in commercial paper and certificates of deposit with financial institutions and other interest-bearing accounts. Accounts receivable consist primarily of amounts due from patients (funded through Medicare, Medicaid, other contractual programs and through private payors) and from other health care companies for management, accounting and other services. We perform continual credit evaluations of our clients and maintain appropriate allowances for doubtful accounts on any accounts receivable proving uncollectible, and continually monitor and adjust these allowances as necessary. Marketable securities and restricted marketable securities are held primarily in accounts with brokerage institutions. Notes receivable relate primarily to secured loans with health care facilities.</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;">At any point in time we have funds in our operating accounts and restricted cash accounts that are with <em style="font: inherit;">third</em> party financial institutions. These balances in the U.S. <em style="font: inherit;"> may </em>exceed the Federal Deposit Insurance Corporation (“FDIC”) insurance limits. While we monitor the cash balances in our operating accounts, these cash and restricted cash balances could be impacted if the underlying financial institutions fail or could be subject to other adverse conditions in the financial markets.</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;">Our financial instruments, principally our notes receivable, are subject to the possibility of loss of the carrying values as a result of the failure of other parties to perform according to their contractual obligations. We obtain various collateral and other protective rights, and continually monitor these rights in order to reduce such possibilities of credit loss. We evaluate the need to provide reserves for potential credit losses on our financial instruments based on management's periodic review of the portfolio on an instrument-by-instrument basis.</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;"></p>
CY2023	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	1087614000	usd
CY2022	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	1029085000	usd
CY2021	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	965542000	usd
CY2023	nhc	Revenue From Contract With Customer Including Assessed Tax Percentage RevenueFromContractWithCustomerIncludingAssessedTaxPercentage	1	pure
CY2022	nhc	Revenue From Contract With Customer Including Assessed Tax Percentage RevenueFromContractWithCustomerIncludingAssessedTaxPercentage	1	pure
CY2021	nhc	Revenue From Contract With Customer Including Assessed Tax Percentage RevenueFromContractWithCustomerIncludingAssessedTaxPercentage	1	pure
CY2023	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	23926000	usd
CY2022	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	23451000	usd
CY2021	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	22717000	usd
CY2023	nhc	Management And Accounting Services Fees Revenue ManagementAndAccountingServicesFeesRevenue	18544000	usd
CY2022	nhc	Management And Accounting Services Fees Revenue ManagementAndAccountingServicesFeesRevenue	16160000	usd
CY2023	nhc	Miscellaneous Revenue MiscellaneousRevenue	1373000	usd
CY2022	nhc	Miscellaneous Revenue MiscellaneousRevenue	819000	usd
CY2021	nhc	Miscellaneous Revenue MiscellaneousRevenue	525000	usd
CY2023	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	6230000	usd
CY2022	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	0	usd
CY2021	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	0	usd
CY2023	nhc	Other Revenues OtherRevenues	53930000	usd
CY2022	nhc	Other Revenues OtherRevenues	45196000	usd
CY2021	nhc	Other Revenues OtherRevenues	45400000	usd
CY2023	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	22928000	usd
CY2022	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	23039000	usd
CY2021	us-gaap	Operating Lease Lease Income Lease Payments OperatingLeaseLeaseIncomeLeasePayments	22609000	usd
CY2023	nhc	Operating Lease Variable Lease Income Expense OperatingLeaseVariableLeaseIncomeExpense	998000	usd
CY2022	nhc	Operating Lease Variable Lease Income Expense OperatingLeaseVariableLeaseIncomeExpense	412000	usd
CY2021	nhc	Operating Lease Variable Lease Income Expense OperatingLeaseVariableLeaseIncomeExpense	108000	usd
CY2023	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	23926000	usd
CY2022	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	23451000	usd
CY2021	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	22717000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	22933000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	22824000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	20314000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	73000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received Five Years LessorOperatingLeasePaymentsToBeReceivedFiveYears	6000	usd
CY2023Q4	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	66150000	usd
CY2022	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	477000	usd
CY2021	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	5111000	usd
CY2023	nhc	Dividends And Other Net Realized Gains And Losses On Sales Of Securities DividendsAndOtherNetRealizedGainsAndLossesOnSalesOfSecurities	6262000	usd
CY2022	nhc	Dividends And Other Net Realized Gains And Losses On Sales Of Securities DividendsAndOtherNetRealizedGainsAndLossesOnSalesOfSecurities	5530000	usd
CY2021	nhc	Dividends And Other Net Realized Gains And Losses On Sales Of Securities DividendsAndOtherNetRealizedGainsAndLossesOnSalesOfSecurities	7998000	usd
CY2023	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	8383000	usd
CY2022	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	5134000	usd
CY2021	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	4665000	usd
CY2023	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	16660000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	11141000	usd
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	17774000	usd
CY2023	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	1087614000	usd
CY2023	nhc	Other Revenues OtherRevenues	53930000	usd
CY2023	us-gaap	Revenues Revenues	1141544000	usd
CY2023	us-gaap	Labor And Related Expense LaborAndRelatedExpense	712344000	usd
CY2023	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	288183000	usd
CY2023	us-gaap	Operating Lease Expense OperatingLeaseExpense	41525000	usd
CY2023	us-gaap	Depreciation And Amortization DepreciationAndAmortization	42034000	usd
CY2023	us-gaap	Interest Expense InterestExpense	324000	usd
CY2023	us-gaap	Costs And Expenses CostsAndExpenses	1084410000	usd
CY2023	us-gaap	Operating Income Loss OperatingIncomeLoss	57134000	usd
CY2023	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	16660000	usd
CY2023	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	14944000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	88738000	usd
CY2022	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	1029085000	usd
CY2022	nhc	Other Revenues OtherRevenues	45196000	usd
CY2022	nhc	Government Assistance Stimulus Income Cares Act GovernmentAssistanceStimulusIncomeCaresAct	11457000	usd
CY2022	us-gaap	Revenues Revenues	1085738000	usd
CY2022	us-gaap	Labor And Related Expense LaborAndRelatedExpense	686169000	usd
CY2022	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	289372000	usd
CY2022	us-gaap	Operating Lease Expense OperatingLeaseExpense	40977000	usd
CY2022	us-gaap	Depreciation And Amortization DepreciationAndAmortization	40489000	usd
CY2022	us-gaap	Interest Expense InterestExpense	563000	usd
CY2022	nhc	Asset Impairment Charges Recoveries AssetImpairmentChargesRecoveries	3728000	usd
CY2022	us-gaap	Costs And Expenses CostsAndExpenses	1053842000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	31896000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	11141000	usd
CY2022	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-15806000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	27231000	usd
CY2021	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	965542000	usd
CY2021	nhc	Other Revenues OtherRevenues	45400000	usd
CY2021	nhc	Government Assistance Stimulus Income Cares Act GovernmentAssistanceStimulusIncomeCaresAct	63360000	usd
CY2021	us-gaap	Revenues Revenues	1074302000	usd
CY2021	us-gaap	Labor And Related Expense LaborAndRelatedExpense	666063000	usd
CY2021	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	266754000	usd
CY2021	us-gaap	Operating Lease Expense OperatingLeaseExpense	40818000	usd
CY2021	us-gaap	Depreciation And Amortization DepreciationAndAmortization	40672000	usd
CY2021	us-gaap	Interest Expense InterestExpense	845000	usd
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	8225000	usd
CY2021	us-gaap	Costs And Expenses CostsAndExpenses	1023377000	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	50925000	usd
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	17774000	usd
CY2021	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Remeasurement Gain BusinessCombinationStepAcquisitionEquityInterestInAcquireeRemeasurementGain	95202000	usd
CY2021	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-13863000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	150038000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	94201000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	120521000	usd
CY2023Q4	nhc	Lease Rightofuse Asset LeaseRightofuseAsset	94848000	usd
CY2022Q4	nhc	Lease Rightofuse Asset LeaseRightofuseAsset	125050000	usd
CY2023Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	860000	usd
CY2022Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	4985000	usd
CY2023Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	29352000	usd
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	29075000	usd
CY2022Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	860000	usd
CY2023Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	63175000	usd
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	91016000	usd
CY2023Q4	nhc	Lease Liability LeaseLiability	93387000	usd
CY2022Q4	nhc	Lease Liability LeaseLiability	125936000	usd
CY2023Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P0Y2M12D
CY2022Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P1Y2M12D
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P3Y
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y
CY2023Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.06	pure
CY2022Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.06	pure
CY2023Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.066	pure
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.066	pure
CY2023	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	3882000	usd
CY2022	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	3878000	usd
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	3905000	usd
CY2023	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	215000	usd
CY2022	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	534000	usd
CY2021	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	807000	usd
CY2023	nhc	Finance Lease Cost FinanceLeaseCost	4097000	usd
CY2022	nhc	Finance Lease Cost FinanceLeaseCost	4412000	usd
CY2021	nhc	Finance Lease Cost FinanceLeaseCost	4712000	usd
CY2023	us-gaap	Operating Lease Cost OperatingLeaseCost	34953000	usd
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	36051000	usd
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	36079000	usd
CY2023	us-gaap	Variable Lease Cost VariableLeaseCost	5549000	usd
CY2022	us-gaap	Variable Lease Cost VariableLeaseCost	3887000	usd
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	3721000	usd
CY2023	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1023000	usd
CY2022	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1039000	usd
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1018000	usd
CY2023	nhc	Total Operating Lease Cost TotalOperatingLeaseCost	41525000	usd
CY2022	nhc	Total Operating Lease Cost TotalOperatingLeaseCost	40977000	usd
CY2021	nhc	Total Operating Lease Cost TotalOperatingLeaseCost	40818000	usd
CY2023	us-gaap	Lease Cost LeaseCost	45622000	usd
CY2022	us-gaap	Lease Cost LeaseCost	45389000	usd
CY2021	us-gaap	Lease Cost LeaseCost	45530000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	867000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	34442000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	33645000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	0	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	32955000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	0	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	496000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	0	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	198000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	0	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	32000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	867000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	101768000	usd
CY2023Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	7000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	9241000	usd
CY2023Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	860000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	92527000	usd
CY2023Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	860000	usd
CY2023Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	29352000	usd
CY2023Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	0	usd
CY2023Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	63175000	usd
CY2023	us-gaap	Operating Lease Payments OperatingLeasePayments	36198000	usd
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	36051000	usd
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	36079000	usd
CY2023	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	215000	usd
CY2022	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	534000	usd
CY2021	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	807000	usd
CY2023	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	4985000	usd
CY2022	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	4695000	usd
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	4423000	usd
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15310142
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15410222
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15347129
CY2023	us-gaap	Net Income Loss NetIncomeLoss	66798000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	22445000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	138590000	usd
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.36
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.46
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	9.03
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15310142
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15410222
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	15347129
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	15377343
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	15447211
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	15416716
CY2023	us-gaap	Net Income Loss NetIncomeLoss	66798000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	22445000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	138590000	usd
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.34
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.45
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	8.99
CY2023Q4	nhc	Marketable Securities Availableforsale Amortized Cost MarketableSecuritiesAvailableforsaleAmortizedCost	189648000	usd
CY2023Q4	us-gaap	Marketable Securities MarketableSecurities	265623000	usd
CY2022Q4	nhc	Marketable Securities Availableforsale Amortized Cost MarketableSecuritiesAvailableforsaleAmortizedCost	208211000	usd
CY2022Q4	us-gaap	Marketable Securities MarketableSecurities	265791000	usd
CY2023Q4	us-gaap	Investment Owned Balance Shares InvestmentOwnedBalanceShares	1630642
CY2023Q4	us-gaap	Equity Securities Fv Ni Cost EquitySecuritiesFvNiCost	24734000	usd
CY2022Q4	us-gaap	Investment Owned Balance Shares InvestmentOwnedBalanceShares	1630642
CY2022Q4	us-gaap	Equity Securities Fv Ni Cost EquitySecuritiesFvNiCost	24734000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	19664000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	19328000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	33662000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	33037000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	81517000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	77118000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	81500000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	76394000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	33515000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	30802000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	38547000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	33216000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	642000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	479000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	0	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	0	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	135338000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	127727000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	153709000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	142647000	usd
CY2023Q4	nhc	Equity Securities Fv Ni Gross Unrealized Gain EquitySecuritiesFvNiGrossUnrealizedGain	84514000	usd
CY2022Q4	nhc	Equity Securities Fv Ni Gross Unrealized Gain EquitySecuritiesFvNiGrossUnrealizedGain	71869000	usd
CY2023Q4	nhc	Equity Securities Fv Ni Gross Unrealized Loss EquitySecuritiesFvNiGrossUnrealizedLoss	928000	usd
CY2022Q4	nhc	Equity Securities Fv Ni Gross Unrealized Loss EquitySecuritiesFvNiGrossUnrealizedLoss	3227000	usd
CY2023	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	14944000	usd
CY2022	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-15806000	usd
CY2021	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-13863000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	326000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	9000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	7937000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	11071000	usd
CY2023	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	47396000	usd
CY2022	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	49961000	usd
CY2021	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	101920000	usd
CY2023	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	-667000	usd
CY2022	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	-1326000	usd
CY2021	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	1042000	usd
CY2023Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	391591000	usd
CY2023Q4	us-gaap	Land Land	65579000	usd
CY2022Q4	us-gaap	Land Land	67165000	usd
CY2023Q4	us-gaap	Leasehold Improvements Gross LeaseholdImprovementsGross	129801000	usd
CY2022Q4	us-gaap	Leasehold Improvements Gross LeaseholdImprovementsGross	125142000	usd
CY2023Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	700044000	usd
CY2022Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	688433000	usd
CY2023Q4	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	195159000	usd
CY2022Q4	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	187743000	usd
CY2023Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	11098000	usd
CY2022Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	12736000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1101681000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1081219000	usd
CY2023Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	608352000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	574687000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	493329000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	506532000	usd
CY2023	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0	usd
CY2022Q4	us-gaap	Goodwill Goodwill	168295000	usd
CY2023	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	usd
CY2023Q4	us-gaap	Goodwill Goodwill	168295000	usd
CY2023	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	usd
CY2023Q4	us-gaap	Goodwill Goodwill	168295000	usd
CY2023	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	14520000	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	717000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	15072000	usd
CY2023	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3137000	usd
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	251000	usd
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1164000	usd
CY2023	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	17657000	usd
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	968000	usd
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	16236000	usd
CY2023	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	4142000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	4595000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-3866000	usd
CY2023	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	1651000	usd
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	1691000	usd
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1419000	usd
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	5793000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	6286000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-5285000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	23450000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7254000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10951000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReserves	1898000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReserves	2209000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	7346000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	6441000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Other DeferredTaxAssetsTaxDeferredExpenseOther	5653000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Other DeferredTaxAssetsTaxDeferredExpenseOther	5505000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	931000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	742000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	4987000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	3393000	usd
CY2023Q4	nhc	Deferred Tax Assets Operating Lease Liabilities DeferredTaxAssetsOperatingLeaseLiabilities	23658000	usd
CY2022Q4	nhc	Deferred Tax Assets Operating Lease Liabilities DeferredTaxAssetsOperatingLeaseLiabilities	30558000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	567000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1711000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	45040000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	50559000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	594000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	978000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	44446000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	49581000	usd
CY2023Q4	nhc	Deferred Tax Liabilities Unrealized Gains On Marketable Securities DeferredTaxLiabilitiesUnrealizedGainsOnMarketableSecurities	19971000	usd
CY2022Q4	nhc	Deferred Tax Liabilities Unrealized Gains On Marketable Securities DeferredTaxLiabilitiesUnrealizedGainsOnMarketableSecurities	15396000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	2055000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	2045000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	3387000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	3063000	usd
CY2023Q4	nhc	Deferred Tax Liabilities Book Basis In Excess Of Tax Basis Of Securities DeferredTaxLiabilitiesBookBasisInExcessOfTaxBasisOfSecurities	3393000	usd
CY2022Q4	nhc	Deferred Tax Liabilities Book Basis In Excess Of Tax Basis Of Securities DeferredTaxLiabilitiesBookBasisInExcessOfTaxBasisOfSecurities	3164000	usd
CY2023Q4	nhc	Deferred Tax Liabilities Long Term Investments DeferredTaxLiabilitiesLongTermInvestments	8753000	usd
CY2022Q4	nhc	Deferred Tax Liabilities Long Term Investments DeferredTaxLiabilitiesLongTermInvestments	6155000	usd
CY2023Q4	nhc	Deferred Tax Liabilities Operating Lease Assets DeferredTaxLiabilitiesOperatingLeaseAssets	24087000	usd
CY2022Q4	nhc	Deferred Tax Liabilities Operating Lease Assets DeferredTaxLiabilitiesOperatingLeaseAssets	30667000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	61646000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	60490000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	17200000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	10909000	usd
CY2023	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	18635000	usd
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	5719000	usd
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	31508000	usd
CY2023	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	4600000	usd
CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1034000	usd
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1113000	usd
CY2023	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	-0	usd
CY2022	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	-0	usd
CY2021	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	19758000	usd
CY2023	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	1227000	usd
CY2022	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	730000	usd
CY2021	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	-158000	usd
CY2023	nhc	Income Tax Reconciliation Expiration Of Statute Of Limitations IncomeTaxReconciliationExpirationOfStatuteOfLimitations	1491000	usd
CY2022	nhc	Income Tax Reconciliation Expiration Of Statute Of Limitations IncomeTaxReconciliationExpirationOfStatuteOfLimitations	1032000	usd
CY2021	nhc	Income Tax Reconciliation Expiration Of Statute Of Limitations IncomeTaxReconciliationExpirationOfStatuteOfLimitations	1901000	usd
CY2023	us-gaap	Income Tax Reconciliation Minority Interest Income Expense IncomeTaxReconciliationMinorityInterestIncomeExpense	317000	usd
CY2022	us-gaap	Income Tax Reconciliation Minority Interest Income Expense IncomeTaxReconciliationMinorityInterestIncomeExpense	518000	usd
CY2021	us-gaap	Income Tax Reconciliation Minority Interest Income Expense IncomeTaxReconciliationMinorityInterestIncomeExpense	-104000	usd
CY2023	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	162000	usd
CY2022	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	285000	usd
CY2021	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	251000	usd
CY2023	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	4815000	usd
CY2022	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	1535000	usd
CY2021	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	-20557000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	23450000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7254000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10951000	usd
CY2023Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	4149000	usd
CY2023Q4	us-gaap	Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Amount Of Unrecorded Benefit SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleAmountOfUnrecordedBenefit	1102000	usd
CY2023	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2769000	usd
CY2022	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	583000	usd
CY2021	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2844000	usd
CY2023Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	3351000	usd
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0452	pure
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0183	pure
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0021	pure
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.293	pure
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.314	pure
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.349	pure
CY2023	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P2Y10M24D
CY2022	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P2Y10M24D
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P2Y2M12D
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0441	pure
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0357	pure
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.03	pure
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CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	71.39
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	6000
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	72.94
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	374926
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	72.95
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	302266
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CY2022	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	64.49
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	199451
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	75.98
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	445144
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	66.62
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	299278
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CY2023	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	103481
CY2023	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	64.72
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	52407
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	60.58
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CY2023	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Upper Range Limit ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit	61.3
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CY2022Q4	us-gaap	Self Insurance Reserve SelfInsuranceReserve	102469000	usd
CY2023	dei	Auditor Firm AuditorFirmId	42

Files In Submission

Name	View Source	Status
0001437749-24-004619-index-headers.html	Edgar Link	pending
0001437749-24-004619-index.html	Edgar Link	pending
0001437749-24-004619.txt	Edgar Link	pending
0001437749-24-004619-xbrl.zip	Edgar Link	pending
ex_620082.htm	Edgar Link	pending
ex_620083.htm	Edgar Link	pending
ex_620084.htm	Edgar Link	pending
ex_620085.htm	Edgar Link	pending
ex_620086.htm	Edgar Link	pending
ex_620087.htm	Edgar Link	pending
ex_620088.htm	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
grph02.jpg	Edgar Link	pending
img01.jpg	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
nhc-20231231.xsd	Edgar Link	pending
nhc20231231_10k.htm	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
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R46.htm	Edgar Link	pending
nhc-20231231_cal.xml	Edgar Link	unprocessable
nhc-20231231_def.xml	Edgar Link	unprocessable
nhc-20231231_lab.xml	Edgar Link	unprocessable
nhc-20231231_pre.xml	Edgar Link	unprocessable
nhc20231231_10k_htm.xml	Edgar Link	completed
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R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable

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$NHC
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2024 Q1 Form 10-K Financial Statement

#000143774924004619 Filed on February 16, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NHC NATIONAL HEALTHCARE CORP Stock $nhc

2024 Q1 Form 10-K Financial Statement

#000143774924004619 Filed on February 16, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$NHC
NATIONAL HEALTHCARE CORP Stock $nhc