Equity Method Investment, Increase in Ownership Percent

No definition available.

Name:	nhi_EquityMethodInvestmentIncreaseInOwnershipPercent
Namespace Prefix:	nhi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Interest in Joint Venture Percentage

+ References

No definition available.

+ Details

Name:	nhi_InterestInJointVenturePercentage
Namespace Prefix:	nhi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Management Fee, Multiplier For Calculation of Fees

+ References

No definition available.

+ Details

Name:	nhi_ManagementFeeMultiplierForCalculationOfFees
Namespace Prefix:	nhi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number of Joint Ventures

+ References

No definition available.

+ Details

Name:	nhi_NumberOfJointVentures
Namespace Prefix:	nhi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Real Estate Services Fee, Percent Fee

+ References

No definition available.

+ Details

Name:	nhi_RealEstateServicesFeePercentFee
Namespace Prefix:	nhi_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Senior Housing Operating Portfolio Formation Activities [Line Items]

+ References

No definition available.

+ Details

Name:	nhi_SeniorHousingOperatingPortfolioFormationActivitiesLineItems
Namespace Prefix:	nhi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfRealEstateProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow associated with the investment in or advances to an entity in which the reporting entity shares control of the entity with another party or group.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-13

+ Details

Name:	us-gaap_PaymentsToAcquireInterestInJointVenture
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The percentage charged for managing real estate properties.

+ References

No definition available.

+ Details

Name:	us-gaap_PropertyManagementFeePercentFee
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=nhi_MerrillMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=nhi_MerrillGardensManagedPortfolioMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=nhi_DiscoveryManagedPortfolioMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=nhi_SeniorHousingOperatingPortfolioMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=nhi_NewVentureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=nhi_IndependentLivingFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Senior Housing Operating Portfolio Structure (Details)	3 Months Ended		9 Months Ended
Senior Housing Operating Portfolio Structure (Details)	Dec. 31, 2024 USD ($)	Jun. 30, 2024 USD ($)	Sep. 30, 2024 USD ($) property jointVenture
Senior Housing Operating Portfolio Formation Activities [Line Items]
Cash contributed for its common equity interest in the venture		$ 100,000
Forecast \| Merrill
Senior Housing Operating Portfolio Formation Activities [Line Items]
Cash contributed for its common equity interest in the venture	$ 1,100,000
Minimum
Senior Housing Operating Portfolio Formation Activities [Line Items]
Management fee multiplier			$ 1,000
Merrill Gardens Managed Portfolio
Senior Housing Operating Portfolio Formation Activities [Line Items]
Interest in joint venture percentage			20.00%
Management fee			5.00%
Real estate services fee			5.00%
Merrill Gardens Managed Portfolio \| Forecast
Senior Housing Operating Portfolio Formation Activities [Line Items]
Cash contributed for its common equity interest in the venture	$ 5,500,000
Discovery Managed Portfolio
Senior Housing Operating Portfolio Formation Activities [Line Items]
Management fee			5.00%
Common equity interest in venture			2.00%
Cash contributed for its common equity interest in the venture		$ 3,500,000
SHOP \| New Venture
Senior Housing Operating Portfolio Formation Activities [Line Items]
Ownership percentage			100.00%
Independent Living Facility
Senior Housing Operating Portfolio Formation Activities [Line Items]
Number of joint ventures \| jointVenture			2
Properties \| property			3
Independent Living Facility \| Merrill Gardens Managed Portfolio
Senior Housing Operating Portfolio Formation Activities [Line Items]
Properties \| property			6
Independent Living Facility \| Discovery Managed Portfolio
Senior Housing Operating Portfolio Formation Activities [Line Items]
Properties \| property			9
Independent Living Facility \| SHOP
Senior Housing Operating Portfolio Formation Activities [Line Items]
Properties \| property			15