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

Noncontrolling Interest, Equity Acquired, Percentage

+ References

No definition available.

+ Details

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

- Definition

Related Parties, Properties in Lease Termination Agreement

+ References

No definition available.

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

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

- 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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 275
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482861/275-10-50-2

+ Details

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

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=nhi_SixSeniorHousingPropertiesMember
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:	srt_OwnershipAxis=nhi_PreferredEquityInterestMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

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

Noncontrolling Interests - Narrative (Details) - property		6 Months Ended
	Aug. 01, 2025	Jun. 30, 2026
Six Senior Housing Properties
Noncontrolling Interest [Line Items]
Properties in lease termination agreement	6
Equity acquired (as a percent)	2.00%
Merrill Gardens Managed Portfolio
Noncontrolling Interest [Line Items]
Interest in joint venture percentage		20.00%
Merrill Gardens Managed Portfolio \| Preferred Equity Interest
Noncontrolling Interest [Line Items]
Ownership percentage		100.00%
Merrill Gardens Managed Portfolio \| Common Equity Interest
Noncontrolling Interest [Line Items]
Ownership percentage of noncontrolling owner		80.00%
LCS Timber Ridge \| Common Equity Interest \| LCS Timber Ridge
Noncontrolling Interest [Line Items]
Ownership percentage		80.00%
Ownership percentage of noncontrolling owner		20.00%
Discovery Managed Portfolio
Noncontrolling Interest [Line Items]
Common equity interest in venture (as percent)		2.00%
Discovery Managed Portfolio \| Preferred Equity Interest
Noncontrolling Interest [Line Items]
Ownership percentage		100.00%
Discovery Managed Portfolio \| Common Equity Interest
Noncontrolling Interest [Line Items]
Ownership percentage	98.00%	98.00%
ILFS
Noncontrolling Interest [Line Items]
Number of real estate properties		3
ILFS \| Merrill Gardens Managed Portfolio
Noncontrolling Interest [Line Items]
Number of real estate properties		6
ILFS \| Discovery Managed Portfolio
Noncontrolling Interest [Line Items]
Number of real estate properties		10