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Investment Activity (Held for Sale Schedule) (Details) $ in Thousands | Dec. 31, 2023 USD ($) property | Dec. 31, 2022 USD ($) property
--- | --- | ---
Real Estate [Abstract] |  |
Number of facilities | property | 1 | 13
Real estate, net | $ | $ 5,004 | $ 43,302

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- Definition Number Of Real Estate Properties, Classified As Held For Sale + References No definition available. + Details
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Namespace Prefix: | nhi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Amount of assets held-for-sale that are not part of a disposal group. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 15 -Paragraph 4 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482309/360-10-15-4 + Details
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Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_RealEstateAbstract
Namespace Prefix: | us-gaap_
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