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v3.19.1

Commitments And Contingencies (Details) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 USD ($) properties | Dec. 31, 2018 USD ($)
Incentive to Lessee | $ 8,538 | $ 7,456
Number of Real Estate Properties | properties | 220 |
Bickford Development Properties [Member] |  |
Developer Incentive Payments | $ 250,000 |
Incentive to Lessee | $ 1,750,000 |
Number Of Development Projects Active | properties | 5 |

X
- Definition This item represents contingent payments to developers which are an incentive to complete a construction project within the scheduled project time frame. + References No definition available. + Details
Name: | nhi_DeveloperIncentivePayments
Namespace Prefix: | nhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition This item represents the number of active development or construction projects. + References No definition available. + Details
Name: | nhi_NumberOfDevelopmentProjectsActive
Namespace Prefix: | nhi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition This item represents the deferred charge for an incentive or inducement granted by a lessor to a lessee, in order to motivate the lessee to enter the lease agreement, which incentive or inducement is to be recognized as a reduction of rental revenue over the lease term. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=77902458&loc=d3e40019-112707 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=77902458&loc=d3e40010-112707 + Details
Name: | us-gaap_IncentiveToLessee
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- 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

X
- Details
Name: | invest_InvestmentAxis=nhi_BickfordDevelopmentPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |