XML 69 R59.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Subsequent Events Subsequent Events (Narrative) (Details) | 1 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | ---
Apr. 29, 2018 USD ($) | Mar. 31, 2018 USD ($) properties | Mar. 31, 2017 USD ($) | Apr. 30, 2018 USD ($) properties beds_or_units | Dec. 31, 2017 properties
Subsequent Event [Line Items] |  |  |  |  |
Number of Real Estate Properties | properties |  |  |  |  | 210
Payments to Acquire Real Estate |  | $ 14,404,000 | $ 118,011,000 |  |
Bickford Senior Living [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Number of Real Estate Properties | properties |  | 47 |  |  |
Bickford Senior Living [Member] | Subsequent Event [Member] |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |
Number of Real Estate Properties | properties |  |  |  | 5 |
Payments to Acquire Real Estate | $ 69,750,000 |  |  |  |
Initial lease rate |  |  |  | 6.85% |
Lessor, Operating Lease, Term of Contract | 15 years |  |  |  |
Number of Units in Real Estate Property | beds_or_units |  |  |  | 320 |
Asset Purchase Transaction Costs | $ 500,000 |  |  |  |
Capital Improvements Commitment |  |  |  | $ 1,750,000 |

X
- Definition Asset Purchase Transaction Costs + References No definition available. + Details
Name: | nhi_AssetPurchaseTransactionCosts
Namespace Prefix: | nhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition This element represents the total amount of capital improvements that an entity has committed to complete. + References No definition available. + Details
Name: | nhi_CapitalImprovementsCommitment
Namespace Prefix: | nhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The initial rate charged under a lease entered into in connection with the purchase of a property. + References No definition available. + Details
Name: | nhi_InitialLeaseRate
Namespace Prefix: | nhi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Term of the lessor's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_LessorLeasingArrangementsOperatingLeasesTermOfContract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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
- Definition The number of units in a real estate property owned as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfUnitsInRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash outflow from the acquisition of a piece of land, anything permanently fixed to it, including buildings, structures on it and so forth; includes real estate intended to generate income for the owner; excludes real estate acquired for use by the owner. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
Name: | us-gaap_PaymentsToAcquireRealEstate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_MajorCustomersAxis=nhi_BickfordSeniorLivingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |