XML 42 R32.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Significant Accounting Policies Significant Accounting Policies (Details) | Jun. 30, 2018
--- | ---
Accounting Policies [Abstract] |
Variable Interest Entity Number Of Entities Not Primary Beneficiary | 8

X
- Definition Number of Variable Interest Entities (VIE) or potential VIEs for which it is determined that the reporting entity is not the primary beneficiary. + References No definition available. + Details
Name: | nhi_VariableInterestEntityNumberOfEntitiesNotPrimaryBeneficiary
Namespace Prefix: | nhi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration