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Commitments And Contingencies Commitments and Contingencies (Schedule of Lease Commitments) (Details) | Sep. 30, 2019 USD ($)
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Maximum Commitment For All Active Development Projects | $ 46,680,000
Development in Process | (28,845,000)
Remaining Unfunded Development Commitment | 17,835,000
Development Commitment [Member] | Ignite Medical Resorts [Member] |
Maximum Commitment For All Active Development Projects | 25,350,000
Development in Process | (13,255,000)
Remaining Unfunded Development Commitment | 12,095,000
Development Commitment [Member] | Senior Living Communities [Member] |
Maximum Commitment For All Active Development Projects | 3,100,000
Development in Process | (2,000,000)
Remaining Unfunded Development Commitment | 1,100,000
Development Commitment [Member] | Wingate Healthcare [Member] |
Maximum Commitment For All Active Development Projects | 1,900,000
Development in Process | (212,000)
Remaining Unfunded Development Commitment | 1,688,000
Development Commitment [Member] | Navion Senior Solutions [Member] |
Maximum Commitment For All Active Development Projects | 650,000
Development in Process | 0
Remaining Unfunded Development Commitment | 650,000
Capital Improvement Commitment [Member] | Woodland Village [Member] |
Maximum Commitment For All Active Development Projects | 7,450,000
Development in Process | (7,374,000)
Remaining Unfunded Development Commitment | 76,000
Capital Improvement Commitment [Member] | Senior Living Communities [Member] |
Maximum Commitment For All Active Development Projects | 6,830,000
Development in Process | (6,004,000)
Remaining Unfunded Development Commitment | 826,000
Capital Improvement Commitment [Member] | Discovery Senior Living [Member] |
Maximum Commitment For All Active Development Projects | 1,400,000
Development in Process | 0
Remaining Unfunded Development Commitment | $ 1,400,000

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- Definition This item represents the maximum commitment for all active development projects. + References No definition available. + Details
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Namespace Prefix: | nhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition This item represents the remaining unfunded development commitment related to a lease property. + References No definition available. + Details
Name: | nhi_RemainingUnfundedDevelopmentCommitment
Namespace Prefix: | nhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The current amount of expenditures for a real estate project that has not yet been completed. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.10) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 + Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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