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Commitments And Contingencies Commitments and Contingencies (Schedule of Lease Commitments) (Details) $ in Thousands | 6 Months Ended
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Jun. 30, 2018 USD ($)
Maximum Commitment For All Active Development Projects | $ 28,579
Construction and Development Costs | (15,581)
Remaining Unfunded Development Commitment | 12,998
Capital Improvement Commitment [Member] | EL FW Intermediary I, LLC [Member] |
Maximum Commitment For All Active Development Projects | 8,937
Construction and Development Costs | (8,937)
Remaining Unfunded Development Commitment | 0
Capital Improvement Commitment [Member] | Bickford Senior Living [Member] |
Maximum Commitment For All Active Development Projects | 4,150
Construction and Development Costs | (1,647)
Remaining Unfunded Development Commitment | 2,503
Capital Improvement Commitment [Member] | Senior Living Communities [Member] |
Maximum Commitment For All Active Development Projects | 6,830
Construction and Development Costs | (2,185)
Remaining Unfunded Development Commitment | 4,645
Capital Improvement Commitment [Member] | Discovery Senior Living [Member] |
Maximum Commitment For All Active Development Projects | 500
Construction and Development Costs | 0
Remaining Unfunded Development Commitment | 500
Capital Improvement Commitment [Member] | Village Concepts [Member] |
Maximum Commitment For All Active Development Projects | 7,450
Construction and Development Costs | (2,750)
Remaining Unfunded Development Commitment | 4,700
Development Commitment [Member] | Chancellor Healthcare [Member] |
Maximum Commitment For All Active Development Projects | 62
Construction and Development Costs | (62)
Remaining Unfunded Development Commitment | 0
Development Commitment [Member] | Navion Senior Solutions [Member] |
Maximum Commitment For All Active Development Projects | 650
Construction and Development Costs | 0
Remaining Unfunded Development Commitment | $ 650

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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 aggregate costs related to construction and development services during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Details
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Balance Type: |
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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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- Details
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Period Type: |