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Real Estate (Narrative) (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2017 USD ($) a properties Master_Leases renewalOptions beds_or_units shares | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Sep. 30, 2016 | Dec. 31, 2014 USD ($)
Remaining Unfunded Development Commitment | $ 63,943,000 |  |  |  |
Number of Real Estate Properties | properties | 209 |  |  |  |
Number of States in which Entity Operates | 32 |  |  |  |
Payments to Acquire Real Estate | $ 157,214,000 | $ 359,257,000 | $ 106,315,000 |  |
Lessee Payment To Acquire Purchase Option | 1,250,000 | 0 | 0 |  |
Gains (Losses) on Sales of Investment Real Estate | 50,000 | 4,582,000 | 1,126,000 |  |
Noncash or Part Noncash Acquisition, Value of Liabilities Assumed | 1,855,000 | 430,000 | 1,076,000 |  |
Nonportfolio Assets, Original Cost | 1,298,000 |  |  |  |
Real Estate Investment Property, Portfolio Assets | $ 2,664,605,000 |  |  |  |
Number of Lessees | 27 |  |  |  |
Operating Leases, Income Statement, Lease Revenue | $ 265,127,000 | 232,353,000 | 214,407,000 |  |
Mortgage Loans on Real Estate | 98,110,000 | 99,179,000 | 101,124,000 |  | $ 34,850,000
Deferred Rent Receivables, Net | 97,359,000 | 72,518,000 |  |  |
Amortization of Lease Incentives | 119,000 | 40,000 | 40,000 |  |
Straight Line Rent | 26,090,000 | 22,198,000 | 24,623,000 |  |
Construction in Progress, Gross | 2,678,000 | 15,729,000 |  |  |
Maximum Commitment For All Active Development Projects | 88,380,000 |  |  |  |
Equity Method Investment, Ownership Percentage |  |  |  | 85.00% |
Evolve Senior Living [Member] |  |  |  |  |
Mortgage Loans on Real Estate | $ 10,000,000 |  |  |  |
Number of Units in Real Estate Property | beds_or_units | 40 |  |  |  |
Note Receivable Interest Rate | 8.00% |  |  |  |
Loan Term | 5 years |  |  |  |
Ensign Group [Member] |  |  |  |  |
Real Estate Properties, Number Acquired | properties | 1 |  |  |  |
Real Estate Properties, Commitment To Purchase | properties | 3 |  |  |  |
Payments to Acquire Real Estate | $ 13,846,000 |  |  |  |
Lessee Payment To Acquire Purchase Option | 1,250,000 |  |  |  |
Real Estate Investments During The Period | $ 15,096,000 |  |  |  |
Lessor, Operating Lease, Term of Contract | 14 years |  |  |  |
Number of Units in Real Estate Property | beds_or_units | 126 |  |  |  |
Initial lease rate | 8.35% |  |  |  |
Acadia Healthcare [Member] |  |  |  |  |
Real Estate Properties, Number Acquired | properties | 1 |  |  |  |
Operating Leases, Income Statement, Lease Revenue | $ 2,537,000 | 2,392,000 |  |  |
Discovery Senior Living [Member] |  |  |  |  |
Real Estate Properties, Number Acquired | properties | 1 |  |  |  |
Number of Units in Real Estate Property | beds_or_units | 200 |  |  |  |
The Lasalle Group [Member] |  |  |  |  |
Real Estate Properties, Number Acquired | properties | 5 |  |  |  |
Real Estate Investments During The Period | $ 61,865,000 |  |  |  |
Asset Purchase Transaction Costs | $ 65,000 |  |  |  |
Lessor, Operating Lease, Term of Contract | 15 years |  |  |  |
Number of Units in Real Estate Property | beds_or_units | 223 |  |  |  |
Lease Escalator Rate, From Lease Year 1 to Lease Year 3 | 3.50% |  |  |  |
Lease Escalator Rate, After Lease Year 3 | 2.50% |  |  |  |
Initial lease rate | 7.00% |  |  |  |
Lease Incentive Commitment Assessed As Not Probable | $ 5,000,000 |  |  |  |
Payments to acquire real estate, seller earnout, contingent, not probable | $ 2,500,000 |  |  |  |
Navion Senior Solutions [Member] |  |  |  |  |
Number of Acquisition Transactions | 2 |  |  |  |
Real Estate Properties, Number Acquired | properties | 3 |  |  |  |
Real Estate Investments During The Period | $ 16,100,000 |  |  |  |
Number of Units in Real Estate Property | beds_or_units | 118 |  |  |  |
Prestige Senior Living [Member] |  |  |  |  |
Real Estate Properties, Number Acquired | properties | 1 |  |  |  |
Payments to Acquire Real Estate | $ 26,200,000 |  |  |  |
Real Estate Investments During The Period | 26,200,000 |  |  |  |
Asset Purchase Transaction Costs | $ 112,000 |  |  |  |
Lessor, Operating Lease, Term of Contract | 12 years |  |  |  |
Number of Units in Real Estate Property | beds_or_units | 102 |  |  |  |
Initial lease rate | 7.00% |  |  |  |
Lease Incentive Commitment Assessed As Not Probable | $ 1,000,000 |  |  |  |
Lease Escalator Rate Lease Year 2 to Lease Year 4 | 3.50% |  |  |  |
Lease Escalator Rate after Lease Year 4 | 2.50% |  |  |  |
Senior Living Communities [Member] |  |  |  |  |
Real Estate Properties, Number Acquired | properties | 1 |  |  |  |
Number of Real Estate Properties | properties | 9 |  |  |  |
Lessor, Operating Lease, Term of Contract | 15 years |  |  |  |
Operating Leases, Income Statement, Lease Revenue | $ 45,735,000 | $ 40,332,000 | $ 39,422,000 |  |
Percentage of Continuing Revenue | 16.00% | 16.00% | 17.00% |  |
Straight Line Rent | $ 6,984,000 | $ 7,369,000 | $ 8,422,000 |  |
Number of Units in Real Estate Property | 1,970 |  |  |  |
Number of additional lease renewal options | 2 |  |  |  |
Lessor, Operating Lease, Renewal Term | 5 years |  |  |  |
Lease Escalator Rate Lease Year 2 to Lease Year 4 | 4.00% |  |  |  |
Lease Escalator Rate after Lease Year 4 | 3.00% |  |  |  |
Bickford Senior Living [Member] |  |  |  |  |
Real Estate Properties, Number Acquired | properties | 1 |  |  |  |
Number of Real Estate Properties | properties | 47 |  |  |  |
Minimum Annual Lease Income | $ 36,504,000 |  |  |  |
Operating Leases, Income Statement, Lease Revenue | $ 41,606,000 | $ 30,732,000 | $ 24,121,000 |  |
Percentage of Continuing Revenue | 15.00% | 12.00% | 11.00% |  |
Straight Line Rent | $ 5,102,000 | $ 858,000 | $ 267,000 |  |
Number of Real Estate Properties To Be Constructed | properties | 2 |  |  |  |
Joint Venture Contributed Properties Ownership Interest Retained |  |  |  | 85.00% |
Joint Venture Contributed Properties Ownership Interest Surrendered | 15.00% |  |  |  |
Straight Line Rent Adjustments | $ 5,102,000 |  |  |  |
Transition Tenant [Member] |  |  |  |  |
Lessor, Operating Lease, Term of Contract | 10 years |  |  |  |
Purchase Option Amount | $ 21,400,000 |  |  |  |
Number of Units in Real Estate Property | beds_or_units | 126 |  |  |  |
Lessor, Operating Lease, Payments to be Received | $ 1,500,000 |  |  |  |
Lease Escalator Rate Lease Year 2 to Lease Year 4 | 4.00% |  |  |  |
Purchase Option, Amount, Forward Rent, Capitalization Rate | 8.50% |  |  |  |
Lease Escalator Rate after Lease Year 4 | 3.00% |  |  |  |
Holiday Acquisition Holdings [Member] |  |  |  |  |
Number of Real Estate Properties | properties | 25 |  |  |  |
Lessor, Operating Lease, Term of Contract | 17 years |  |  |  |
Operating Leases, Income Statement, Lease Revenue | $ 43,817,000 | $ 43,817,000 | $ 43,817,000 |  |
Percentage of Continuing Revenue | 16.00% | 18.00% | 19.00% |  |
Straight Line Rent | $ 7,397,000 | $ 8,965,000 | $ 10,466,000 |  |
Lease Escalator Rate, After Lease Year 3 | 3.50% |  |  |  |
National Healthcare Corporation [Member] |  |  |  |  |
Number of Real Estate Properties | properties | 42 |  |  |  |
Number of Master Leases | Master_Leases | 2 |  |  |  |
Operating Leases, Income Statement, Lease Revenue | $ 37,467,000 | $ 37,626,000 | $ 36,625,000 |  |
Percentage of Continuing Revenue | 13.00% | 15.00% | 16.00% |  |
Lessor Equity Shares Owned, Significant Lessee | shares | 1,630,462 |  |  |  |
Percentage rent | $ 3,321,000 | $ 3,479,000 | $ 2,479,000 |  |
Default Tenant [Member] |  |  |  |  |
Percentage of Continuing Revenue | 3.00% |  |  |  |
Deferred Rent Receivables, Net | $ 3,482,000 |  |  |  |
Bickford RIDEA Properties [Member] | Bickford Senior Living [Member] |  |  |  |  |
Number of Real Estate Properties | properties | 35 |  |  |  |
Real Estate Acquisition [Member] |  |  |  |  |
Real Estate Investments During The Period | $ 191,231,000 |  |  |  |
Real Estate Acquisition [Member] | Acadia Healthcare [Member] |  |  |  |  |
Land Subject to Ground Leases | a | 10 |  |  |  |
Real Estate Investments During The Period | $ 4,840,000 |  |  |  |
Lessor, Operating Lease, Term of Contract | 10 years |  |  |  |
Initial lease rate | 7.00% |  |  |  |
Real Estate Acquisition [Member] | Discovery Senior Living [Member] |  |  |  |  |
Real Estate Investments During The Period | $ 34,600,000 |  |  |  |
Lessor, Operating Lease, Term of Contract | 15 years |  |  |  |
Noncash or Part Noncash Acquisition, Debt Assumed | $ 18,311,000 |  |  |  |
Mortgage Loans on Real Estate, Interest Rate | 4.60% |  |  |  |
Initial lease rate | 7.00% |  |  |  |
Capital Improvements Commitment | $ 500,000 |  |  |  |
Real Estate Acquisition [Member] | Navion Senior Solutions [Member] |  |  |  |  |
Real Estate Properties, Number Acquired | properties | 1 |  |  |  |
Real Estate Investments During The Period | $ 8,200,000 |  |  |  |
Real Estate Acquisition [Member] | Senior Living Communities [Member] |  |  |  |  |
Real Estate Investments During The Period | 6,830,000 |  |  |  |
Real Estate Acquisition [Member] | Bickford Senior Living [Member] |  |  |  |  |
Real Estate Investments During The Period | 10,400,000 |  |  |  |
Asset Purchase Transaction Costs | $ 200,000 |  |  |  |
Lessor, Operating Lease, Term of Contract | 14 years |  |  |  |
Number of Units in Real Estate Property | beds_or_units | 60 |  |  |  |
Initial lease rate | 7.25% |  |  |  |
Capital Improvements Commitment | $ 475,000 |  |  |  |
Bickford Development Properties [Member] | Bickford Senior Living [Member] |  |  |  |  |
Free Rent Lease Period, Number of Months | 6 months |  |  |  |
Number of Real Estate Properties To Be Constructed | properties | 5 |  |  |  |
Initial lease rate | 9.00% |  |  |  |
NHC - 1991 Lease [Member] | National Healthcare Corporation [Member] |  |  |  |  |
Number of Real Estate Properties | properties | 35 |  |  |  |
Minimum Annual Lease Income | $ 30,750,000 |  |  |  |
Percentage Rent Rate | 0.04 |  |  |  |
Number of additional lease renewal options | renewalOptions | 2 |  |  |  |
Lessor, Operating Lease, Renewal Term | 5 years |  |  |  |
NHC - 2013 Lease [Member] | National Healthcare Corporation [Member] |  |  |  |  |
Number Of Real Estate Properties Acquired | properties | 7 |  |  |  |
Minimum Annual Lease Income | $ 3,450,000 |  |  |  |
Percentage Rent Rate | 0.04 |  |  |  |
Purchase Option Amount | $ 49,000,000 |  |  |  |
Senior Housing Community [Member] |  |  |  |  |
Number of Real Estate Properties | properties | 136 |  |  |  |
Skilled Nursing Facility [Member] |  |  |  |  |
Number of Real Estate Properties | properties | 68 |  |  |  |
Gains (Losses) on Sales of Investment Real Estate | $ 2,805,000 |  |  |  |
Asset Held For Sale, Agreed Selling Price | $ 24,600,000 |  |  |  |
Skilled Nursing Facility [Member] | Ensign Group [Member] |  |  |  |  |
Number of Real Estate Properties | properties | 2 |  |  |  |
Skilled Nursing Facility [Member] | National Healthcare Corporation [Member] |  |  |  |  |
Number of Real Estate Properties | properties | 39 |  |  |  |
Skilled Nursing Facility [Member] | Health Services Management [Member] |  |  |  |  |
Lessor, Operating Lease, Payments to be Received | $ 7,241,000 |  |  |  |
Skilled Nursing Facility [Member] | Subleased Facilities [Member] | National Healthcare Corporation [Member] |  |  |  |  |
Number of Real Estate Properties | properties | 4 |  |  |  |
Skilled Nursing Facility [Member] | Lease Maturity Extension [Member] |  |  |  |  |
Number of Real Estate Properties | properties | 6 |  |  |  |
Lessor, Operating Lease, Term of Contract | 12 years |  |  |  |
Lessor, Operating Lease, Payments to be Received | $ 9,800,000 |  |  |  |
Hospital [Member] |  |  |  |  |
Number of Real Estate Properties | properties | 3 |  |  |  |
Medical Office Building [Member] |  |  |  |  |
Number of Real Estate Properties | properties | 2 |  |  |  |
Independent Living Facility [Member] | National Healthcare Corporation [Member] |  |  |  |  |
Number of Real Estate Properties | properties | 3 |  |  |  |
Vacant Land [Member] |  |  |  |  |
Gains (Losses) on Sales of Investment Real Estate | $ 123,000 |  |  |  |
Transition Tenant [Member] |  |  |  |  |
Minimum Annual Lease Income |  | $ 2,237,000 |  |  |
February 2017 Acquisition [Member] | Navion Senior Solutions [Member] |  |  |  |  |
Real Estate Properties, Number Acquired | properties | 2 |  |  |  |
February 2017 Acquisition [Member] | Ravn Senior Solutions [Member] |  |  |  |  |
Payments to Acquire Real Estate | $ 16,100,000 |  |  |  |
Asset Purchase Transaction Costs | $ 100,000 |  |  |  |
Lessor, Operating Lease, Term of Contract | 15 years |  |  |  |
Number of Units in Real Estate Property | beds_or_units | 86 |  |  |  |
Initial lease rate | 7.35% |  |  |  |
Capital Improvements Commitment | $ 207,000 |  |  |  |
Lease Incentive Commitment Assessed As Not Probable | 1,500,000 |  |  |  |
Payments to acquire real estate, seller earnout, contingent, not probable | $ 1,000,000 |  |  |  |
East Lake Mgmt, Acquisition [Member] |  |  |  |  |
Number of Real Estate Properties | properties | 3 |  |  |  |
Payments to acquire real estate, seller earnout, contingent, not probable | $ 750,000 |  |  |  |
December 2017 Acquisition [Member] | Ravn Senior Solutions [Member] |  |  |  |  |
Payments to Acquire Real Estate | 7,550,000 |  |  |  |
Asset Purchase Transaction Costs | $ 100,000 |  |  |  |
Lessor, Operating Lease, Term of Contract | 15 years |  |  |  |
Number of Units in Real Estate Property | beds_or_units | 32 |  |  |  |
Initial lease rate | 7.15% |  |  |  |
Capital Improvements Commitment | $ 650,000 |  |  |  |
Lease Incentive Commitment Assessed As Not Probable | 3,350,000 |  |  |  |
Grangeville, ID [Member] |  |  |  |  |
Gains (Losses) on Sales of Investment Real Estate | 1,654,000 |  |  |  |
Asset Held For Sale, Agreed Selling Price | 3,000,000 |  |  |  |
Real Estate Held-for-sale | $ 1,346,000 |  |  |  |
September 2027 [Member] | Bickford Senior Living [Member] |  |  |  |  |
Number of Real Estate Properties | properties | 4 |  |  |  |
Minimum Annual Lease Income | $ 125,000 |  |  |  |
Straight Line Rent Adjustments | $ 309,000 |  |  |  |

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- Definition This element represents the agreed selling price for an asset classified at the balance sheet date as held for sale. + References No definition available. + Details
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- Definition Asset Purchase Transaction Costs + References No definition available. + Details
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- Definition This element represents the total amount of capital improvements that an entity has committed to complete. + References No definition available. + Details
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Balance Type: | debit
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- Definition This item represents the number of free rent months allowed at the inception of a new lease. + References No definition available. + Details
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Namespace Prefix: | nhi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- 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

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- Definition This item represents the percentage of ownership interest which is retained subsequent to contribution into a joint venture. + References No definition available. + Details
Name: | nhi_JointVentureContributedPropertiesOwnershipInterestRetained
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Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition This item represents the percentage of ownership interest which is surrendered subsequent to contribution into a joint venture. + References No definition available. + Details
Name: | nhi_JointVentureContributedPropertiesOwnershipInterestSurrendered
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Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition The initial escalator rate charged from lease year 3 through the end of the lease term under a lease entered into in connection with the purchase of a property. + References No definition available. + Details
Name: | nhi_LeaseEscalatorRateAfterLeaseYear3
Namespace Prefix: | nhi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition The initial escalator rate charged from lease year 1 and through lease year 3 under a lease entered into in connection with the purchase of a property. + References No definition available. + Details
Name: | nhi_LeaseEscalatorRateFromLeaseYear1toLeaseYear3
Namespace Prefix: | nhi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition The initial lease escalator rate charged from lease year 2 through lease year 4 under a lease entered into in connection with the purchase of a property. + References No definition available. + Details
Name: | nhi_LeaseEscalatorRateLeaseYear2toLeaseYear4
Namespace Prefix: | nhi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition The initial lease escalator to be charged starting after lease year 4 under a lease entered into in connection with the purchase of a property. + References No definition available. + Details
Name: | nhi_LeaseEscalatorRateafterLeaseYear4
Namespace Prefix: | nhi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition This item represents the amount of a payment or a series of payments related to a lease incentive commitment which has been assessed as not probable and therefore is not recorded as payable. + References No definition available. + Details
Name: | nhi_LeaseIncentiveCommitmentAssessedAsNotProbable
Namespace Prefix: | nhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition This item represents a lessee's payment to acquire a purchase option. + References No definition available. + Details
Name: | nhi_LesseePaymentToAcquirePurchaseOption
Namespace Prefix: | nhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition This item represents the number of shares of a lessor that are owned by a significant lessee as of the end of the reporting period. + References No definition available. + Details
Name: | nhi_LessorEquitySharesOwnedSignificantLessee
Namespace Prefix: | nhi_
Data Type: | xbrli:sharesItemType
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- Definition The concept represents a total loan term in number of years + References No definition available. + Details
Name: | nhi_LoanTerm
Namespace Prefix: | nhi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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

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- Definition This element represents the minimum annual lease income to be received. + References No definition available. + Details
Name: | nhi_MinimumAnnualLeaseIncome
Namespace Prefix: | nhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition This item represents the original cost of corporate assets that are not part of the investment portfolio. + References No definition available. + Details
Name: | nhi_NonportfolioAssetsOriginalCost
Namespace Prefix: | nhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition This concept reflects the interest rate to be received on a loan receivable. + References No definition available. + Details
Name: | nhi_NoteReceivableInterestRate
Namespace Prefix: | nhi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Number Of Additional Lease Renewal Options + References No definition available. + Details
Name: | nhi_NumberOfAdditionalLeaseRenewalOptions
Namespace Prefix: | nhi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition The number of lessees of real estate property at the end of the period. + References No definition available. + Details
Name: | nhi_NumberOfLessees
Namespace Prefix: | nhi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Number Of Real Estate Properties Acquired + References No definition available. + Details
Name: | nhi_NumberOfRealEstatePropertiesAcquired
Namespace Prefix: | nhi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition This element represents the number of real estate properties to be constructed, based on an agreement or commitment. + References No definition available. + Details
Name: | nhi_NumberOfRealEstatePropertiesToBeConstructed
Namespace Prefix: | nhi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition This item represents the number of acquisition transactions completed within a specific time frame. + References No definition available. + Details
Name: | nhi_NumberofAcquisitionTransactions
Namespace Prefix: | nhi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of Master Leases + References No definition available. + Details
Name: | nhi_NumberofMasterLeases
Namespace Prefix: | nhi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition This element represents the amount of payments to be made to the seller of a real estate property contingent upon the occurrence of specific events. + References No definition available. + Details
Name: | nhi_Paymentstoacquirerealestatesellerearnoutcontingentnotprobable
Namespace Prefix: | nhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition This element represents the percentage of income recognized from a lease tenant. + References No definition available. + Details
Name: | nhi_PercentageOfContinuingRevenue
Namespace Prefix: | nhi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition This element represents the rental revenue rate earned during the period from lessee-operators based on revenues generated in their operations, generally in excess of a base amount. Generally stipulated in the lease agreement, it usually will provide for a fixed percentage of revenue to be paid as additional (or possibly only) rent due the lessor, and may be based on gross revenues, net revenues, or multiple variations thereof. + References No definition available. + Details
Name: | nhi_PercentageRentRate
Namespace Prefix: | nhi_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

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- Definition This item represents the amount of an outstanding purchase option. + References No definition available. + Details
Name: | nhi_PurchaseOptionAmount
Namespace Prefix: | nhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition This item represents the percentage rate to be applied to 12 month forward rent to determine the amount of a purchase option on real estate. + References No definition available. + Details
Name: | nhi_PurchaseOptionAmountForwardRentCapitalizationRate
Namespace Prefix: | nhi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition The element represents the original cost of all portfolio leased assets. + References No definition available. + Details
Name: | nhi_RealEstateInvestmentPropertyPortfolioAssets
Namespace Prefix: | nhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Real Estate Investments During The Period + References No definition available. + Details
Name: | nhi_RealEstateInvestmentsDuringThePeriod
Namespace Prefix: | nhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition This item represents the number of real estate properties for which the entity has made a binding commitment to purchase. + References No definition available. + Details
Name: | nhi_RealEstatePropertiesCommitmentToPurchase
Namespace Prefix: | nhi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition This item refers to the number of properties acquired during the period. + References No definition available. + Details
Name: | nhi_RealEstatePropertiesNumberAcquired
Namespace Prefix: | nhi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- 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
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- Definition Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571 + Details
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- Definition The total amount of revenue recognized for the period from operating leases, including minimum lease revenue, contingent revenue, percentage revenue and sublease revenue. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902458&loc=d3e39896-112707 + Details
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