Asset Purchase Transaction Costs

No definition available.

Name:	nhi_AssetPurchaseTransactionCosts
Namespace Prefix:	nhi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

This item represents the maximum amount of a contingent funding commitment.

+ References

No definition available.

+ Details

Name:	nhi_ContingentFundingCommitment
Namespace Prefix:	nhi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The expected year 1 cash inflow from real estate joint ventures involving both an operating company and a property company.

+ References

No definition available.

+ Details

Name:	nhi_ExpectedProceedsJointVenture
Namespace Prefix:	nhi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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

- Definition

This item represents the minimum rate a lease payment escalates each year.

+ References

No definition available.

+ Details

Name:	nhi_LeaseEscalatorMinimum
Namespace Prefix:	nhi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

This item represents the amount of loan and realty impairments net of any applicable gains or recoveries.

+ References

No definition available.

+ Details

Name:	nhi_LoanandLeaseLossesandRecoveriesNet
Namespace Prefix:	nhi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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

- 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

- 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

- Definition

This item represents the number of operators or tenants.

+ References

No definition available.

+ Details

Name:	nhi_NumberOfOperatorsTenants
Namespace Prefix:	nhi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- 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

- Definition

This item represents the minimum amount of a purchase option when the agreement indicates the greater of this amount of fair value.

+ References

No definition available.

+ Details

Name:	nhi_PurchaseOptionAmountMinimum
Namespace Prefix:	nhi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The element represents the original cost of all portfolio leased assets.

+ References

No definition available.

+ Details

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Namespace Prefix:	nhi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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

- Definition

This item represents the fair value of real estate property as calculated and agreed pursuant to a purchase option agreement between a Lessor and Lessee.

+ References

No definition available.

+ Details

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Namespace Prefix:	nhi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This item represents an accumulated straight-line rent receivable balance written off as a result of a lease amendment or termination.

+ References

No definition available.

+ Details

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Namespace Prefix:	nhi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The net gain (loss) resulting from sales and other disposals of real estate owned for investment purposes.

+ References

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+ Details

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Balance Type:	credit
Period Type:	duration

- Definition

The charge against earnings in the period to reduce the carrying amount of real property to fair value.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of investment in equity method investee and investment in and advance to affiliate.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-SubTopic 20
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-Paragraph 3
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+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Term of lessor's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Balance Type:	na
Period Type:	instant

- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

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-SubTopic 10
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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

The level of ownership or equity interest acquired in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- 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

- Definition

The number of states the entity operates in as of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of units in a real estate property owned as of the balance sheet date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- 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://fasb.org/us-gaap/role/ref/otherTransitionRef
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-Topic 840
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121549951&loc=d3e39896-112707

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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

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-SubTopic 10
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow associated with the proceeds from sale of notes receivable, as well as principal collections from a borrowing supported by a written promise to pay an obligation (note receivable).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-SubTopic 10
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Cash received for the sale of real estate that is not part of an investing activity during the current period.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-SubTopic 10
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Name:	us-gaap_PropertyPlantAndEquipmentNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=nhi_RevenueAsOfTotalExceeds10Member
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Name:	nhi_LeaseOptionAxis=nhi_OpenNowMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

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Name:	nhi_LeaseOptionAxis=nhi_After2021Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

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Name:	srt_MajorCustomersAxis=nhi_BickfordSeniorLivingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

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Real Estate (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended
Real Estate (Narrative) (Details) $ in Thousands	Jun. 30, 2020 USD ($) properties beds_or_units	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) properties beds_or_units	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Number of Real Estate Properties \| properties	227		227
Number of States in which Entity Operates	34		34
Real Estate Investment Property, Portfolio Assets	$ 3,244,562		$ 3,244,562
Number of Lessees	34		34
Payments to Acquire Real Estate			$ 94,630	$ 200,632
Operating Leases, Income Statement, Lease Revenue	$ 77,917	$ 72,578	154,444	143,531
Loan and Lease Losses and Recoveries, Net	(380)	0	1,195	2,500
Contingent Funding Commitment	31,850		31,850
Property, Plant and Equipment, Net	$ 2,691,376		$ 2,691,376		$ 2,560,393
Lease Escalator Minimum	2.25%		2.25%
Gains (Losses) on Sales of Investment Real Estate	$ 0	0	$ 21,007	0
Loans and Leases Receivable, Gross	$ 305,319		$ 305,319
Revenue as % of Total, Exceeds 10% [Member]
Number of States in which Entity Operates \| beds_or_units	1		1
Open Now [Member]
Number of Real Estate Properties \| beds_or_units	2		2
Minimum Annual Lease Income			$ 8,715	9,216
Property, Plant and Equipment, Net	$ 11,784		$ 11,784
After 2021 [Member]
Number of Real Estate Properties \| beds_or_units	12		12
Property, Plant and Equipment, Net	$ 120,808		$ 120,808
Bickford Senior Living [Member]
Number of Real Estate Properties \| properties	48		48
Real Estate Investments During The Period			$ 15,100
Number of Units in Real Estate Property \| beds_or_units	60		60
Lessor, Operating Lease, Term of Contract	12 years		12 years
Initial lease rate	8.00%		8.00%
Operating Leases, Income Statement, Lease Revenue			$ 27,392	$ 26,122
Percentage of Continuing Revenue			16.00%	17.00%
Proceeds from Sale and Collection of Notes Receivable			$ 14,091
Non-Performing Lease [Member]
Number of Real Estate Properties \| beds_or_units	9		9
Operating Leases, Income Statement, Lease Revenue	$ 1,269	$ 506	$ 2,824	$ 1,208
Number of Operators/Tenants \| beds_or_units	5		5
LCS Timber Ridge [Member]
Number of Units in Real Estate Property \| beds_or_units	401		401
Lessor, Operating Lease, Term of Contract	7 years		7 years
Initial lease rate	6.75%		6.75%
Note Receivable Interest Rate	5.75%		5.75%
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	$ 124,989		$ 124,989
Expected Proceeds Joint Venture			8,216
Timber Ridge OpCo
Contingent Funding Commitment	10,000		10,000
Quorum Health [Member]
Operating Leases, Income Statement, Lease Revenue			1,751
Loan and Lease Losses and Recoveries, Net			380
Property, Plant and Equipment, Net	$ 10,075		10,075
Autumn Trace
Real Estate Investments During The Period			$ 14,250
Number of Units in Real Estate Property \| beds_or_units	44		44
Asset Purchase Transaction Costs			$ 150
Lessor, Operating Lease, Term of Contract	15 years		15 years
Initial lease rate	7.25%		7.25%
Lessee, Operating Lease, Renewal Term	5 years		5 years
Skilled Nursing Facility [Member]
Number of Real Estate Properties \| properties	72		72
Skilled Nursing Facility [Member] \| LCS Timber Ridge [Member]
Number of Units in Real Estate Property \| beds_or_units	45		45
Assisted Living Facility [Member] \| LCS Timber Ridge [Member]
Number of Units in Real Estate Property \| beds_or_units	26		26
Independent Living Facility [Member] \| LCS Timber Ridge [Member]
Number of Units in Real Estate Property \| beds_or_units	330		330
Asset Held For Sale [Member] \| Brookdale Senior Living [Member]
Number of Real Estate Properties \| properties	8		8
Real Estate Property Company [Member] \| Noncontrolling Interest [Member]
Noncash or Part Noncash Acquisition, Interest Acquired			20.00%
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	$ 10,778		$ 10,778
Real Estate Property Company [Member] \| LCS Timber Ridge [Member]
Noncash or Part Noncash Acquisition, Interest Acquired			80.00%
Real Estate Operating Company [Member] \| Noncontrolling Interest [Member]
Noncash or Part Noncash Acquisition, Interest Acquired			75.00%
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	875		$ 875
Real Estate Operating Company [Member] \| Controlling Interest [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	2,625		$ 2,625
Real Estate Operating Company [Member] \| LCS Timber Ridge [Member]
Noncash or Part Noncash Acquisition, Interest Acquired			25.00%
Consideration Type, Existing Mortgage [Member] \| LCS Timber Ridge [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	59,350		$ 59,350
Consideration Type, Additional Mortgage [Member] \| LCS Timber Ridge [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	21,650		21,650
Consideration Type, Total Mortgage [Member] \| LCS Timber Ridge [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	81,000		81,000
Consideration Type, Cash [Member] \| LCS Timber Ridge [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	$ 43,114		$ 43,114
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] \| Bickford Senior Living [Member]
Number of Real Estate Properties \| properties	2		2
Note Receivable Interest Rate	7.00%		7.00%
Write Off Of Straight Line Rent Receivable			$ 124
Loans and Leases Receivable, Gross	$ 4,000		4,000
Impairment of Real Estate			2,500
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] \| Brookdale Senior Living [Member]
Operating Leases, Income Statement, Lease Revenue			229	$ 2,125
Purchase Option, Amount, Minimum	37,520		37,520
Real Estate Property, Fair Value, Purchase Option Calculation	$ 41,000		41,000
Proceeds from Sale of Real Estate			39,260
Gains (Losses) on Sales of Investment Real Estate			$ 20,752
ARIZONA \| Asset Held For Sale [Member] \| Brookdale Senior Living [Member]
Number of Real Estate Properties \| properties	4		4
TENNESSEE \| Asset Held For Sale [Member] \| Brookdale Senior Living [Member]
Number of Real Estate Properties \| properties	3		3
SOUTH CAROLINA
Percentage of Continuing Revenue			10.30%
SOUTH CAROLINA \| Asset Held For Sale [Member] \| Brookdale Senior Living [Member]
Number of Real Estate Properties \| properties	1		1