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Mortgage And Other Notes Receivable (Narrative) (Details) - 9 months ended Sep. 30, 2020 | USD ($) | beds_or_units | USD ($) | Total | properties
--- | --- | --- | --- | --- | ---
Number of health care properties related to mortgage notes receivables |  | 15 |  |  | 15
Loans and Leases Receivable, Commitments, Fixed Rates | $ 256,450,000 |  |  |  |
Probability of Default, Increase, Current Conditions Adjustment |  |  |  | 20.00% |
Loss Given Default, Increase, Current Conditions Adjustment |  |  |  | 20.00% |
Estimated Credit Losses, Current Conditions Adjustment, Combined |  |  |  | 44.00% |
Loans and Leases Receivable, Gross |  |  | $ 292,189,000 |  |
Interest Rate Swaps, Maturity Date, After June 2020 [Member] |  |  |  |  |
Derivative, Notional Amount |  |  | 400,000,000 |  |
Current Conditions Adjustment, COVID-19 Allowance Increase [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Noncurrent |  |  | 1,700,000 |  |
Current Conditions Adjustment, Portfolio Allowance Decrease [Member] |  |  |  |  |
Financing Receivable, Allowance for Credit Loss, Noncurrent |  |  | 693,000 |  |
Bickford Note Investment [Member] |  |  |  |  |
Loans and Leases Receivable, Commitments, Fixed Rates | $ 42,900,000 |  |  |  |
Contingent Incentive Payments |  |  | 2,000,000 |  |
LCS Sagewood [Member] |  |  |  |  |
Notes Receivable, Total Borrowings, Master Credit Agreement |  |  | 180,000,000 |  |
Notes Receivable, Number Of Loans, Master Credit Agreement |  |  |  | 2 |
LCS Timber Ridge [Member] |  |  |  |  |
Number of Units in Real Estate Property | beds_or_units |  | 401 |  |  |
Lessor, Operating Lease, Term of Contract | 7 years |  |  |  |
Note Receivable Interest Rate |  |  |  | 5.75% |
Timber Ridge OpCo |  |  |  |  |
Financing Receivable, Revolving |  |  | 5,000,000 |  |
Senior Living Communities [Member] |  |  |  |  |
Loans and Leases Receivable, Commitments, Fixed Rates | $ 38,870,000 |  |  |  |
Loans and Lease Receivable, Maximum Revolving Amount |  |  | 12,000,000 |  |
Revolving Note Receivable, Maximum Amount Available for Working Capital Purposes |  |  | 10,000,000 |  |
Revolving Note Receivable, Amount Outstanding |  |  | (6,170,000) |  |
Loans Receivable, Description of Variable Rate Basis, Reference Rate Maturity | 10 years |  |  |  |
Loans Receivable, Basis Spread on Variable Rate |  |  |  | 6.00% |
Number of Term Loans |  |  |  | 2 |
Note Receivable Interest Rate |  |  |  | 10.00% |
Loans Receivable, Description, Variable Rate Basis, Reference Rate | 6.69% |  |  |  |
Not Secured By Real Estate [Member] | Senior Living Communities [Member] |  |  |  |  |
Number of Units in Real Estate Property | beds_or_units |  | 186 |  |  |
Note A [Member] | LCS Sagewood [Member] |  |  |  |  |
Loans and Leases Receivable, Commitments, Fixed Rates | $ 118,800,000 |  |  |  |
Notes Receivable, Interest Rate, Master Credit Agreement |  |  |  | 7.25% |
Loan Term | 10 years |  |  |  |
Notes Receivable, Total Borrowings, Master Credit Agreement |  |  | 118,800,000 |  |
Loans And Leases Receivable, Commitment, Fixed Rates, Escalator, Basis Points |  |  |  | 10 |
Note Receivable, First Note Year For Rate Escalator | three years |  |  |  |
Note Receivable, Prepayment Penalty, Rate |  |  |  | 2.00% |
Note Receivable, Prepayment Penalty, Rate Decrease |  |  |  | 1.00% |
Note A [Member] | Senior Living Communities [Member] |  |  |  |  |
Loans and Leases Receivable, Commitments, Fixed Rates | $ 12,000,000 |  |  |  |
Note B [Member] | LCS Sagewood [Member] |  |  |  |  |
Loans and Leases Receivable, Commitments, Fixed Rates | $ 61,200,000 |  |  |  |
Notes Receivable, Interest Rate, Master Credit Agreement |  |  |  | 8.50% |
Loan Term | 5 years |  |  |  |
Notes Receivable, Total Borrowings, Master Credit Agreement |  |  | 61,200,000 |  |
Note B [Member] | Senior Living Communities [Member] |  |  |  |  |
Loans and Leases Receivable, Commitments, Fixed Rates | $ 2,000,000 |  |  |  |
After 2021 [Member] | Senior Living Communities [Member] |  |  |  |  |
Loans and Lease Receivable, Maximum Revolving Amount |  |  | 7,000,000 |  |
Revolving Note Receivable, Maximum Amount Available for Working Capital Purposes |  |  | $ 5,000,000 |  |
June 2020 | Bickford Note Investment [Member] |  |  |  |  |
Loans and Leases Receivable, Commitments, Fixed Rates | $ 14,200,000 |  |  |  |
Number of Units in Real Estate Property | beds_or_units |  | 64 |  |  |
Loan Term | 5 years |  |  |  |
Note Receivable Interest Rate |  |  |  | 9.00% |

X
- Definition This item represents contingent payments that would be due to a development manager if certain operating metrics or performance thresholds were met. + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Estimated Credit Losses, Current Conditions Adjustment, Probability of Default and Loss Given Default, Combined + References No definition available. + Details
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Namespace Prefix: | nhi_
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Balance Type: | na
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- Definition The concept represents a total loan term in number of years + References No definition available. + Details
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Namespace Prefix: | nhi_
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Balance Type: | na
Period Type: | duration

X
- Definition Reflects the number of basis points by which the interest rate on a fixed rate note or lease receivable will escalate periodically. + References No definition available. + Details
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Namespace Prefix: | nhi_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition The reference rate for variable rate loans receivable, such as LIBOR or the US Treasury rate. + References No definition available. + Details
Name: | nhi_LoansReceivableDescriptionVariableRateBasisReferenceRate
Namespace Prefix: | nhi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition This item represents the maturity of the reference rate used, such as three months or six months LIBOR. + References No definition available. + Details
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Namespace Prefix: | nhi_
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- Definition Loans and Lease Receivable, Maximum Revolving Amount + 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 estimated increase in the expected loss given a default as part of managements assessment of estimated credit losses based on current economic conditions. + References No definition available. + Details
Name: | nhi_LossGivenDefaultIncreaseCurrentConditionsAdjustment
Namespace Prefix: | nhi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition This concept represents the note year in which the note receivable interest rate will begin to escalate by a fixed amount. + References No definition available. + Details
Name: | nhi_NoteReceivableFirstNoteYearForRateEscalator
Namespace Prefix: | nhi_
Data Type: | us-types:durationStringItemType
Balance Type: | na
Period Type: | duration

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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

X
- Definition This concept represents the percentage of outstanding principal that will be paid as a prepayment penalty. + References No definition available. + Details
Name: | nhi_NoteReceivablePrepaymentPenaltyRate
Namespace Prefix: | nhi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition This concept represents the annual percentage point decrease in the prepayment penalty percentage rate. + References No definition available. + Details
Name: | nhi_NoteReceivablePrepaymentPenaltyRateDecrease
Namespace Prefix: | nhi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition This item represents the interest rate to be received for outstanding borrowings under a master credit agreement. + References No definition available. + Details
Name: | nhi_NotesReceivableInterestRateMasterCreditAgreement
Namespace Prefix: | nhi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition This item represents the number of notes receivable in a master credit agreement. + References No definition available. + Details
Name: | nhi_NotesReceivableNumberOfLoansMasterCreditAgreement
Namespace Prefix: | nhi_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

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- Definition This item represents the total amount of available borrowings in a notes receivable master credit agreement. + References No definition available. + Details
Name: | nhi_NotesReceivableTotalBorrowingsMasterCreditAgreement
Namespace Prefix: | nhi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Number Of Health Care Properties Related To Mortgage Notes Receivables + References No definition available. + Details
Name: | nhi_NumberOfHealthCarePropertiesRelatedToMortgageNotesReceivables
Namespace Prefix: | nhi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Number of Term Loans + References No definition available. + Details
Name: | nhi_NumberofTermLoans
Namespace Prefix: | nhi_
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Balance Type: | na
Period Type: | instant

X
- Definition This item represents the estimated increase in the probability of default as part of managements assessment of estimated credit losses based on current economic conditions. + References No definition available. + Details
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Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Revolving Note Receivable, Amount Outstanding + References No definition available. + Details
Name: | nhi_RevolvingNoteReceivableAmountOutstanding
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Balance Type: | debit
Period Type: | instant

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- Definition Revolving Note Receivable, Maximum Amount Available for Working Capital Purposes + 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 Amount of allowance for credit loss on financing receivable, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5074-111524 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121599878&loc=SL82895884-210446 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(4)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959 + Details
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- Definition Amount of financing receivable that can be withdrawn, repaid and redrawn. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919232-210447 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 + Details
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X
- Definition Term of lessor's operating lease, 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 -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=121576215&loc=SL77919359-209981 + Details
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Balance Type: | na
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- Definition Reflects the amount of cash required to fully fund agreements to provide advances to borrowers and lessees at stated interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 825 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=108315417&loc=d3e61044-112788 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 825 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=108315417&loc=d3e61082-112788 + Details
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Balance Type: | credit
Period Type: | duration

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- 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 Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522 + Details
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- Definition The percentage points (also referred to as 'margin') added to the reference rate as stated in the loan agreement and used to compute the variable rate on the loans receivable. For instance, the loan agreement might state that the interest rate the borrower is obligated to pay is the London Interbank Offered Rate (LIBOR) plus three quarters (3/4) of a percentage point adjusted quarterly (each three months). LIBOR in this example is the index or reference rate, 3/4 percentage point is the margin, the reference rate plus the margin is the fully indexed rate. This element would be used to report separately the margin. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
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- 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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Balance Type: | na
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- Details
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- Details
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