Basis of Presentation and Significant Accounting Policies (Policy)	3 Months Ended
Mar. 31, 2024
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with United States generally accepted accounting principles (“GAAP”) for interim financial statements. In our opinion, the accompanying unaudited condensed consolidated financial statements reflect all adjustments consisting of normal recurring adjustments necessary for a fair presentation. Interim results of operations are not necessarily indicative of the results that may be achieved for a full year. The condensed consolidated financial statements and related notes do not include all information and footnotes required by GAAP for annual reports. These interim condensed consolidated financial statements should be read in conjunction with our audited consolidated financial statements and notes thereto as of and for the year ended December 31, 2023, included in our Annual Report on Form 10-K for the year ended December 31, 2023 filed with the Securities and Exchange Commission (the “SEC”).
Principles of Consolidation	Principles of Consolidation The condensed consolidated financial statements include the accounts of the Company, and its wholly owned subsidiaries, joint ventures and subsidiaries in which we have a controlling interest. We also consolidate certain entities when control of such entities can be achieved through means other than voting rights (“variable interest entities” or “VIEs”) if the Company is deemed to be the primary beneficiary of such entities. All material intercompany transactions and balances are eliminated in consolidation. Our consolidated total assets and liabilities include two consolidated ventures comprising our SHOP activities, each formed with a separate partner - Merrill Gardens, L.L.C. (“Merrill”) and DSHI NHI Holiday LLC (the “Discovery member”), a related party of Discovery Senior Living (“Discovery”). We consider both ventures to be VIEs as the members of each, as a group, lack the characteristics of a controlling financial interest. We are deemed to be the primary beneficiary of each VIE because we have the ability to control the activities that most significantly impact each VIE’s economic performance. Reference Notes 5 and 16 for further discussion of our SHOP ventures. We also consolidate two real estate partnerships formed with our partners, Discovery Senior Housing Investor XXIV, LLC, a related party of Discovery and LCS Timber Ridge LLC (“LCS”) to invest in senior housing facilities. We consider both partnerships to be VIEs, as either the members, as a group, lack the characteristics of a controlling financial interest or the total equity at risk is insufficient to finance activities without additional subordinated financial support. NHI directs the activities that most significantly impact economic performance of these partnerships, subject to limited protective rights extended to our partners for specified business decisions. Because of our control of these partnerships, we include their assets, liabilities, noncontrolling interests and operations in our condensed consolidated financial statements. Reference Note 16 for further discussion of these real estate partnerships. We use the equity method of accounting when we own an interest in an entity over which we can exert significant influence but cannot control the entity’s operations. We discontinue equity method accounting if our investment in an entity (and net advances) is reduced to zero unless we have guaranteed obligations of the entity or are otherwise committed to provide further financial support for the entity. Reference Note 6 for further discussion of our equity method investment. We have concluded that the Company is not the primary beneficiary for certain investments where we lack either directly or through related parties the power to direct the activities that most significantly impact their economic performance. See Note 16 for information on unconsolidated VIEs.
Noncontrolling Interests	Noncontrolling Interests Contingently redeemable noncontrolling interests are recorded at their initial carrying amounts upon issuance and are subsequently adjusted to reflect their share of gains or losses and distributions attributable to the noncontrolling interests. In periods where they are or will become probable of redemption, an adjustment to the redemption value of the noncontrolling interests is also recognized through “Capital in excess of par value” on the Company’s Condensed Consolidated Balance Sheets and included in our computation of earnings per share. As of March 31, 2024, the Merrill SHOP venture noncontrolling interest was classified in mezzanine equity, as discussed further in Note 10.
Cash and Cash Equivalents and Restricted Cash	Cash and Cash Equivalents and Restricted Cash Cash equivalents consist of all highly liquid investments with original maturities of three months or less. Restricted cash includes amounts required to be held on deposit or subject to an agreement (e.g., with a qualified intermediary subject to an exchange agreement pursuant to Section 1031 of the Internal Revenue Code of 1986, as amended (the “Internal Revenue Code”) or in accordance with agency agreements governing our mortgages).
Concentration of Credit Risks	Concentration of Credit Risks Our credit risks primarily relate to cash and cash equivalents and investments in mortgage and other notes receivable. Cash and cash equivalents are primarily held in bank accounts and overnight investments. We maintain our bank deposit accounts with large financial institutions in amounts that may exceed federally insured limits. We have not experienced any losses in such accounts. Our mortgage and other notes receivable consist primarily of secured loans on facilities. Our financial instruments, principally our investments in notes receivable, are subject to the possibility of loss of the carrying values as a result of the failure of other parties to perform according to their contractual obligations which may make the instruments less valuable. We obtain collateral in the form of mortgage liens and other protective rights for notes receivable and continually monitor these rights in order to reduce such possibilities of loss. We evaluate the need to provide for reserves for potential losses on our financial instruments based on management’s periodic review of our portfolio on an instrument-by-instrument basis.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets We evaluate the recoverability of the carrying amount of our long-lived assets when events or circumstances, including significant physical changes, significant adverse changes in general economic conditions or significant deterioration of the underlying cash flows of the long-lived assets, indicate that the carrying amount of the long-lived assets may not be recoverable. The need to recognize an impairment charge is based on estimated undiscounted future cash flows compared to the carrying amount. If recognition of an impairment charge is necessary, it is measured as the amount by which the carrying amount of the property exceeds the estimated fair value of the long-lived asset.
Revenue Recognition	Revenue Recognition Rental Income - Our leases generally provide for rent escalators throughout the term of the lease. Base rental income is recognized using the straight-line method over the term of the lease to the extent that lease payments are considered collectable and the lease provides for specific contractual escalators. Under certain leases, we receive additional contingent rent, which is calculated on the increase in revenues of the tenant over a base year or base quarter. We recognize contingent rent annually or quarterly based on the actual revenues of the tenant once the target threshold has been achieved. Lease payments that depend on a factor directly related to future use of the property, such as an increase in annual revenues over a base year, are considered to be contingent rent and are excluded from the schedule of minimum lease payments. The Company reviews its operating lease receivables for collectability on a regular basis, taking into consideration changes in factors such as the tenant’s payment history, the financial condition of the tenant, business conditions in which the tenant operates and economic conditions in the area where the property is located. In the event that collectability with respect to any tenant is not probable, a direct write-off of the receivable is made as an adjustment to rental income and any future rental revenue is recognized only when the tenant makes a rental payment. Reference Note 3 for further discussion. Resident Fees and Services - Resident fee and services revenue associated with our SHOP activities is recognized as the related performance obligations are satisfied and includes resident room charges, community fees and other resident charges. Residency agreements are generally short-term (30 days to one year), and entitle the resident to certain room and care services for a monthly fee billed in advance. Revenue for certain related services is billed monthly in arrears. The Company has elected the lessor practical expedient within Accounting Standards Codification (“ASC”) 842, Leases, not to separate the lease and nonlease components within our resident agreements as the timing and pattern of transfer to the resident are the same. The Company has determined that the nonlease component is the predominant component within the contract and will recognize revenue under ASC 606, Revenue Recognition from Contracts with Customers.
Interest Income from Mortgage and Other Notes Receivable	Interest Income from Mortgage and Other Notes Receivable Interest income is recognized based on the interest rates and principal amounts outstanding on the notes receivable. We identify a mortgage note as non-performing based on various criteria including timeliness of required payments, compliance with other provisions under the related note agreement, and an evaluation of the borrower’s current financial condition for indicators that it is probable it cannot pay its contractual amounts. A non-performing loan is returned to accrual status at such time as the note becomes contractually current and management believes all future principal and interest will be received according to the contractual terms of the note.
Income Taxes	Income Taxes We intend at all times to qualify as a REIT under Sections 856 through 860 of the Internal Revenue Code. Accordingly, we will generally not be subject to U.S. federal income tax, provided that we continue to qualify as a REIT and make distributions to stockholders equal to or in excess of 90% our taxable income. A failure to qualify under the applicable REIT qualification rules and regulations would have a material adverse impact on our financial position, results of operations and cash flows. Certain activities that we undertake may be conducted by subsidiary entities that have elected to be treated as taxable REIT subsidiaries (“TRSs”). TRSs are subject to federal, state, and local income taxes. Accordingly, a provision for income taxes has been made in the condensed consolidated financial statements.
Segments	Segments We operate our business through two reportable segments: Real Estate Investments and SHOP. In our Real Estate Investments segment, we invest in (i) senior housing and healthcare real estate and lease those properties to healthcare operating companies under primarily triple-net leases that obligate tenants to pay all property-related expenses and (ii) mortgage and other notes receivable throughout the United States. Our SHOP segment is comprised of the operations of 15 ILFs located throughout the United States that are operated on behalf of the Company by independent managers pursuant to the terms of separate management agreements. Reference Notes 5 and 15 for additional information.
Earnings Per Share	Earnings Per Share Our unvested restricted stock awards contain non-forfeitable rights to dividends, and accordingly, these awards are deemed to be participating securities. Therefore, the Company applies the two-class method to calculate basic and diluted earnings. Under the two-class method, we allocate net income attributable to stockholders to common stockholders and holders of unvested restricted stock by using the weighted-average shares of each class outstanding for quarter-to-date and year-to-date periods, based on their respective participation rights to dividends declared and undistributed earnings. Basic earnings per common share is computed by dividing net income attributable to common stockholders by the weighted average number of shares of common stock outstanding during the period. Diluted earnings per common share reflects the effect of dilutive securities
Recent Accounting Pronouncements	Recent Accounting Pronouncements In November 2023, the Financial Accounting Standards Board issued Accounting Standard Update (“ASU”) 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. The ASU enhances segment disclosures by requiring public entities to provide investors with additional, more detailed information about a reportable segment’s expenses. The ASU also requires disclosure of the chief operating decision maker’s (“CODM”) title and position on an annual basis, as well as an explanation of how the CODM uses the reported measures and other disclosures. The amendment is effective for the Company for the year ending December 31, 2024. We are currently evaluating the impact of this standard on our consolidated financial statements and related disclosures.

Basis of Presentation and Significant Accounting Policies (Policy)

3 Months Ended

Mar. 31, 2024

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with United States generally accepted accounting principles (“GAAP”) for interim financial statements. In our opinion, the accompanying unaudited condensed consolidated financial statements reflect all adjustments consisting of normal recurring adjustments necessary for a fair presentation. Interim results of operations are not necessarily indicative of the results that may be achieved for a full year. The condensed consolidated financial statements and related notes do not include all information and footnotes required by GAAP for annual reports. These interim condensed consolidated financial statements should be read in conjunction with our audited consolidated financial statements and notes thereto as of and for the year ended December 31, 2023, included in our Annual Report on Form 10-K for the year ended December 31, 2023 filed with the Securities and Exchange Commission (the “SEC”).

Principles of Consolidation

The condensed consolidated financial statements include the accounts of the Company, and its wholly owned subsidiaries, joint ventures and subsidiaries in which we have a controlling interest. We also consolidate certain entities when control of such entities can be achieved through means other than voting rights (“variable interest entities” or “VIEs”) if the Company is deemed to be the primary beneficiary of such entities. All material intercompany transactions and balances are eliminated in consolidation.

Our consolidated total assets and liabilities include two consolidated ventures comprising our SHOP activities, each formed with a separate partner - Merrill Gardens, L.L.C. (“Merrill”) and DSHI NHI Holiday LLC (the “Discovery member”), a related party of Discovery Senior Living (“Discovery”). We consider both ventures to be VIEs as the members of each, as a group, lack the characteristics of a controlling financial interest. We are deemed to be the primary beneficiary of each VIE because we have the ability to control the activities that most significantly impact each VIE’s economic performance. Reference Notes 5 and 16 for further discussion of our SHOP ventures.

We also consolidate two real estate partnerships formed with our partners, Discovery Senior Housing Investor XXIV, LLC, a related party of Discovery and LCS Timber Ridge LLC (“LCS”) to invest in senior housing facilities. We consider both partnerships to be VIEs, as either the members, as a group, lack the characteristics of a controlling financial interest or the total

equity at risk is insufficient to finance activities without additional subordinated financial support. NHI directs the activities that most significantly impact economic performance of these partnerships, subject to limited protective rights extended to our partners for specified business decisions. Because of our control of these partnerships, we include their assets, liabilities, noncontrolling interests and operations in our condensed consolidated financial statements. Reference Note 16 for further discussion of these real estate partnerships.

We use the equity method of accounting when we own an interest in an entity over which we can exert significant influence but cannot control the entity’s operations. We discontinue equity method accounting if our investment in an entity (and net advances) is reduced to zero unless we have guaranteed obligations of the entity or are otherwise committed to provide further financial support for the entity. Reference Note 6 for further discussion of our equity method investment.

We have concluded that the Company is not the primary beneficiary for certain investments where we lack either directly or through related parties the power to direct the activities that most significantly impact their economic performance. See Note 16 for information on unconsolidated VIEs.

Noncontrolling Interests

Contingently redeemable noncontrolling interests are recorded at their initial carrying amounts upon issuance and are subsequently adjusted to reflect their share of gains or losses and distributions attributable to the noncontrolling interests. In periods where they are or will become probable of redemption, an adjustment to the redemption value of the noncontrolling interests is also recognized through “Capital in excess of par value” on the Company’s Condensed Consolidated Balance Sheets and included in our computation of earnings per share. As of March 31, 2024, the Merrill SHOP venture noncontrolling interest was classified in mezzanine equity, as discussed further in Note 10.

Cash and Cash Equivalents and Restricted Cash

Cash equivalents consist of all highly liquid investments with original maturities of three months or less. Restricted cash includes amounts required to be held on deposit or subject to an agreement (e.g., with a qualified intermediary subject to an exchange agreement pursuant to Section 1031 of the Internal Revenue Code of 1986, as amended (the “Internal Revenue Code”) or in accordance with agency agreements governing our mortgages).

Concentration of Credit Risks

Our credit risks primarily relate to cash and cash equivalents and investments in mortgage and other notes receivable. Cash and cash equivalents are primarily held in bank accounts and overnight investments. We maintain our bank deposit accounts with large financial institutions in amounts that may exceed federally insured limits. We have not experienced any losses in such accounts. Our mortgage and other notes receivable consist primarily of secured loans on facilities.

Our financial instruments, principally our investments in notes receivable, are subject to the possibility of loss of the carrying values as a result of the failure of other parties to perform according to their contractual obligations which may make the

instruments less valuable. We obtain collateral in the form of mortgage liens and other protective rights for notes receivable and continually monitor these rights in order to reduce such possibilities of loss. We evaluate the need to provide for reserves for potential losses on our financial instruments based on management’s periodic review of our portfolio on an instrument-by-instrument basis.

Impairment of Long-Lived Assets

We evaluate the recoverability of the carrying amount of our long-lived assets when events or circumstances, including significant physical changes, significant adverse changes in general economic conditions or significant deterioration of the underlying cash flows of the long-lived assets, indicate that the carrying amount of the long-lived assets may not be recoverable. The need to recognize an impairment charge is based on estimated undiscounted future cash flows compared to the carrying amount. If recognition of an impairment charge is necessary, it is measured as the amount by which the carrying amount of the property exceeds the estimated fair value of the long-lived asset.

Revenue Recognition

Rental Income - Our leases generally provide for rent escalators throughout the term of the lease. Base rental income is recognized using the straight-line method over the term of the lease to the extent that lease payments are considered collectable and the lease provides for specific contractual escalators. Under certain leases, we receive additional contingent rent, which is calculated on the increase in revenues of the tenant over a base year or base quarter. We recognize contingent rent annually or quarterly based on the actual revenues of the tenant once the target threshold has been achieved. Lease payments that depend on a factor directly related to future use of the property, such as an increase in annual revenues over a base year, are considered to be contingent rent and are excluded from the schedule of minimum lease payments.

The Company reviews its operating lease receivables for collectability on a regular basis, taking into consideration changes in factors such as the tenant’s payment history, the financial condition of the tenant, business conditions in which the tenant operates and economic conditions in the area where the property is located. In the event that collectability with respect to any tenant is not probable, a direct write-off of the receivable is made as an adjustment to rental income and any future rental revenue is recognized only when the tenant makes a rental payment. Reference Note 3 for further discussion.

Resident Fees and Services - Resident fee and services revenue associated with our SHOP activities is recognized as the related performance obligations are satisfied and includes resident room charges, community fees and other resident charges.

Residency agreements are generally short-term (30 days to one year), and entitle the resident to certain room and care services for a monthly fee billed in advance. Revenue for certain related services is billed monthly in arrears. The Company has elected the lessor practical expedient within Accounting Standards Codification (“ASC”) 842, Leases, not to separate the lease and nonlease components within our resident agreements as the timing and pattern of transfer to the resident are the same. The Company has determined that the nonlease component is the predominant component within the contract and will recognize revenue under ASC 606, Revenue Recognition from Contracts with Customers.

Interest Income from Mortgage and Other Notes Receivable

Interest income is recognized based on the interest rates and principal amounts outstanding on the notes receivable. We identify a mortgage note as non-performing based on various criteria including timeliness of required payments, compliance with other provisions under the related note agreement, and an evaluation of the borrower’s current financial condition for indicators that it is probable it cannot pay its contractual amounts. A non-performing loan is returned to accrual status at such time as the note becomes contractually current and management believes all future principal and interest will be received according to the contractual terms of the note.

Income Taxes

We intend at all times to qualify as a REIT under Sections 856 through 860 of the Internal Revenue Code. Accordingly, we will generally not be subject to U.S. federal income tax, provided that we continue to qualify as a REIT and make distributions to stockholders equal to or in excess of 90% our taxable income. A failure to qualify under the applicable REIT qualification rules and regulations would have a material adverse impact on our financial position, results of operations and cash flows.

Certain activities that we undertake may be conducted by subsidiary entities that have elected to be treated as taxable REIT subsidiaries (“TRSs”). TRSs are subject to federal, state, and local income taxes. Accordingly, a provision for income taxes has been made in the condensed consolidated financial statements.

Segments

We operate our business through two reportable segments: Real Estate Investments and SHOP. In our Real Estate Investments segment, we invest in (i) senior housing and healthcare real estate and lease those properties to healthcare operating companies under primarily triple-net leases that obligate tenants to pay all property-related expenses and (ii) mortgage and other notes receivable throughout the United States. Our SHOP segment is comprised of the operations of 15 ILFs located throughout the United States that are operated on behalf of the Company by independent managers pursuant to the terms of separate management agreements. Reference Notes 5 and 15 for additional information.

Earnings Per Share

Our unvested restricted stock awards contain non-forfeitable rights to dividends, and accordingly, these awards are deemed to be participating securities. Therefore, the Company applies the two-class method to calculate basic and diluted earnings. Under the two-class method, we allocate net income attributable to stockholders to common stockholders and holders of unvested restricted stock by using the weighted-average shares of each class outstanding for quarter-to-date and year-to-date periods, based on their respective participation rights to dividends declared and undistributed earnings. Basic earnings per common share is computed by dividing net income attributable to common stockholders by the weighted average number of shares of common stock outstanding during the period. Diluted earnings per common share reflects the effect of dilutive securities

Recent Accounting Pronouncements

In November 2023, the Financial Accounting Standards Board issued Accounting Standard Update (“ASU”) 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. The ASU enhances segment disclosures by requiring public entities to provide investors with additional, more detailed information about a reportable segment’s expenses. The ASU also requires disclosure of the chief operating decision maker’s (“CODM”) title and position on an annual basis, as well as an explanation of how the CODM uses the reported measures and other disclosures. The amendment is effective for the Company for the year ending December 31, 2024. We are currently evaluating the impact of this standard on our consolidated financial statements and related disclosures.