Accounting Policies and Related Matters (Policies)	12 Months Ended
Dec. 31, 2019
Accounting Policies [Abstract]
Use of Estimates	Use of Estimates The preparation of the consolidated financial statements in conformity with U.S. generally accepted accounting principles (“U.S. GAAP”) requires us to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates.
Principles of Consolidation	Principles of Consolidation The consolidated financial statements include the accounts of our wholly-owned subsidiaries and joint venture (“JV”) entities that we control, through voting rights or other means. All material intercompany transactions and balances have been eliminated in consolidation. At inception of JV transactions, we identify entities for which control is achieved through means other than voting rights (“variable interest entities” or “VIEs”) and determine which business enterprise is the primary beneficiary of its operations. A VIE is broadly defined as an entity where either (i) the equity investors as a group, if any, do not have a controlling financial interest, or (ii) the equity investment at risk is insufficient to finance that entity’s activities without additional subordinated financial support. We consolidate investments in VIEs when we are determined to be the primary beneficiary. Accounting Standards Codification Topic 810, Consolidations (“ASC 810”), requires enterprises to perform a qualitative approach to determining whether or not a VIE will need to be consolidated. This evaluation is based on an enterprise’s ability to direct and influence the activities of a VIE that most significantly impact that entity’s economic performance. For investments in JVs, U.S. GAAP may preclude consolidation by the sole general partner in certain circumstances based on the type of rights held by the limited partner(s). We assess the limited partners’ rights and their impact on our consolidation conclusions, and we reassess if there is a change to the terms or in the exercisability of the rights of the limited partners, the sole general partner increases or decreases its ownership of limited partnership interests, or there is an increase or decrease in the number of outstanding limited partnership interests. We similarly evaluate the rights of managing members of limited liability companies.
Revenue Recognition	Revenue Recognition For our Triple-net and Outpatient Medical segments, a significant source of our revenue is generated through leasing arrangements. Leases with fixed annual rental escalators are generally recognized on a straight-line basis over the initial lease period, subject to a collectability assessment. Rental income related to leases with contingent rental escalators is generally recorded based on the contractual cash rental payments due for the period. Leases in our Outpatient Medical portfolio typically include some form of operating expense reimbursement by the tenant. Certain payments made to operators are treated as lease incentives and amortized as a reduction of revenue over the lease term. For our Seniors Housing Operating segment, revenue from resident fees and services is predominantly service-based, and generally are recognized monthly as services are provided. Agreements with residents generally have a term of one year and are cancelable by the resident with 30 days’ notice. Management contracts are present in some of our joint venture agreements to provide asset and property management, leasing, marketing and other services. Interest income on loans is recognized as earned based upon the principal amount outstanding subject to an evaluation of collectability risk. We recognize gains on the disposition of real estate when the recognition criteria have been met, generally at the time the risks and rewards and title have transferred and we no longer have substantial continuing involvement with the real estate sold. We recognize losses from disposition of real estate when known.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash and cash equivalents consist of all highly liquid investments with an original maturity of three months or less.
Restricted Cash	Restricted Cash Restricted cash primarily consists of amounts held by lenders to provide future payments for real estate taxes, insurance, tenant and capital improvements, amounts held in escrow relating to transactions we are entitled to receive over a period of time as outlined in the escrow agreement and net proceeds from property sales that were executed as tax-deferred dispositions under Internal Revenue Code (“IRC”) section 1031.
Deferred Loan Expenses	Deferred Loan Expenses Deferred loan expenses are costs incurred by us in connection with the issuance, assumption and amendments of debt arrangements. Deferred loan expenses related to debt instruments, excluding the primary unsecured credit facility, are recorded as a reduction of the related debt liability. Deferred loan expenses related to the primary unsecured credit facility are included in other assets. We amortize these costs over the term of the debt using the straight-line method, which approximates the effective interest method.
Investments in Unconsolidated Entities	Investments in Unconsolidated Entities Investments in entities that we do not consolidate but have the ability to exercise significant influence over operating and financial policies are reported under the equity method of accounting. Under the equity method, our share of the investee’s earnings or losses is included in our consolidated results of operations. The initial carrying value of investments in unconsolidated entities is based on the amount paid to purchase the entity interest inclusive of transaction costs. To the extent that our cost basis is different from the basis reflected at the entity level, the basis difference is generally amortized over the lives of the related assets and liabilities, and such amortization is included in our share of equity in earnings of the entity. We evaluate our equity method investments for impairment based upon a comparison of the estimated fair value of the equity method investment to its carrying value. When we determine a decline in the estimated fair value of such an investment below its carrying value is other-than-temporary, an impairment is recorded.
Equity Securities	Equity Securities Equity securities are measured at fair value with gains and losses recognized in loss (gain) on derivatives and financial instruments, net in the Consolidated Statements of Comprehensive Income.
Redeemable Noncontrolling Interests	Redeemable Noncontrolling Interests Certain noncontrolling interests are redeemable at fair value. Accordingly, we record the carrying amount of the noncontrolling interests at the greater of (i) the initial carrying amount, increased or decreased for the noncontrolling interest’s share of net income or loss and its share of other comprehensive income or loss, and dividends or (ii) the redemption value. If it is probable that the interests will be redeemed in the future, we accrete the carrying value to the redemption value over the period until expected redemption, currently a weighted-average period of approximately one year. In accordance with ASC 810, the redeemable noncontrolling interests are classified outside of permanent equity, as a mezzanine item, in the balance sheet. At December 31, 2019, the current redemption value of redeemable noncontrolling interests exceeded the carrying value of $475,877,000 by $14,953,000. We entered into certain DownREIT partnerships which give a real estate seller the ability to exchange its property on a tax deferred basis for equity membership interests (“OP units”). The OP units may be redeemed any time following the first anniversary of the date of issuance at the election of the holders for one share of our common stock per unit or, at our option, cash.
Real Property Owned	Real Property Owned Real estate acquisitions are generally classified as asset acquisitions for which we record tangible assets and identifiable intangible assets and liabilities at cost on a relative fair value basis. Liabilities assumed and any associated noncontrolling interests are reflected at fair value. Tangible assets primarily consist of land, buildings and improvements. Identifiable intangible assets and liabilities consist primarily of the above or below market component of in-place leases and the value associated with the presence of in-place leases. The value allocable to the above or below market component of the acquired in-place lease is determined based upon the present value (using a discount rate which reflects the risks associated with the acquired leases) of the difference between (i) the contractual amounts to be paid pursuant to the lease over its remaining term, and (ii) management’s estimate of the amounts that would be paid using fair market rates over the remaining term of the lease. The amounts allocated to above market leases are included in acquired lease intangibles and below market leases are included in other liabilities in the balance sheet and are amortized to rental income over the remaining terms of the respective leases or lease-up period. The total amount of other intangible assets acquired is further allocated to in-place lease values and customer relationship values for in-place tenants based on management’s evaluation of the specific characteristics of each tenant’s lease and our overall relationship with that respective tenant. Characteristics considered by management in allocating these values include the nature and extent of our existing business relationships with the tenant, growth prospects for developing new business with the tenant, the tenant’s credit quality and expectations of lease renewals, among other factors. The total amount of other intangible assets acquired is further allocated to in-place lease values for in-place residents with such value representing (i) value associated with lost revenue related to tenant reimbursable operating costs that would be incurred in an assumed re-leasing period, and (ii) value associated with lost rental revenue from existing leases during an assumed re-leasing period. This intangible asset is amortized over the remaining life of the lease or the assumed re-leasing period. Real property developed by us is recorded at cost, including the capitalization of construction period interest. These properties are depreciated on a straight-line basis over their estimated useful lives which range from 15 to 40 years for buildings and 5 to 15 years for improvements. We consider costs incurred in conjunction with re-leasing properties, including tenant improvements and lease commissions, to represent the acquisition of productive assets and, accordingly, such costs are reflected as investment activities in our Consolidated Statement of Cash Flows. The net book value of long-lived assets is reviewed quarterly on a property by property basis to determine if facts and circumstances suggest that the assets may be impaired or that the depreciable life may need to be changed. We consider external factors relating to each asset and the existence of a master lease which may link the cash flows of an individual asset to a larger portfolio of assets leased to the same tenant. If these factors and the projected undiscounted cash flows of the assets over the remaining depreciation period indicate that the assets will not be recoverable, the carrying value is reduced to the estimated fair market value. In addition, we are exposed to the risks inherent in concentrating investments in real estate, and in particular, the seniors housing and health care industries. A downturn in the real estate industry could adversely affect the value of our properties and our ability to sell properties for a price or on terms acceptable to us. Additionally, properties that meet the held for sale criteria are recorded at the lessor of fair value less costs to sell or the carrying value. Expenditures for repairs and maintenance are expens
Capitalization of Construction Period Interest	Capitalization of Construction Period Interest We capitalize interest costs associated with funds used for the construction of properties owned by us. The amount capitalized is based upon the balance outstanding during the construction period using the rate of interest which approximates our company-wide cost of financing. Our interest expense reflected in the Consolidated Statements of Comprehensive Income has been reduced by the amounts capitalized.
Loans Receivable	Loans Receivable Loans receivable are recorded on our Consolidated Balance Sheets in real estate loans receivable, net of allowance, or for non real estate loans receivable, in receivables and other assets. Real estate loans receivable consists of mortgage loans and other real estate loans which are primarily collateralized by a first, second or third mortgage lien, a leasehold mortgage on, or an assignment of the partnership interest in, the related properties, corporate guarantees and/or personal guarantees. Non real estate loans are generally corporate loans with no real estate backing. Interest income on loans is recognized as earned based upon the principal amount outstanding subject to an evaluation of collectability risks.
In Substance Real Estate Investments	In Substance Real Estate Investments We provide loans to third parties for the acquisition, development and construction of real estate. Under these arrangements, it is possible that we will participate in the expected residual profits of the project through the sale, refinancing or acquisition of the property. We evaluate the characteristics of each arrangement, including its risks and rewards, to determine whether they are more similar to those associated with a loan or an investment in real estate. Arrangements with characteristics implying loan classification are presented as real estate loans receivable and result in the recognition of interest income. Arrangements with characteristics implying real estate joint ventures are treated as in substance real estate investments and presented as investments in unconsolidated entities and are accounted for using the equity method. The classification of each arrangement as either a real estate loan receivable or investment in unconsolidated entity involves judgment and relies on various factors, including market conditions, amount and timing of expected residual profits, credit enhancements in the form of guarantees, estimated fair value of the collateral, and significance of borrower equity in the project, among others. The classification of such arrangements is performed at inception, and periodically reassessed when significant changes occur in the circumstances or conditions described above.
Allowance for Losses on Loans Receivable	Allowance for Losses on Loans Receivable The allowance for losses on loans receivable is maintained at a level believed adequate to absorb potential losses in our loans receivable. The determination of the allowance is based on a quarterly evaluation of these loans, including general economic conditions and estimated collectability of loan payments. We evaluate the collectability of our loans receivable based on a combination of factors, including, but not limited to, delinquency status, historical loan charge-offs, financial strength of the borrower and guarantors, and value of the underlying collateral. If such factors indicate that there is greater risk of loan charge-offs, additional allowances or placement on non-accrual status may be required. A loan is impaired when, based on current information and events, it is probable that we will be unable to collect all amounts due as scheduled according to the contractual terms of the original loan agreement. Consistent with this definition, all loans on non-accrual are deemed impaired. To the extent circumstances improve and the risk of collectability is diminished, we will return these loans to income accrual status. While a loan is on non-accrual status, any cash receipts are applied against the outstanding principal balance. Any loans with collectability concerns are subjected to a projected payoff valuation. The valuation is based on the expected future cash flows and/or the estimated fair value of the underlying collateral. The valuation is compared to the outstanding balance to determine the reserve needed for each loan. We may base our valuation on a loan’s observable market price, if any, or the fair value of collateral, net of sales costs, if the repayment of the loan is expected to be provided solely by the collateral.
Goodwill	Goodwill Goodwill is tested annually for impairment and is tested for impairment more frequently if events and circumstances indicate that the asset might be impaired. An impairment loss is recognized to the extent that the carrying amount, including goodwill, exceeds the reporting unit’s fair value and the implied fair value of goodwill is less than the carrying amount of that goodwill. We have not had any goodwill impairments.
Fair Value of Derivative Instruments	Fair Value of Derivative Instruments Derivatives are recorded at fair value on the balance sheet as assets or liabilities. The valuation of derivative instruments requires us to make estimates and judgments that affect the fair value of the instruments. Fair values of our derivatives are estimated by pricing models that consider the forward yield curves and discount rates. The fair value of our forward exchange contracts are estimated by pricing models that consider foreign currency spot rates, forward trade rates and discount rates. Such amounts and the recognition of such amounts are subject to significant estimates that may change in the future. See Note 12 for additional information.
Federal Income Tax	Federal Income Tax We have elected to be treated as a REIT under the applicable provisions of the IRC, commencing with our first taxable year, and made no provision for U.S. federal income tax purposes prior to our acquisition of our taxable REIT subsidiaries (“TRSs”). As a result of these as well as subsequent acquisitions, we now record income tax expense or benefit with respect to certain of our entities that are taxed as TRSs under provisions similar to those applicable to regular corporations and not under the REIT provisions. We account for deferred income taxes using the asset and liability method and recognize deferred tax assets and liabilities for the expected future tax consequences of events that have been included in our consolidated financial statements or tax returns. Under this method, we determine deferred tax assets and liabilities based on the differences between the financial reporting and tax bases of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. Any increase or decrease in the deferred tax liability that results from a change in circumstances, and that causes a change in our judgment about expected future tax consequences of events, is included in the tax provision when such changes occur. Deferred income taxes also reflect the impact of operating loss and tax credit carryforwards. A valuation allowance is provided if we believe it is more likely than not that all or some portion of the deferred tax asset will not be realized. Any increase or decrease in the valuation allowance that results from a change in circumstances, and that causes a change in our judgment about the realizability of the related deferred tax asset, is included in the tax provision when such changes occur. See Note 19 for additional information.
Foreign Currency	Foreign Currency Certain of our subsidiaries’ functional currencies are the local currencies of their respective countries. We translate the results of operations of our foreign subsidiaries into U.S. Dollars using average rates of exchange in effect during the period, and we translate balance sheet accounts using exchange rates in effect at the end of the period. We record resulting currency translation adjustments in accumulated other comprehensive income, a component of stockholders’ equity, on our Consolidated Balance Sheets.
Earnings Per Share	Earnings Per Share Basic earnings per share is computed by dividing net income available to common stockholders by the weighted-average number of shares outstanding for the period adjusted for non-vested shares of restricted stock. The computation of diluted earnings per share is similar to basic earnings per share, except that the number of shares is increased to include the number of additional common shares that would have been outstanding if the potentially dilutive common shares had been issued.
Reclassifications	Reclassifications Certain amounts in prior years have been reclassified to conform to current year presentation.
New Accounting Standards	New Accounting Standards We adopted Accounting Standards Update ("ASU") 2016-02, Leases (Topic 842) ("ASC 842") which requires lessees to recognize assets and liabilities on their Consolidated Balance Sheet related to the rights and obligations created by most leases, while continuing to recognize expenses on their Consolidated Statement of Comprehensive Income over the lease term. We adopted ASC 842 as of January 1, 2019, using the modified retrospective approach and have elected the package of practical expedients permitted under the transition guidance within the new standard, which among other things, permits us to carry forward our prior conclusions for lease classification and initial direct costs on existing leases. We also made an accounting policy election to keep short-term leases less than twelve months off the balance sheet for all classes of underlying assets. In July 2018, the Financial Accounting Standards Board ("FASB") issued ASU 2018-11 "Leases (Topic 842): Targeted Improvements" that (1) simplifies transition requirements for both lessees and lessors by adding an option that permits entities to apply the transition provisions of the new standard at its adoption date instead of at the earliest comparative period presented in its financial statements and (2) allows lessors to elect, as a practical expedient, to not separate lease and non-lease components in a contract, and instead to account for as a single lease component, if certain criteria are met. This practical expedient causes an entity to assess whether a contract is predominantly lease or service-based and recognize the entire contract under the relevant accounting guidance (e.g. predominantly lease-based would be accounted for under ASC 842 and predominantly service-based would be accounted for under ASU 2014-09, "Revenue from Contracts with Customers (ASC 606)"). For the year ended December 31, 2018, we recognized revenue for our Seniors Housing Operating resident agreements in accordance with the provisions of the prior lease guidance, ASC 840, "Leases". Upon adoption of ASC 842, we elected the lessor practical expedient described above and recognized our revenue for our Seniors Housing Operating segment based upon the predominant component, generally the non-lease service component. Therefore, beginning on January 1, 2019, we accounted for the majority of such resident agreements under ASC 606. The timing and pattern of revenue recognition is substantially the same as that prior to adoption. The FASB also issued ASU 2018-20 "Leases (Topic 842): Narrow Improvements for Lessors", which provides lessors the ability to make an accounting policy election not to evaluate whether certain sales taxes and other similar taxes imposed by a governmental authority on a specific lease revenue-producing transaction are the primary obligation of the lessor as owner of the underlying leased asset. A lessor that makes this election will exclude these taxes from the measurement of lease revenue and the associated expense. Upon adoption of ASC 842, we utilized this practical expedient in instances in which real estate taxes are paid directly by our tenants to taxing authorities. For triple-net leasing arrangements in which the tenant remits payment for real estate taxes to us and we pay the taxing authority, we have included the associated revenue and expense in rental income and property operating expenses on the Consolidated Statements of Comprehensive Income. This reporting had no impact on our net income. For leases in which the Company is the lessee, primarily consisting of ground leases and various office and equipment leases, we recognized upon adoption a right of use asset of $509,386,000 which included the present value of minimum leases payments, existing above and/or below market lease intangible values and existing straight-line rent liabilities associated with such leases. We also recognized operating lease liabilities of $357,070,000. The standard did not materially impact our Consolidated Statements of Comprehensive Income or our Consolidated Statement of Cash Flows. See Note 6 for additional details. In 2016, the FASB issued ASU 2016-13, “Measurement of Credit Losses on Financial Instruments.” This standard requires a new forward-looking “expected loss” model to be used for receivables, held-to-maturity debt, loans receivable, and other instruments. In November 2018, the FASB issued an amendment excluding operating lease receivables accounted for under the new leases standard from the scope of the new credit loss standard. ASU 2016-13 is effective for the Company on January 1, 2020. We have continued our implementation efforts, including data collection and processing, model development and validation, and establishment of the governance and control processes. We currently do not believe that the adoption of this new guidance will have a material impact on our consolidated financial statements.
Segment Reporting	We evaluate our business and make resource allocations on our three operating segments: Seniors Housing Operating, Triple-net and Outpatient Medical. Our Seniors Housing Operating properties include seniors apartments, assisted living, independent living/continuing care retirement communities, independent support living (Canada), care homes with and without nursing (U.K.) and combinations thereof that are owned and/or operated through RIDEA structures (see Note 19). Our Triple-net properties include the property types described above as well as long-term/post-acute care facilities. Under the Triple-net segment, we invest in seniors housing and health care real estate through acquisition and financing of primarily single tenant properties. Properties acquired are primarily leased under triple-net leases and we are not involved in the management of the property. Our Outpatient Medical properties include outpatient medical buildings which are typically leased to multiple tenants and generally require a certain level of property management by us. We evaluate performance based upon NOI of each segment. We define NOI as total revenues, including tenant reimbursements, less property operating expenses. We believe NOI provides investors relevant and useful information because it measures the operating performance of our properties at the property level on an unleveraged basis. We use NOI to make decisions about resource allocations and to assess the property level performance of our properties. Non-segment revenue consists mainly of interest income on certain non-real estate investments and other income. Non-segment assets consist of corporate assets including cash, deferred loan expenses and corporate offices and equipment among others. Non-property specific revenues and expenses are not allocated to individual segments in determining NOI. The accounting policies of the segments are the same as those described in the summary of significant accounting policies (see Note 2). The results of operations for all acquisitions described in Note 3 are included in our consolidated results of operations from the acquisition dates and are components of the appropriate segments.

Accounting Policies and Related Matters (Policies)

12 Months Ended

Dec. 31, 2019

The preparation of the consolidated financial statements in conformity with U.S. generally accepted accounting principles (“U.S. GAAP”) requires us to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results could differ from those estimates.

Principles of Consolidation

The consolidated financial statements include the accounts of our wholly-owned subsidiaries and joint venture (“JV”) entities that we control, through voting rights or other means. All material intercompany transactions and balances have been eliminated in consolidation. At inception of JV transactions, we identify entities for which control is achieved through means other than voting rights (“variable interest entities” or “VIEs”) and determine which business enterprise is the primary beneficiary of its operations. A VIE is broadly defined as an entity where either (i) the equity investors as a group, if any, do not have a controlling financial interest, or (ii) the equity investment at risk is insufficient to finance that entity’s activities without additional subordinated financial support. We consolidate investments in VIEs when we are determined to be the primary beneficiary. Accounting Standards Codification Topic 810, Consolidations (“ASC 810”), requires enterprises to perform a qualitative approach to determining whether or not a VIE will need to be consolidated. This evaluation is based on an enterprise’s ability to direct and influence the activities of a VIE that most significantly impact that entity’s economic performance. For investments in JVs, U.S. GAAP may preclude consolidation by the sole general partner in certain circumstances based on the type of rights held by the limited partner(s). We assess the limited partners’ rights and their impact on our consolidation conclusions, and we reassess if there is a change to the terms or in the exercisability of the rights of the limited partners, the sole general partner increases or decreases its ownership of limited partnership interests, or there is an increase or decrease in the number of outstanding limited partnership interests. We similarly evaluate the rights of managing members of limited liability companies.

Revenue Recognition

For our Triple-net and Outpatient Medical segments, a significant source of our revenue is generated through leasing arrangements. Leases with fixed annual rental escalators are generally recognized on a straight-line basis over the initial lease period, subject to a collectability assessment. Rental income related to leases with contingent rental escalators is generally recorded based on the contractual cash rental payments due for the period. Leases in our Outpatient Medical portfolio typically include some form of operating expense reimbursement by the tenant. Certain payments made to operators are treated as lease incentives and amortized as a reduction of revenue over the lease term.

For our Seniors Housing Operating segment, revenue from resident fees and services is predominantly service-based, and generally are recognized monthly as services are provided. Agreements with residents generally have a term of one year and are cancelable by the resident with 30 days’ notice. Management contracts are present in some of our joint venture agreements to provide asset and property management, leasing, marketing and other services.

Interest income on loans is recognized as earned based upon the principal amount outstanding subject to an evaluation of collectability risk.

We recognize gains on the disposition of real estate when the recognition criteria have been met, generally at the time the risks and rewards and title have transferred and we no longer have substantial continuing involvement with the real estate sold. We recognize losses from disposition of real estate when known.

Cash and Cash Equivalents

Cash and cash equivalents consist of all highly liquid investments with an original maturity of three months or less.

Restricted Cash

Restricted cash primarily consists of amounts held by lenders to provide future payments for real estate taxes, insurance, tenant and capital improvements, amounts held in escrow relating to transactions we are entitled to receive over a period of time as outlined in the escrow agreement and net proceeds from property sales that were executed as tax-deferred dispositions under Internal Revenue Code (“IRC”) section 1031.

Deferred Loan Expenses

Deferred loan expenses are costs incurred by us in connection with the issuance, assumption and amendments of debt arrangements. Deferred loan expenses related to debt instruments, excluding the primary unsecured credit facility, are recorded as a reduction of the related debt liability. Deferred loan expenses related to the primary unsecured credit facility are included in other assets. We amortize these costs over the term of the debt using the straight-line method, which approximates the effective interest method.

Investments in Unconsolidated Entities

Investments in entities that we do not consolidate but have the ability to exercise significant influence over operating and financial policies are reported under the equity method of accounting. Under the equity method, our share of the investee’s earnings or losses is included in our consolidated results of operations. The initial carrying value of investments in unconsolidated entities is based on the amount paid to purchase the entity interest inclusive of transaction costs. To the extent that our cost basis is different from the basis reflected at the entity level, the basis difference is generally amortized over the lives of the related assets and liabilities, and such amortization is included in our share of equity in earnings of the entity. We evaluate our equity method investments for impairment based upon a comparison of the estimated fair value of the equity method investment to its carrying value. When we determine a decline in the estimated fair value of such an investment below its carrying value is other-than-temporary, an impairment is recorded.

Equity Securities

Equity securities are measured at fair value with gains and losses recognized in loss (gain) on derivatives and financial instruments, net in the Consolidated Statements of Comprehensive Income.

Redeemable Noncontrolling Interests

Certain noncontrolling interests are redeemable at fair value. Accordingly, we record the carrying amount of the noncontrolling interests at the greater of (i) the initial carrying amount, increased or decreased for the noncontrolling interest’s share of net income or loss and its share of other comprehensive income or loss, and dividends or (ii) the redemption value. If it is probable that the interests will be redeemed in the future, we accrete the carrying value to the redemption value over the period until expected redemption, currently a weighted-average period of approximately one year. In accordance with ASC 810, the redeemable noncontrolling interests are classified outside of permanent equity, as a mezzanine item, in the balance sheet. At December 31, 2019, the current redemption value of redeemable noncontrolling interests exceeded the carrying value of $475,877,000 by $14,953,000.

We entered into certain DownREIT partnerships which give a real estate seller the ability to exchange its property on a tax deferred basis for equity membership interests (“OP units”). The OP units may be redeemed any time following the first anniversary of the date of issuance at the election of the holders for one share of our common stock per unit or, at our option, cash.

Real Property Owned

Real estate acquisitions are generally classified as asset acquisitions for which we record tangible assets and identifiable intangible assets and liabilities at cost on a relative fair value basis. Liabilities assumed and any associated noncontrolling interests are reflected at fair value. Tangible assets primarily consist of land, buildings and improvements.

Identifiable intangible assets and liabilities consist primarily of the above or below market component of in-place leases and the value associated with the presence of in-place leases. The value allocable to the above or below market component of the acquired in-place lease is determined based upon the present value (using a discount rate which reflects the risks associated with the acquired leases) of the difference between (i) the contractual amounts to be paid pursuant to the lease over its remaining term, and (ii) management’s estimate of the amounts that would be paid using fair market rates over the remaining term of the lease. The amounts allocated to above market leases are included in acquired lease intangibles and below market leases are included in other liabilities in the balance sheet and are amortized to rental income over the remaining terms of the respective leases or lease-up period.

The total amount of other intangible assets acquired is further allocated to in-place lease values and customer relationship values for in-place tenants based on management’s evaluation of the specific characteristics of each tenant’s lease and our overall relationship with that respective tenant. Characteristics considered by management in allocating these values include the nature and extent of our existing business relationships with the tenant, growth prospects for developing new business with the tenant, the tenant’s credit quality and expectations of lease renewals, among other factors. The total amount of other intangible assets acquired is further allocated to in-place lease values for in-place residents with such value representing (i) value associated with lost revenue related to tenant reimbursable operating costs that would be incurred in an assumed re-leasing period, and (ii) value associated with lost rental revenue from existing leases during an assumed re-leasing period. This intangible asset is amortized over the remaining life of the lease or the assumed re-leasing period.

Real property developed by us is recorded at cost, including the capitalization of construction period interest. These properties are depreciated on a straight-line basis over their estimated useful lives which range from 15 to 40 years for buildings and 5 to 15 years for improvements. We consider costs incurred in conjunction with re-leasing properties, including tenant improvements and lease commissions, to represent the acquisition of productive assets and, accordingly, such costs are reflected as investment activities in our Consolidated Statement of Cash Flows.

The net book value of long-lived assets is reviewed quarterly on a property by property basis to determine if facts and circumstances suggest that the assets may be impaired or that the depreciable life may need to be changed. We consider external factors relating to each asset and the existence of a master lease which may link the cash flows of an individual asset to a larger portfolio of assets leased to the same tenant. If these factors and the projected undiscounted cash flows of the assets over the remaining depreciation period indicate that the assets will not be recoverable, the carrying value is reduced to the estimated fair market value. In addition, we are exposed to the risks inherent in concentrating investments in real estate, and in particular, the seniors housing and health care industries. A downturn in the real estate industry could adversely affect the value of our properties and our ability to sell properties for a price or on terms acceptable to us. Additionally, properties that meet the held for sale criteria are recorded at the lessor of fair value less costs to sell or the carrying value.

Expenditures for repairs and maintenance are expens

Capitalization of Construction Period Interest

We capitalize interest costs associated with funds used for the construction of properties owned by us. The amount capitalized is based upon the balance outstanding during the construction period using the rate of interest which approximates our company-wide cost of financing. Our interest expense reflected in the Consolidated Statements of Comprehensive Income has been reduced by the amounts capitalized.

Loans Receivable

Loans receivable are recorded on our Consolidated Balance Sheets in real estate loans receivable, net of allowance, or for non real estate loans receivable, in receivables and other assets. Real estate loans receivable consists of mortgage loans and other real estate loans which are primarily collateralized by a first, second or third mortgage lien, a leasehold mortgage on, or an assignment of the partnership interest in, the related properties, corporate guarantees and/or personal guarantees. Non real estate loans are generally corporate loans with no real estate backing. Interest income on loans is recognized as earned based upon the principal amount outstanding subject to an evaluation of collectability risks.

In Substance Real Estate Investments

We provide loans to third parties for the acquisition, development and construction of real estate. Under these arrangements, it is possible that we will participate in the expected residual profits of the project through the sale, refinancing or acquisition of the property. We evaluate the characteristics of each arrangement, including its risks and rewards, to determine whether they are more similar to those associated with a loan or an investment in real estate. Arrangements with characteristics implying loan classification are presented as real estate loans receivable and result in the recognition of interest income. Arrangements with characteristics implying real estate joint ventures are treated as in substance real estate investments and presented as investments in unconsolidated entities and are accounted for using the equity method. The classification of each arrangement as either a real estate loan receivable or investment in unconsolidated entity involves judgment and relies on various factors, including market conditions, amount and timing of expected residual profits, credit enhancements in the form of guarantees, estimated fair value of the collateral, and significance of borrower equity in the project, among others. The classification of such arrangements is performed at inception, and periodically reassessed when significant changes occur in the circumstances or conditions described above.

Allowance for Losses on Loans Receivable

The allowance for losses on loans receivable is maintained at a level believed adequate to absorb potential losses in our loans receivable. The determination of the allowance is based on a quarterly evaluation of these loans, including general economic conditions and estimated collectability of loan payments. We evaluate the collectability of our loans receivable based on a combination of factors, including, but not limited to, delinquency status, historical loan charge-offs, financial strength of the borrower and guarantors, and value of the underlying collateral. If such factors indicate that there is greater risk of loan charge-offs, additional allowances or placement on non-accrual status may be required. A loan is impaired when, based on current information and events, it is probable that we will be unable to collect all amounts due as scheduled according to the contractual terms of the original loan agreement. Consistent with this definition, all loans on non-accrual are deemed impaired. To the extent circumstances improve and the risk of collectability is diminished, we will return these loans to income accrual status. While a loan is on non-accrual status, any cash receipts are applied against the outstanding principal balance. Any loans with collectability concerns are subjected to a projected payoff valuation. The valuation is based on the expected future cash flows and/or the estimated fair value of the underlying collateral. The valuation is compared to the outstanding balance to determine the reserve needed for each loan. We may base our valuation on a loan’s observable market price, if any, or the fair value of collateral, net of sales costs, if the repayment of the loan is expected to be provided solely by the collateral.

Goodwill

Goodwill is tested annually for impairment and is tested for impairment more frequently if events and circumstances indicate that the asset might be impaired. An impairment loss is recognized to the extent that the carrying amount, including goodwill, exceeds the reporting unit’s fair value and the implied fair value of goodwill is less than the carrying amount of that goodwill. We have not had any goodwill impairments.

Fair Value of Derivative Instruments

Derivatives are recorded at fair value on the balance sheet as assets or liabilities. The valuation of derivative instruments requires us to make estimates and judgments that affect the fair value of the instruments. Fair values of our derivatives are estimated by pricing models that consider the forward yield curves and discount rates. The fair value of our forward exchange contracts are estimated by pricing models that consider foreign currency spot rates, forward trade rates and discount rates. Such amounts and the recognition of such amounts are subject to significant estimates that may change in the future. See Note 12 for additional information.

Federal Income Tax

We have elected to be treated as a REIT under the applicable provisions of the IRC, commencing with our first taxable year, and made no provision for U.S. federal income tax purposes prior to our acquisition of our taxable REIT subsidiaries (“TRSs”). As a result of these as well as subsequent acquisitions, we now record income tax expense or benefit with respect to certain of our entities that are taxed as TRSs under provisions similar to those applicable to regular corporations and not under the REIT provisions. We account for deferred income taxes using the asset and liability method and recognize deferred tax assets and liabilities for the expected future tax consequences of events that have been included in our consolidated financial statements or tax returns. Under this method, we determine deferred tax assets and liabilities based on the differences between the financial reporting and tax bases of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. Any increase or decrease in the deferred tax liability that results from a change in circumstances, and that causes a change in our judgment about expected future tax consequences of events, is included in the tax provision when such changes occur. Deferred income taxes also reflect the impact of operating loss and tax credit carryforwards. A valuation allowance is provided if we believe it is more likely than not that all or some portion of the deferred tax asset will not be realized. Any increase or decrease in the valuation allowance that results from a change in circumstances, and that causes a change in our judgment about the realizability of the related deferred tax asset, is included in the tax provision when such changes occur. See Note 19 for additional information.

Foreign Currency

Certain of our subsidiaries’ functional currencies are the local currencies of their respective countries. We translate the results of operations of our foreign subsidiaries into U.S. Dollars using average rates of exchange in effect during the period, and we translate balance sheet accounts using exchange rates in effect at the end of the period. We record resulting currency translation adjustments in accumulated other comprehensive income, a component of stockholders’ equity, on our Consolidated Balance Sheets.

Earnings Per Share

Basic earnings per share is computed by dividing net income available to common stockholders by the weighted-average number of shares outstanding for the period adjusted for non-vested shares of restricted stock. The computation of diluted earnings per share is similar to basic earnings per share, except that the number of shares is increased to include the number of additional common shares that would have been outstanding if the potentially dilutive common shares had been issued.

Reclassifications

Certain amounts in prior years have been reclassified to conform to current year presentation.

New Accounting Standards

We adopted Accounting Standards Update ("ASU") 2016-02, Leases (Topic 842) ("ASC 842") which requires lessees to recognize assets and liabilities on their Consolidated Balance Sheet related to the rights and obligations created by most leases, while continuing to recognize expenses on their Consolidated Statement of Comprehensive Income over the lease term. We adopted ASC 842 as of January 1, 2019, using the modified retrospective approach and have elected the package of practical expedients permitted under the transition guidance within the new standard, which among other things, permits us to carry forward our prior conclusions for lease classification and initial direct costs on existing leases. We also made an accounting policy election to keep short-term leases less than twelve months off the balance sheet for all classes of underlying assets.

In July 2018, the Financial Accounting Standards Board ("FASB") issued ASU 2018-11 "Leases (Topic 842): Targeted Improvements" that (1) simplifies transition requirements for both lessees and lessors by adding an option that permits entities to apply the transition provisions of the new standard at its adoption date instead of at the earliest comparative period presented in its financial statements and (2) allows lessors to elect, as a practical expedient, to not separate lease and non-lease components in

a contract, and instead to account for as a single lease component, if certain criteria are met. This practical expedient causes an entity to assess whether a contract is predominantly lease or service-based and recognize the entire contract under the relevant accounting guidance (e.g. predominantly lease-based would be accounted for under ASC 842 and predominantly service-based would be accounted for under ASU 2014-09, "Revenue from Contracts with Customers (ASC 606)"). For the year ended December 31, 2018, we recognized revenue for our Seniors Housing Operating resident agreements in accordance with the provisions of the prior lease guidance, ASC 840, "Leases". Upon adoption of ASC 842, we elected the lessor practical expedient described above and recognized our revenue for our Seniors Housing Operating segment based upon the predominant component, generally the non-lease service component. Therefore, beginning on January 1, 2019, we accounted for the majority of such resident agreements under ASC 606. The timing and pattern of revenue recognition is substantially the same as that prior to adoption.

The FASB also issued ASU 2018-20 "Leases (Topic 842): Narrow Improvements for Lessors", which provides lessors the ability to make an accounting policy election not to evaluate whether certain sales taxes and other similar taxes imposed by a governmental authority on a specific lease revenue-producing transaction are the primary obligation of the lessor as owner of the underlying leased asset. A lessor that makes this election will exclude these taxes from the measurement of lease revenue and the associated expense. Upon adoption of ASC 842, we utilized this practical expedient in instances in which real estate taxes are paid directly by our tenants to taxing authorities. For triple-net leasing arrangements in which the tenant remits payment for real estate taxes to us and we pay the taxing authority, we have included the associated revenue and expense in rental income and property operating expenses on the Consolidated Statements of Comprehensive Income. This reporting had no impact on our net income.

For leases in which the Company is the lessee, primarily consisting of ground leases and various office and equipment leases, we recognized upon adoption a right of use asset of $509,386,000 which included the present value of minimum leases payments, existing above and/or below market lease intangible values and existing straight-line rent liabilities associated with such leases. We also recognized operating lease liabilities of $357,070,000. The standard did not materially impact our Consolidated Statements of Comprehensive Income or our Consolidated Statement of Cash Flows. See Note 6 for additional details.

In 2016, the FASB issued ASU 2016-13, “Measurement of Credit Losses on Financial Instruments.” This standard requires a new forward-looking “expected loss” model to be used for receivables, held-to-maturity debt, loans receivable, and other instruments. In November 2018, the FASB issued an amendment excluding operating lease receivables accounted for under the new leases standard from the scope of the new credit loss standard. ASU 2016-13 is effective for the Company on January 1, 2020.

We have continued our implementation efforts, including data collection and processing, model development and validation, and establishment of the governance and control processes. We currently do not believe that the adoption of this new guidance will have a material impact on our consolidated financial statements.

Segment Reporting

We evaluate our business and make resource allocations on our three operating segments: Seniors Housing Operating, Triple-net and Outpatient Medical. Our Seniors Housing Operating properties include seniors apartments, assisted living, independent living/continuing care retirement communities, independent support living (Canada), care homes with and without nursing (U.K.) and combinations thereof that are owned and/or operated through RIDEA structures (see Note 19). Our Triple-net properties include the property types described above as well as long-term/post-acute care facilities. Under the Triple-net segment, we invest in seniors housing and health care real estate through acquisition and financing of primarily single tenant properties. Properties acquired are primarily leased under triple-net leases and we are not involved in the management of the property. Our Outpatient Medical properties include outpatient medical buildings which are typically leased to multiple tenants and generally require a certain level of property management by us.

We evaluate performance based upon NOI of each segment. We define NOI as total revenues, including tenant reimbursements, less property operating expenses. We believe NOI provides investors relevant and useful information because it measures the operating performance of our properties at the property level on an unleveraged basis. We use NOI to make decisions about resource allocations and to assess the property level performance of our properties.

Non-segment revenue consists mainly of interest income on certain non-real estate investments and other income. Non-segment assets consist of corporate assets including cash, deferred loan expenses and corporate offices and equipment among others. Non-property specific revenues and expenses are not allocated to individual segments in determining NOI.

The accounting policies of the segments are the same as those described in the summary of significant accounting policies (see Note 2). The results of operations for all acquisitions described in Note 3 are included in our consolidated results of operations from the acquisition dates and are components of the appropriate segments.