NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

NOTE 1—DESCRIPTION OF BUSINESS

Ventas, Inc. (together with its subsidiaries, unless otherwise indicated or except where the context otherwise requires, “we,” “us” or “our”), an S&P 500 company, is a real estate investment trust (“REIT”) with a highly diversified portfolio of seniors housing and healthcare properties located throughout the United States, Canada and the United Kingdom. As of September 30, 2017 , we owned more than 1,200 properties (including properties owned through investments in unconsolidated entities and properties classified as held for sale), consisting of seniors housing communities, medical office buildings (“MOBs”), life science and innovation centers, inpatient rehabilitation and long-term acute care facilities, health systems and skilled nursing facilities (“SNFs”), and we had 13 properties under development, including one property that is owned by an unconsolidated real estate entity. Our company was originally founded in 1983 and is headquartered in Chicago, Illinois.

We primarily invest in seniors housing and healthcare properties through acquisitions and lease our properties to unaffiliated tenants or operate them through independent third-party managers. As of September 30, 2017 , we leased a total of 558 properties (excluding MOBs) to various healthcare operating companies under “triple-net” or “absolute-net” leases that obligate the tenants to pay all property-related expenses, including maintenance, utilities, repairs, taxes, insurance and capital expenditures, and we engaged independent operators, such as Atria Senior Living, Inc. (“Atria”) and Sunrise Senior Living, LLC (together with its subsidiaries, “Sunrise”), to manage 296 seniors housing communities for us pursuant to long-term management agreements.

Our three largest tenants, Brookdale Senior Living Inc. (together with its subsidiaries, “Brookdale Senior Living”), Ardent Health Partners, LLC (together with its subsidiaries, “Ardent”) and Kindred Healthcare, Inc. (together with its subsidiaries, “Kindred”) leased from us 136 properties (excluding one property managed by Brookdale Senior Living pursuant to a long-term management agreement), 10 properties and 46 properties (excluding one MOB included within our office operations reportable business segment), respectively, as of September 30, 2017 .

Through our Lillibridge Healthcare Services, Inc. subsidiary and our ownership interest in PMB Real Estate Services LLC, we also provide MOB management, leasing, marketing, facility development and advisory services to highly rated hospitals and health systems throughout the United States. In addition, from time to time, we make secured and non-mortgage loans and other investments relating to seniors housing and healthcare operators or properties.

NOTE 2—ACCOUNTING POLICIES

The accompanying Consolidated Financial Statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information set forth in the Accounting Standards Codification (“ASC”), as published by the Financial Accounting Standards Board (“FASB”), and with the Securities and Exchange Commission (“SEC”) instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair statement of results for the interim period have been included. Operating results for the three and nine months ended September 30, 2017 are not necessarily indicative of the results that may be expected for the year ending December 31, 2017 . The accompanying Consolidated Financial Statements and related notes should be read in conjunction with the audited Consolidated Financial Statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2016 , filed with the SEC on February 14, 2017. Certain prior period amounts have been reclassified to conform to the current period presentation.

Principles of Consolidation

The accompanying Consolidated Financial Statements include our accounts and the accounts of our wholly owned subsidiaries and the joint venture entities over which we exercise control. All intercompany transactions and balances have been eliminated in consolidation, and our net earnings are reduced by the portion of net earnings attributable to noncontrolling interests.

GAAP requires us to identify entities for which control is achieved through means other than voting rights and to determine which business enterprise is the primary beneficiary of variable interest entities (“VIEs”). A VIE is broadly defined as an entity with one or more of the following characteristics: (a) the total equity investment at risk is insufficient to finance the entity’s activities without additional subordinated financial support; (b) as a group, the holders of the equity investment at risk lack (i) the ability to make decisions about the entity’s activities through voting or similar rights, (ii) the obligation to absorb the expected losses of the entity, or (iii) the right to receive the expected residual returns of the entity; and (c) the equity investors have voting rights that are not proportional to their economic interests, and substantially all of the entity’s activities either involve, or are conducted on behalf of, an investor that has disproportionately few voting rights. We consolidate our

investment in a VIE when we determine that we are its primary beneficiary. We may change our original assessment of a VIE upon subsequent events such as the modification of contractual arrangements that affects the characteristics or adequacy of the entity’s equity investments at risk and the disposition of all or a portion of an interest held by the primary beneficiary.

We identify the primary beneficiary of a VIE as the enterprise that has both: (i) the power to direct the activities of the VIE that most significantly impact the entity’s economic performance; and (ii) the obligation to absorb losses or the right to receive benefits of the VIE that could be significant to the entity. We perform this analysis on an ongoing basis.

As it relates to investments in joint ventures, 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 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 (“LP”) interests or there is an increase or decrease in the number of outstanding LP interests. We also apply this guidance to managing member interests in limited liability companies (“LLCs”).

We consolidate several VIEs that share the following common characteristics:

• the VIE is in the legal form of an LP or LLC;

• the VIE was designed to own and manage its underlying real estate investments;

• we are the general partner or managing member of the VIE;

• we own a majority of the voting interests in the VIE;

• a minority of voting interests in the VIE are owned by external third parties, unrelated to us;

• the minority owners do not have substantive kick-out or participating rights in the VIE; and

• we are the primary beneficiary of the VIE.

We have separately identified certain special purpose entities that were established to allow investments in life science projects by tax credit investors (“TCIs”). We have determined that these special purpose entities are VIEs and that we are the primary beneficiary of the VIEs, and therefore we consolidate these special purpose entities. Our primary beneficiary determination is based upon several factors, including but not limited to the rights we have in directing the activities which most significantly impact the VIEs’ economic performance as well as certain guarantees which protect the TCIs from losses should a tax credit recapture event occur.

In general, the assets of consolidated VIEs are available only for the settlement of the obligations of the respective entities. Unless otherwise required by the LP or LLC agreement, any mortgage loans of the consolidated VIEs are non-recourse to us. The table below summarizes the total assets and liabilities of our consolidated VIEs as reported on our Consolidated Balance Sheets.

Investments in Unconsolidated Entities

We report investments in unconsolidated entities over whose operating and financial policies we have the ability to exercise significant influence under the equity method of accounting. Under this method of accounting, our share of the investee’s earnings or losses is included in our Consolidated Statements of Income.

We base the initial carrying value of investments in unconsolidated entities on the fair value of the assets at the time we acquired the joint venture interest. We estimate fair values for our equity method investments based on discounted cash flow models that include all estimated cash inflows and outflows over a specified holding period and, where applicable, any estimated debt premiums or discounts. The capitalization rates, discount rates and credit spreads we use in these models are based upon assumptions that we believe to be within a reasonable range of current market rates for the respective investments.

We generally amortize any difference between our cost basis and the basis reflected at the joint venture level, if any, over the lives of the related assets and liabilities and include that amortization in our share of income or loss from unconsolidated entities. For earnings of equity method investments with pro rata distribution allocations, net income or loss is allocated between the partners in the joint venture based on their respective stated ownership percentages. In other instances, net income or loss is allocated between the partners in the joint venture based on the hypothetical liquidation at book value method (the “HLBV method”). Under the HLBV method, net income or loss is allocated between the partners based on the difference between each partner’s claim on the net assets of the joint venture at the end and beginning of the period, after taking into account contributions and distributions. Each partner’s share of the net assets of the joint venture is calculated as the amount that the partner would receive if the joint venture were to liquidate all of its assets at net book value and distribute the resulting cash to creditors and partners in accordance with their respective priorities. Under the HLBV method, in any given period, we could record more or less income than the joint venture has generated, than actual cash distributions we receive or than the amount we may receive in the event of an actual liquidation.

Redeemable OP Unitholder and Noncontrolling Interests

We own a majority interest in NHP/PMB L.P. (“NHP/PMB”), a limited partnership formed in 2008 to acquire properties from entities affiliated with Pacific Medical Buildings LLC. We consolidate NHP/PMB, as our wholly owned subsidiary is the general partner and the primary beneficiary of this VIE. As of September 30, 2017 , third party investors owned 2.7 million Class A limited partnership units in NHP/PMB (“OP Units”), which represented 27.4% of the total units then outstanding, and we owned 7.2 million Class B limited partnership units in NHP/PMB, representing the remaining 72.6% . At any time following the first anniversary of the date of their issuance, the OP Units may be redeemed at the election of the holder for cash or, at our option, 0.9051 shares of our common stock per OP Unit, subject to further adjustment in certain circumstances. We are party by assumption to a registration rights agreement with the holders of the OP Units that requires us, subject to the terms and conditions and certain exceptions set forth therein, to file and maintain a registration statement relating to the issuance of shares of our common stock upon redemption of OP Units.

Prior to January 2017, we owned a majority interest in Ventas Realty Capital Healthcare Trust Operating Partnership, L.P. (“Ventas Realty OP”) and we consolidated this entity, as our wholly owned subsidiary is the general partner, and was the primary beneficiary of this VIE. In January 2017, third party investors redeemed the remaining 341,776 limited partnership units (“Class C Units”) outstanding for 341,776 shares of Ventas common stock, valued at $20.9 million . After giving effect to such redemptions, Ventas Realty OP is our wholly owned subsidiary.

As redemption rights are outside of our control, the redeemable OP Units and Class C Units (together, the “OP Unitholder Interests”) are classified outside of permanent equity on our Consolidated Balance Sheets. We reflect the redeemable OP Unitholder Interests at the greater of cost or fair value. As of September 30, 2017 and December 31, 2016 , the fair value of the redeemable OP Unitholder Interests was $160.8 million and $177.2 million , respectively. We recognize changes in fair value through capital in excess of par value, net of cash distributions paid and purchases by us of any OP Unitholder Interests. Our diluted earnings per share (“EPS”) includes the effect of any potential shares outstanding from redemption of the OP Unitholder Interests.

Certain noncontrolling interests of other consolidated joint ventures were also classified as redeemable at September 30, 2017 and December 31, 2016 . Accordingly, we record the carrying amount of these noncontrolling interests at the greater of their initial carrying amount (increased or decreased for the noncontrolling interests’ share of net income or loss and distributions) or the redemption value. Our joint venture partners have certain redemption rights with respect to their noncontrolling interests in these joint ventures that are outside of our control, and the redeemable noncontrolling interests are classified outside of permanent equity on our Consolidated Balance Sheets. We recognize changes in the carrying value of redeemable noncontrolling interests through capital in excess of par value. In March 2017, certain joint venture partners redeemed all (or a portion) of their interests for $15.8 million .

Noncontrolling Interests

Excluding the redeemable noncontrolling interests described above, we present the portion of any equity that we do not own in entities that we control (and thus consolidate) as noncontrolling interests and classify those interests as a component of consolidated equity, separate from total Ventas stockholders’ equity, on our Consolidated Balance Sheets. For consolidated joint ventures with pro rata distribution allocations, net income or loss is allocated between the joint venture partners based on their respective stated ownership percentages. In other cases, net income or loss is allocated between the joint venture partners based on the HLBV method. We account for purchases or sales of equity interests that do not result in a change of control as equity transactions, through capital in excess of par value. In addition, we include net income attributable to the noncontrolling interests in net income in our Consolidated Statements of Income.

Accounting for Historic and New Markets Tax Credits

For certain of our life science and innovation centers, we are party to contractual arrangements with TCIs that were established to enable the TCIs to receive benefits of historic tax credits (“HTCs”) and/or new market tax credits (“NMTCs”). As of September 30, 2017 , we owned 11 properties ( three of which were in development) that had syndicated HTCs or NMTCs, or both, to TCIs.

In general, capital contributions are made by TCIs into special purpose entities that invest in entities that own the subject property and generate the tax credits. The TCIs receive substantially all of the tax credits and hold only a noncontrolling interest in the economic risk and benefits of the special purpose entities.

HTCs are delivered to the TCIs upon substantial completion of the project. NMTCs are allowed for up to 39% of a qualified investment and are delivered to the TCIs after the investment has been funded and spent on a qualified business. HTCs are subject to 20% recapture per year beginning one year after the completion of the historic rehabilitation of the subject property. NMTCs are subject to 100% recapture until the end of the seventh year following the qualifying investment. We have provided the TCIs with certain guarantees which protect the TCIs from losses should a tax credit recapture event occur. The contractual arrangements with the TCIs include a put/call provision whereby we may be obligated or entitled to repurchase the ownership interest of the TCIs in the special purpose entities at the end of the tax credit recapture period. We anticipate that either the TCIs will exercise their put rights or we will exercise our call rights prior to the applicable tax credit recapture periods.

The portion of the TCI’s capital contribution that is attributed to the put is recorded at fair value at inception in accounts payable and other liabilities on our Consolidated Balance Sheets, and is accreted to the expected put price as interest expense in our Consolidated Statements of Income over the recapture period. The remaining balance of the TCI’s capital contribution is initially recorded in accounts payable and other liabilities on our Consolidated Balance Sheets and will be relieved upon delivery of the tax credit to the TCI, as a reduction in the carrying value of the subject property, net of allocated expenses. Direct and incremental costs incurred in structuring the transaction are deferred and will be recognized as an increase in the cost basis of the subject property upon the recognition of the related tax credit as discussed above.

Accounting for Real Estate Acquisitions

On January 1, 2017, we adopted Accounting Standards Update (“ASU”) 2017-01, Clarifying the Definition of a Business (“ASU 2017-01”) which narrows the FASB’s definition of a business and provides a framework that gives entities a basis for making reasonable judgments about whether a transaction involves an asset or a business. ASU 2017-01 states that when substantially all of the fair value of the gross assets acquired is concentrated in a single identifiable asset or group of similar identifiable assets, the acquired asset is not a business. If this initial test is not met, an acquired asset cannot be considered a business unless it includes an input and a substantive process that together significantly contribute to the ability to create output. The primary differences between business combinations and asset acquisitions include recognition of goodwill at the acquisition date and expense recognition for transaction costs as incurred. We are applying ASU 2017-01 prospectively for acquisitions after January 1, 2017.

Regardless of whether an acquisition is considered a business combination or an asset acquisition, we record the cost of the businesses or assets acquired as tangible and intangible assets and liabilities based upon their estimated fair values as of the acquisition date. Intangibles primarily include the value of in-place leases and acquired lease contracts.

We estimate the fair value of buildings acquired on an as-if-vacant basis or replacement cost basis and depreciate the building value over the estimated remaining life of the building, generally not to exceed 35  years. We determine the fair value of other fixed assets, such as site improvements and furniture, fixtures and equipment, based upon the replacement cost and depreciate such value over the assets’ estimated remaining useful lives as determined at the applicable acquisition date. We determine the value of land either by considering the sales prices of similar properties in recent transactions or based on internal analyses of recently acquired and existing comparable properties within our portfolio. We generally determine the value of construction in progress based upon the replacement cost. However, for certain acquired properties that are part of a ground-up development, we determine fair value by using the same valuation approach as for all other properties and deducting the estimated cost to complete the development. During the remaining construction period, we capitalize project costs until the development has reached substantial completion. Construction in progress, including capitalized interest, is not depreciated until the development has reached substantial completion.

The fair value of acquired lease-related intangibles, if any, reflects: (i) the estimated value of any above and/or below market leases, determined by discounting the difference between the estimated market rent and in-place lease rent; and (ii) the estimated value of in-place leases related to the cost to obtain tenants, including leasing commissions, and an estimated value of

the absorption period to reflect the value of the rent and recovery costs foregone during a reasonable lease-up period as if the acquired space was vacant. We amortize any acquired lease-related intangibles to revenue or amortization expense over the remaining life of the associated lease plus any assumed bargain renewal periods. If a lease is terminated prior to its stated expiration or not renewed upon expiration, we recognize all unamortized amounts of lease-related intangibles associated with that lease in operations at that time.

We estimate the fair value of purchase option intangible assets and liabilities, if any, by discounting the difference between the applicable property’s acquisition date fair value and an estimate of its future option price. We do not amortize the resulting intangible asset or liability over the term of the lease, but rather adjust the recognized value of the asset or liability upon sale.

We estimate the fair value of tenant or other customer relationships acquired, if any, by considering the nature and extent of existing relationships with the tenant or customer, growth prospects for developing new business with the tenant or customer, the tenant’s credit quality, expectations of lease renewals with the tenant, and the potential for significant, additional future leasing arrangements with the tenant, and we amortize that value over the expected life of the associated arrangements or leases, including the remaining terms of the related leases and any expected renewal periods. We estimate the fair value of trade names and trademarks using a royalty rate methodology and amortize that value over the estimated useful life of the trade name or trademark.

In connection with an acquisition, we may assume rights and obligations under certain lease agreements pursuant to which we become the lessee of a given property. We generally assume the lease classification previously determined by the prior lessee absent a modification in the assumed lease agreement. We assess assumed operating leases, including ground leases, to determine whether the lease terms are favorable or unfavorable to us given current market conditions on the acquisition date. To the extent the lease terms are favorable or unfavorable to us relative to market conditions on the acquisition date, we recognize an intangible asset or liability at fair value and amortize that asset or liability to interest or rental expense in our Consolidated Statements of Income over the applicable lease term. We include all lease-related intangible assets and liabilities within acquired lease intangibles and accounts payable and other liabilities, respectively, on our Consolidated Balance Sheets.

We determine the fair value of loans receivable acquired by discounting the estimated future cash flows using current interest rates at which similar loans with the same terms and length to maturity would be made to borrowers with similar credit ratings. We do not establish a valuation allowance at the acquisition date because the estimated future cash flows already reflect our judgment regarding their uncertainty. We recognize the difference between the acquisition date fair value and the total expected cash flows as interest income using an effective interest method over the life of the applicable loan. Subsequent to the acquisition date, we evaluate changes regarding the uncertainty of future cash flows and the need for a valuation allowance, as appropriate.

We estimate the fair value of noncontrolling interests assumed consistent with the manner in which we value all of the underlying assets and liabilities.

We calculate the fair value of long-term assumed debt by discounting the remaining contractual cash flows on each instrument at the current market rate for those borrowings, which we approximate based on the rate at which we would expect to incur a replacement instrument on the date of acquisition, and recognize any fair value adjustments related to long-term debt as effective yield adjustments over the remaining term of the instrument.

Impairment of Long-Lived and Intangible Assets

We periodically evaluate our long-lived assets, primarily consisting of investments in real estate, for impairment indicators. If indicators of impairment are present, we evaluate the carrying value of the related real estate investments in relation to the future undiscounted cash flows of the underlying operations. In performing this evaluation, we consider market conditions and our current intentions with respect to holding or disposing of the asset. We adjust the net book value of leased properties and other long-lived assets to fair value if the sum of the expected future undiscounted cash flows, including sales proceeds, is less than book value. We recognize an impairment loss at the time we make any such determination.

If impairment indicators arise with respect to intangible assets with finite useful lives, then we evaluate impairment by comparing the carrying amount of the asset to the estimated future undiscounted net cash flows expected to be generated by the asset. If estimated future undiscounted net cash flows are less than the carrying amount of the asset, then we estimate the fair value of the asset and compare the estimated fair value to the intangible asset’s carrying value. We recognize any shortfall from carrying value as an impairment loss in the current period.

We evaluate our investments in unconsolidated entities for impairment at least annually, and whenever events or changes in circumstances indicate that the carrying value of our investment may exceed its fair value. If we determine that a decline in the fair value of our investment in an unconsolidated entity is other-than-temporary, and if such reduced fair value is below the carrying value, we record an impairment.

We test goodwill for impairment at least annually, and more frequently if indicators arise. We first assess qualitative factors, such as current macroeconomic conditions, state of the equity and capital markets and our overall financial and operating performance, to determine the likelihood that the fair value of a reporting unit is less than its carrying amount. If we determine it is more likely than not that the fair value of a reporting unit is less than its carrying amount, we proceed with a two-step approach to evaluating impairment. First, we estimate the fair value of the reporting unit and compare it to the reporting unit’s carrying value. If the carrying value exceeds fair value, we proceed with the second step, which requires us to assign the fair value of the reporting unit to all of the assets and liabilities of the reporting unit as if it had been acquired in a business combination at the date of the impairment test. The excess fair value of the reporting unit over the amounts assigned to the assets and liabilities is the implied value of goodwill and is used to determine the amount of impairment. We recognize an impairment loss to the extent the carrying value of goodwill exceeds the implied value in the current period.

Estimates of fair value used in our evaluation of goodwill (if necessary based on our qualitative assessment), investments in real estate, investments in unconsolidated entities and intangible assets are based upon discounted future cash flow projections or other acceptable valuation techniques that are based, in turn, upon all available evidence including level three inputs, such as revenue and expense growth rates, estimates of future cash flows, capitalization rates, discount rates, general economic conditions and trends, or other available market data. Our ability to accurately predict future operating results and cash flows and to estimate and determine fair values impacts the timing and recognition of impairments. While we believe our assumptions are reasonable, changes in these assumptions may have a material impact on our financial results.

Assets Held for Sale and Discontinued Operations

We sell properties from time to time for various reasons, including favorable market conditions or the exercise of purchase options by tenants. We classify certain long-lived assets as held for sale once the criteria, as defined by GAAP, has been met. Long-lived assets to be disposed of are reported at the lower of their carrying amount or fair value minus cost to sell and are no longer depreciated. We report discontinued operations when the following criteria are met: (1) a component of an entity or group of components has been disposed of or classified as held for sale and represents a strategic shift that has or will have a major effect on an entity’s operations and financial results; or (2) an acquired business is classified as held for sale on the acquisition date. The results of operations for assets meeting the definition of discontinued operations are reflected in our Consolidated Statements of Income as discontinued operations for all periods presented. We allocate estimated interest expense to discontinued operations based on property values and our weighted average interest rate or the property’s actual mortgage interest.

Fair Values of Financial Instruments

Fair value is a market-based measurement, not an entity-specific measurement, and we determine fair value based on the assumptions that we expect market participants would use in pricing the asset or liability. As a basis for considering market participant assumptions in fair value measurements, GAAP establishes a fair value hierarchy that distinguishes between market participant assumptions based on market data obtained from sources independent of the reporting entity (observable inputs that are classified within levels one and two of the hierarchy) and the reporting entity’s own assumptions about market participant assumptions (unobservable inputs classified within level three of the hierarchy).

Level one inputs utilize unadjusted quoted prices for identical assets or liabilities in active markets that we have the ability to access. Level two inputs are inputs other than quoted prices included in level one that are directly or indirectly observable for the asset or liability. Level two inputs may include quoted prices for similar assets and liabilities in active markets and other inputs for the asset or liability that are observable at commonly quoted intervals, such as interest rates, foreign exchange rates and yield curves. Level three inputs are unobservable inputs for the asset or liability, which typically are based on our own assumptions, because there is little, if any, related market activity. If the determination of the fair value measurement is based on inputs from different levels of the hierarchy, the level within which the entire fair value measurement falls is the lowest level input that is significant to the fair value measurement in its entirety. If the volume and level of market activity for an asset or liability has decreased significantly relative to the normal market activity for such asset or liability (or similar assets or liabilities), then transactions or quoted prices may not accurately reflect fair value. In addition, if there is evidence that a transaction for an asset or liability is not orderly, little, if any, weight is placed on that transaction price as an indicator of fair value. Our assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability.

We use the following methods and assumptions in estimating the fair value of our financial instruments.

Revenue Recognition

Triple-Net Leased Properties and Office Operations

Certain of our triple-net leases and most of our MOB and life science and innovation center (collectively, “office operations”) leases provide for periodic and determinable increases in base rent. We recognize base rental revenues under these leases on a straight-line basis over the applicable lease term when collectibility is reasonably assured. Recognizing rental income on a straight-line basis generally results in recognized revenues during the first half of a lease term exceeding the cash amounts contractually due from our tenants, creating a straight-line rent receivable that is included in other assets on our Consolidated Balance Sheets. At September 30, 2017 and December 31, 2016 , this cumulative excess totaled $262.0 million (net of allowances of $115.4 million ) and $244.6 million (net of allowances of $109.8 million ), respectively (excluding properties classified as held for sale).

Certain of our leases provide for periodic increases in base rent only if certain revenue parameters or other substantive contingencies are met. We recognize the increased rental revenue under these leases as the related parameters or contingencies are met, rather than on a straight-line basis over the applicable lease term.

Senior Living Operations

We recognize resident fees and services, other than move-in fees, monthly as services are provided. We recognize move-in fees on a straight-line basis over the average resident stay. Our lease agreements with residents generally have terms of 12 to 18 months and are cancelable by the resident upon 30  days’ notice.

Other

We recognize interest income from loans and investments, including discounts and premiums, using the effective interest method when collectibility is reasonably assured. We apply the effective interest method on a loan-by-loan basis and

recognize discounts and premiums as yield adjustments over the related loan term. We recognize interest income on an impaired loan to the extent our estimate of the fair value of the collateral is sufficient to support the balance of the loan, other receivables and all related accrued interest. When the balance of the loan, other receivables and all related accrued interest is equal to or less than our estimate of the fair value of the collateral, we recognize interest income on a cash basis. We provide a reserve against an impaired loan to the extent our total investment in the loan exceeds our estimate of the fair value of the loan collateral.

We recognize income from rent, lease termination fees, development services, management advisory services and all other income when all of the following criteria are met in accordance with SEC Staff Accounting Bulletin 104: (i) the applicable agreement has been fully executed and delivered; (ii) services have been rendered; (iii) the amount is fixed or determinable; and (iv) collectibility is reasonably assured.

Allowances

We assess the collectibility of our rent receivables, including straight-line rent receivables. We base our assessment of the collectibility of rent receivables (other than straight-line rent receivables) on several factors, including, among other things, payment history, the financial strength of the tenant and any guarantors, the value of the underlying collateral, if any, and current economic conditions. If our evaluation of these factors indicates it is probable that we will be unable to recover the full value of the receivable, we provide a reserve against the portion of the receivable that we estimate may not be recovered. We base our assessment of the collectibility of straight-line rent receivables on several factors, including, among other things, the financial strength of the tenant and any guarantors, the historical operations and operating trends of the property, the historical payment pattern of the tenant and the type of property. If our evaluation of these factors indicates it is probable that we will be unable to receive the rent payments due in the future, we provide a reserve against the recognized straight-line rent receivable asset for the portion, up to its full value, that we estimate may not be recovered. If we change our assumptions or estimates regarding the collectibility of future rent payments required by a lease, we may adjust our reserve to increase or reduce the rental revenue recognized in the period we make such change in our assumptions or estimates.

Recently Issued or Adopted Accounting Standards

On January 1, 2017, we adopted ASU 2016-09, Compensation - Stock Compensation (“ASU 2016-09”) which simplifies several aspects of the accounting for employee share-based payment transactions, including the accounting for forfeitures and statutory tax withholding requirements, as well as classification in the statement of cash flows. Adoption of ASU 2016-09 did not have a significant impact on our Consolidated Financial Statements.

In 2014, the FASB issued ASU 2014-09, Revenue From Contracts With Customers (“ASU 2014-09”, as codified in “ASC 606”), which outlines a comprehensive model for entities to use in accounting for revenue arising from contracts with customers. ASC 606 states that “an entity recognizes revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services.” While ASC 606 specifically references contracts with customers, it may also apply to certain other transactions such as the sale of real estate. ASC 606 is effective for us beginning January 1, 2018 and we plan to adopt ASC 606 using the modified retrospective method.

We have evaluated all of our revenue streams to identify any differences in the timing, measurement or presentation of revenue recognition. Based on a review of our various revenue streams, we believe the following items in our Consolidated Statements of Income are subject to ASC 606: office building and other services revenue, certain elements of our resident fees and services, common area maintenance in our office operations and gains on the sale of real estate. Our office building and other services revenues are primarily generated by management contracts where we provide management, leasing, marketing, facility development and advisory services. Resident fees and services include revenues generated through certain point-of-sale transactions provided to residents of our seniors housing communities that are ancillary to the residents’ contractual rights to occupy living and common-area space at the communities. While these revenue streams are subject to the application of ASC 606, we believe that the pattern and timing of recognition of income will be consistent with the current accounting model. We will not apply the principles of ASC 606 to our common area maintenance revenues and certain resident fees and services until January 1, 2019, when we adopt ASU 2016-02, Leases (“ASU 2016-02”).

As it relates to gains on sale of real estate, we expect to recognize any gains when we transfer control of a property and will no longer apply existing sales criteria in ASC 360, Property, Plant, and Equipment. We are evaluating the impact of ASC 606 to $31.2 million of deferred gains relating to sales of real estate assets in 2015. Other than the potential cumulative effect adjustment relating to such deferred gains, we do not expect the adoption of ASC 606 to have a significant impact on our Consolidated Financial Statements. Our remaining implementation items include calculating the cumulative effect adjustment, if any, to be recorded upon adoption of ASC 606, drafting revised disclosures in accordance with the new standard and implementing changes to internal control policies and procedures, if any.

In February 2016, the FASB issued ASU 2016-02, which introduces a lessee model that brings most leases on the balance sheet and, among other changes, eliminates the requirement in current GAAP for an entity to use bright-line tests in determining lease classification. ASU 2016-02 is not effective for us until January 1, 2019, with early adoption permitted. We are continuing to evaluate this guidance and the impact to us, as both lessor and lessee, on our Consolidated Financial Statements.

In 2016, the FASB issued ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments (“ASU 2016-15”), which provides clarification regarding how certain cash receipts and cash payments are presented and classified in the statement of cash flows and ASU 2016-18, Restricted Cash (“ASU 2016-18”), which requires an entity to show the changes in total cash, cash equivalents, restricted cash and restricted cash equivalents in the statement of cash flows. ASU 2016-15 and ASU 2016-18 are effective for us beginning January 1, 2018 and will be applied by us using a retrospective transition method. Adoption of these standards is not expected to have a significant impact on our Consolidated Financial Statements.

In 2016, the FASB issued ASU 2016-16, Intra-Entity Transfers of Assets Other Than Inventory (“ASU 2016-16”), which requires a company to recognize the tax consequences of an intra-entity transfer of an asset, other than inventory, when the transfer occurs. ASU 2016-16 is effective for us beginning January 1, 2018 and will be applied by us using a modified retrospective method. Adoption of this standard is not expected to have a significant impact on our Consolidated Financial Statements.

NOTE 3—CONCENTRATION OF CREDIT RISK

As of September 30, 2017 , Atria, Sunrise, Brookdale Senior Living, Ardent and Kindred managed or operated approximately 22.1% , 10.9% , 7.6% , 4.9% and 1.1% , respectively, of our real estate investments based on gross book value (excluding properties classified as held for sale and properties owned through investments in unconsolidated entities as of September 30, 2017 ). Because Atria and Sunrise manage our properties in exchange for the receipt of a management fee from us, we are not directly exposed to the credit risk of our managers in the same manner or to the same extent as our triple-net lease tenants.