Accounting Policies and Related Matters (Policies)	12 Months Ended
Dec. 31, 2012
Accounting Policies and Related Matters (Policies) [Abstract]
Principles of Consolidation	Principles of Consolidation The consolidated financial statements include the accounts of our wholly-owned subsidiaries and joint venture entities that we control, through voting rights or other means. All material intercompany transactions and balances have been eliminated in consolidation. At inception of joint venture 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 on a continuous basis. 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 joint ventures, we evaluate the type of rights held by the limited partner(s), which may preclude consolidation in circumstances in which the sole general partner would otherwise consolidate the limited partnership. The assessment of limited partners’ rights and their impact on the presumption of control over a limited partnership by the sole general partner should be made when an investor becomes the sole general partner and should be reassessed if (i) there is a change to the terms or in the exercisability of the rights of the limited partners, (ii) the sole general partner increases or decreases its ownership in the limited partnership, or (iii) 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.
Use of Estimates	Use of Estimates The preparation of the 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 financial statements and accompanying notes. Actual results could differ from those estimates.
Revenue Recognition	Revenue Recognition Revenue is recorded in accordance with U.S. GAAP, which requires that revenue be recognized after four basic criteria are met. These four criteria include persuasive evidence of an arrangement, the rendering of service, fixed and determinable income and reasonably assured collectability. Interest income on loans is recognized as earned based upon the principal amount outstanding subject to an evaluation of collectability risk. Substantially all of our operating leases contain escalating rent structures. 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 medical office building 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. We recognize resident fees and services, other than move-in fees, monthly as services are provided. Lease agreements with residents generally have a term of one year and are cancelable by the resident with 30 days’ notice.
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 and amounts held in escrow relating to acquisitions we are entitled to receive over a period of time as outlined in the escrow agreement.
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. 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 less than majority owned entities where our interests represent a general partnership interest but substantive participating or kick-out rights have been granted to the limited partners, or where our interests do not represent the general partnership interest and we do not control the major operating and financial policies of the entity, are reported under the equity method of accounting. Under the equity method of accounting, our share of the investee’s earnings or losses is included in our consolidated results of operations. 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. The initial carrying value of investments in unconsolidated entities is based on the amount paid to purchase the entity interest or the estimated fair value of the assets prior to the sale of interests in the entity. Other equity investments include an investment in available-for-sale securities. These equity investments represented a minimal ownership interest in these companies. 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.
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. In accordance with ASC 810, the redeemable noncontrolling interests were classified outside of permanent equity, as a mezzanine item, in the balance sheet.
Real Property Owned	Real Property Owned Real property developed by us is recorded at cost, including the capitalization of construction period interest. Expenditures for repairs and maintenance are expensed as incurred. Property acquisitions are accounted for as business combinations where we measure the assets acquired, liabilities (including assumed debt and contingencies) and any noncontrolling interests at their fair values on the acquisition date. The cost of real property acquired, which represents substantially all of the purchase price, is allocated to net tangible and identifiable intangible assets based on their respective fair values. 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. Tangible assets primarily consist of land, buildings and improvements, including those related to capital leases. 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 statement of cash flows. The remaining purchase price is allocated among identifiable intangible assets primarily consisting of the above or below market component of in-place leases and the value associated with the presence of in-place tenants or residents. 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. 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 will be amortized over the assumed re-leasing period. 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 asset over the remaining depreciation period indicate that the asset 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.
Capitalization of Construction Period Interest	Capitalization of Construction Period Interest We capitalize interest costs associated with funds used for the construction of properties owned directly by us. The amount capitalized is based upon the balance outstanding during the construction period using the rate of interest which approximates our cost of financing. We capitalize interest costs related to construction of real property owned by us. Our interest expense reflected in the consolidated statements of comprehensive income has been reduced by the amounts capitalized.
Gain on Sale of Assets	Gain on Sale of Assets We recognize sales of assets only upon the closing of the transaction with the purchaser. Payments received from purchasers prior to closing are recorded as deposits and classified as other assets on our consolidated balance sheets. Gains on assets sold are recognized using the full accrual method upon closing when (i) the collectability of the sales price is reasonably assured, (ii) we are not obligated to perform significant activities after the sale to earn the profit, (iii) we have received adequate initial investment from the purchaser and (iv) other profit recognition criteria have been satisfied. Gains may be deferred in whole or in part until the sales satisfy the requirements of gain recognition on sales of real estate.
Real Estate Loans Receivable	Real Estate Loans Receivable Real estate loans receivable consist of mortgage loans and other real estate loans. Interest income on loans is recognized as earned based upon the principal amount outstanding subject to an evaluation of collectability risks. The loans 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 guaranties and/or personal guaranties.
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 full accrual status. While a loan is on non-accrual status, any cash receipts are applied against the outstanding principal balance.
Goodwill	Goodwill We account for goodwill in accordance with U.S. GAAP. 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 11 for additional information.
Federal Income Tax	Federal Income Tax We have elected to be treated as a REIT under the applicable provisions of the Internal Revenue Code of 1986, as amended (the “Code”), commencing with our first taxable year, and made no provision for federal income tax purposes prior to our acquisition of our “taxable REIT subsidiaries.” 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 taxable REIT subsidiaries 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 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 18 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. We record transaction gains and losses in our consolidated statements of comprehensive income.
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.
New Accounting Standards	New Accounting Standards In May 2011, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2011-04, “Fair Value Measurements (Topic 820): Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRS” (“ASU 2011-04”), which requires incremental fair value disclosures in the notes to the financial statements. We have adopted ASU 2011-04 effective January 1, 2012. The adoption of this guidance did not have a material impact on our consolidated financial position or results of operations. In June 2011, the FASB issued ASU No. 2011-05, “Presentation of Comprehensive Income” (“ASU 2011-05”), which requires entities to present net income and other comprehensive income in either a single continuous statement or in two separate, but consecutive, statements of net income and other comprehensive income. We have adopted ASU 2011-05 effective January 1, 2012 and presented total comprehensive income on the consolidated statements of comprehensive income. Further disclosures including reconciliation from net income to total comprehensive income will be required on an annual basis. The provisions of ASU No. 2011-12, “Deferral of the Effective Date for Amendments to the Presentation of Reclassifications of Items Out of Accumulated Other Comprehensive Income in ASU 2011-05” delayed the requirement to present certain reclassifications on the face of the financial statements.
Reclassifications	Reclassifications Certain amounts in prior years have been reclassified to conform to current year presentation.

Accounting Policies and Related Matters (Policies)

12 Months Ended

Dec. 31, 2012

Accounting Policies and Related Matters (Policies) [Abstract]

The consolidated financial statements include the accounts of our wholly-owned subsidiaries and joint venture entities that we control, through voting rights or other means. All material intercompany transactions and balances have been eliminated in consolidation.

At inception of joint venture 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 on a continuous basis. 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 joint ventures, we evaluate the type of rights held by the limited partner(s), which may preclude consolidation in circumstances in which the sole general partner would otherwise consolidate the limited partnership. The assessment of limited partners’ rights and their impact on the presumption of control over a limited partnership by the sole general partner should be made when an investor becomes the sole general partner and should be reassessed if (i) there is a change to the terms or in the exercisability of the rights of the limited partners, (ii) the sole general partner increases or decreases its ownership in the limited partnership, or (iii) 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.

Use of Estimates

The preparation of the 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 financial statements and accompanying notes. Actual results could differ from those estimates.

Revenue Recognition

Revenue is recorded in accordance with U.S. GAAP, which requires that revenue be recognized after four basic criteria are met. These four criteria include persuasive evidence of an arrangement, the rendering of service, fixed and determinable income and reasonably assured collectability. Interest income on loans is recognized as earned based upon the principal amount outstanding subject to an evaluation of collectability risk. Substantially all of our operating leases contain escalating rent structures. 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 medical office building 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. We recognize resident fees and services, other than move-in fees, monthly as services are provided. Lease agreements with residents generally have a term of one year and are cancelable by the resident with 30 days’ notice.

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 and amounts held in escrow relating to acquisitions we are entitled to receive over a period of time as outlined in the escrow agreement.

Deferred Loan Expenses

Deferred loan expenses are costs incurred by us in connection with the issuance, assumption and amendments of debt arrangements. 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 less than majority owned entities where our interests represent a general partnership interest but substantive participating or kick-out rights have been granted to the limited partners, or where our interests do not represent the general partnership interest and we do not control the major operating and financial policies of the entity, are reported under the equity method of accounting. Under the equity method of accounting, our share of the investee’s earnings or losses is included in our consolidated results of operations. 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. The initial carrying value of investments in unconsolidated entities is based on the amount paid to purchase the entity interest or the estimated fair value of the assets prior to the sale of interests in the entity. Other equity investments include an investment in available-for-sale securities. These equity investments represented a minimal ownership interest in these companies. 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.

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. In accordance with ASC 810, the redeemable noncontrolling interests were classified outside of permanent equity, as a mezzanine item, in the balance sheet.

Real Property Owned

Real property developed by us is recorded at cost, including the capitalization of construction period interest. Expenditures for repairs and maintenance are expensed as incurred. Property acquisitions are accounted for as business combinations where we measure the assets acquired, liabilities (including assumed debt and contingencies) and any noncontrolling interests at their fair values on the acquisition date. The cost of real property acquired, which represents substantially all of the purchase price, is allocated to net tangible and identifiable intangible assets based on their respective fair values. 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. Tangible assets primarily consist of land, buildings and improvements, including those related to capital leases. 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 statement of cash flows.

The remaining purchase price is allocated among identifiable intangible assets primarily consisting of the above or below market component of in-place leases and the value associated with the presence of in-place tenants or residents. 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.

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 will be amortized over the assumed re-leasing period.

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 asset over the remaining depreciation period indicate that the asset 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.

Capitalization of Construction Period Interest

We capitalize interest costs associated with funds used for the construction of properties owned directly by us. The amount capitalized is based upon the balance outstanding during the construction period using the rate of interest which approximates our cost of financing. We capitalize interest costs related to construction of real property owned by us. Our interest expense reflected in the consolidated statements of comprehensive income has been reduced by the amounts capitalized.

Gain on Sale of Assets

We recognize sales of assets only upon the closing of the transaction with the purchaser. Payments received from purchasers prior to closing are recorded as deposits and classified as other assets on our consolidated balance sheets. Gains on assets sold are recognized using the full accrual method upon closing when (i) the collectability of the sales price is reasonably assured, (ii) we are not obligated to perform significant activities after the sale to earn the profit, (iii) we have received adequate initial investment from the purchaser and (iv) other profit recognition criteria have been satisfied. Gains may be deferred in whole or in part until the sales satisfy the requirements of gain recognition on sales of real estate.

Real Estate Loans Receivable

Real estate loans receivable consist of mortgage loans and other real estate loans. Interest income on loans is recognized as earned based upon the principal amount outstanding subject to an evaluation of collectability risks. The loans 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 guaranties and/or personal guaranties.

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 full accrual status. While a loan is on non-accrual status, any cash receipts are applied against the outstanding principal balance.

Goodwill

We account for goodwill in accordance with U.S. GAAP. 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 11 for additional information.

Federal Income Tax

We have elected to be treated as a REIT under the applicable provisions of the Internal Revenue Code of 1986, as amended (the “Code”), commencing with our first taxable year, and made no provision for federal income tax purposes prior to our acquisition of our “taxable REIT subsidiaries.” 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 taxable REIT subsidiaries 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 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 18 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. We record transaction gains and losses in our consolidated statements of comprehensive income.

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.

New Accounting Standards

In May 2011, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2011-04, “Fair Value Measurements (Topic 820): Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRS” (“ASU 2011-04”), which requires incremental fair value disclosures in the notes to the financial statements. We have adopted ASU 2011-04 effective January 1, 2012. The adoption of this guidance did not have a material impact on our consolidated financial position or results of operations.

In June 2011, the FASB issued ASU No. 2011-05, “Presentation of Comprehensive Income” (“ASU 2011-05”), which requires entities to present net income and other comprehensive income in either a single continuous statement or in two separate, but consecutive, statements of net income and other comprehensive income. We have adopted ASU 2011-05 effective January 1, 2012 and presented total comprehensive income on the consolidated statements of comprehensive income. Further disclosures including reconciliation from net income to total comprehensive income will be required on an annual basis. The provisions of ASU No. 2011-12, “Deferral of the Effective Date for Amendments to the Presentation of Reclassifications of Items Out of Accumulated Other Comprehensive Income in ASU 2011-05” delayed the requirement to present certain reclassifications on the face of the financial statements.

Reclassifications

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