Summary of Significant Accounting Policies (Policies)	3 Months Ended
Mar. 31, 2021
Accounting Policies [Abstract]
Unaudited Interim Condensed Consolidated Financial Statements	Unaudited Interim Condensed Consolidated Financial Statements: The accompanying unaudited interim condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the U.S. for interim financial information, including rules and regulations of the Securities and Exchange Commission (“SEC”). Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles (“GAAP”) for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair statement have been included. Operating results for the three months ended March 31, 2021, are not necessarily indicative of the results that may be expected for the year ending December 31, 2021. The condensed consolidated balance sheet at December 31, 2020 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the U.S. for complete financial statements. The preparation of our condensed consolidated financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. We believe the estimates and assumptions underlying our condensed consolidated financial statements are reasonable and supportable based on the information available as of March 31, 2021 (particularly as it relates to our assessments of the recoverability of our real estate and the adequacy of our credit loss reserves on loans and financing receivables). Although COVID-19 vaccines continue to roll out worldwide and hospitals around the world have generally returned to their normal operations, the ultimate impact to our tenants’ results of operations and liquidity and their ability to pay our rent and interest due to the impact of COVID-19 cannot be predicted with 100% confidence. This makes any estimates and assumptions as of March 31, 2021 inherently less certain than they would be absent the potential impact of COVID-19. Actual results may ultimately differ from our estimates. For information about significant accounting policies, refer to the consolidated financial statements and footnotes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2020. There have been no material changes to these significant accounting policies other than the following:
Recent Accounting Developments	Recent Accounting Developments Reference Rate Reform In March 2020, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2020-04, “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting” (“ASU 2020-04”) to simplify the accounting for contract modifications made to replace LIBOR or other reference rates that are expected to be discontinued because of reference rate reform. The guidance provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criterion are met. The optional expedients and exceptions can be applied to contract modifications made until December 31, 2022. On January 7, 2021, the FASB issued ASU No. 2021-01, “Reference Rate Reform (Topic 848)” (“ASU 2021-01”), which clarifies that certain optional expedients and exceptions in Topic 848 for contract modifications and hedge accounting apply to derivatives that are affected by the transition. We have evaluated our contracts that are referenced to LIBOR or other reference rates expected to be discontinued. We expect our British pound sterling term loan and corresponding interest rate swap to be modified with a replacement reference rate during 2021, and we expect to account for such modifications using the expedients and exceptions provided for in ASU 2020-04 and ASU 2021-01. We are continuing to evaluate the need to modify our U.S. dollar LIBOR contracts, such as our unsecured credit facility, as the requirement to replace the U.S. dollar LIBOR has been extended to June 30, 2023. Moreover, we do not expect any impact to our Australian dollar term loan and corresponding interest rate swap, as these contracts are not referenced to rates that are expected to be discontinued.
Reclassifications	Reclassifications Certain amounts in the consolidated financial statements for prior periods have been reclassified to conform to the current period presentation.
Variable Interest Entities	Variable Interest Entities At March 31, 2021, we had loans and/or equity investments in certain variable interest entities approximating $350 million, which represents our maximum exposure to loss as a result of our involvement in such entities. We have determined that we were not the primary beneficiary of any variable interest entity in which we hold a variable interest because we do not control the activities (such as the day-to-day operations) that most significantly impact the economic performance of these entities.

Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2021

Unaudited Interim Condensed Consolidated Financial Statements

Unaudited Interim Condensed Consolidated Financial Statements: The accompanying unaudited interim condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the U.S. for interim financial information, including rules and regulations of the Securities and Exchange Commission (“SEC”). Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles (“GAAP”) for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair statement have been included. Operating results for the three months ended March 31, 2021, are not necessarily indicative of the results that may be expected for the year ending December 31, 2021. The condensed consolidated balance sheet at December 31, 2020 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the U.S. for complete financial statements.

The preparation of our condensed consolidated financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. We believe the estimates and assumptions underlying our condensed consolidated financial statements are reasonable and supportable based on the information available as of March 31, 2021 (particularly as it relates to our assessments of the recoverability of our real estate and the adequacy of our credit loss reserves on loans and financing receivables). Although COVID-19 vaccines continue to roll out worldwide and hospitals around the world have generally returned to their normal operations, the ultimate impact to our tenants’ results of operations and liquidity and their ability to pay our rent and interest due to the impact of COVID-19 cannot be predicted with 100% confidence. This makes any estimates and assumptions as of March 31, 2021 inherently less certain than they would be absent the potential impact of COVID-19. Actual results may ultimately differ from our estimates.

For information about significant accounting policies, refer to the consolidated financial statements and footnotes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2020. There have been no material changes to these significant accounting policies other than the following:

Recent Accounting Developments

Reference Rate Reform

In March 2020, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2020-04, “Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting” (“ASU 2020-04”) to simplify the accounting for contract modifications made to replace LIBOR or other reference rates that are expected to be discontinued because of reference rate reform. The guidance provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criterion are met. The optional expedients and exceptions can be applied to contract modifications made until December 31, 2022. On January 7, 2021, the FASB issued ASU No. 2021-01, “Reference Rate Reform (Topic 848)” (“ASU 2021-01”), which clarifies that certain optional expedients and exceptions in Topic 848 for contract modifications and hedge accounting apply to derivatives that are affected by the transition. We have evaluated our contracts that are referenced to LIBOR or other reference rates expected to be discontinued. We expect our British pound sterling term loan and corresponding interest rate swap to be modified with a replacement reference rate during 2021, and we expect to account for such modifications using the expedients and exceptions provided for in ASU 2020-04 and ASU 2021-01. We are continuing to evaluate the need to modify our U.S. dollar LIBOR contracts, such as our unsecured credit facility, as the requirement to replace the U.S. dollar LIBOR has been extended to June 30, 2023. Moreover, we do not expect any impact to our Australian dollar term loan and corresponding interest rate swap, as these contracts are not referenced to rates that are expected to be discontinued.

Reclassifications

Certain amounts in the consolidated financial statements for prior periods have been reclassified to conform to the current period presentation.

Variable Interest Entities

At March 31, 2021, we had loans and/or equity investments in certain variable interest entities approximating $350 million, which represents our maximum exposure to loss as a result of our involvement in such entities. We have determined that we were not the primary beneficiary of any variable interest entity in which we hold a variable interest because we do not control the activities (such as the day-to-day operations) that most significantly impact the economic performance of these entities.