Summary of Significant Accounting Policies	3 Months Ended
Mar. 31, 2020
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2.Summary of Significant Accounting Policies Significant Accounting Policies There were no material changes to our significant accounting policies disclosed in our Annual Report on Form 10-K for the year ended December 31, 2019. Use of Estimates The preparation of the 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 financial statements and the reported amounts of revenue and expenses during the reporting period. The most significant of these estimates include: (i) the underlying cash flows and holding periods used in assessing impairment; (ii) the determination of useful lives for tangible and intangible assets; and (iii) the assessment of the collectability of receivables, including deferred rent receivables. Due to the current pandemic of the novel coronavirus, or COVID-19, commencing in March 2020, authorities in jurisdictions where our properties are located issued stay-at-home orders and restrictions on travel and the types of businesses permitted to continue operations. The extent to which the COVID-19 pandemic impacts us and our tenants will depend on future developments, which are highly uncertain and cannot be predicted. The extent and duration of the stay-at-home orders and other effects of COVID-19 on us and our tenants will effect estimates used in the preparation of the underlying cash flows used in assessing our long-lived assets for impairment and the assessment of the collectability of receivables from tenants, including deferred rent receivables. We have made, what we believe to be, appropriate accounting estimates based on the facts and circumstances available as of the reporting date. To the extent these estimates differ from actual results, our consolidated financial statements may be materially affected. Due to the business disruptions and challenges severely affecting the global economy caused by the COVID-19 pandemic, many lessors may provide rent deferrals and other lease concessions to lessees. While the lease modification guidance in Accounting Standards Codification Topic 842, Leases ("Topic 842") addresses routine changes to lease terms resulting from negotiations between the lessee and the lessor, this guidance did not contemplate an exceptionally high volume of concessions being so rapidly executed to address the sudden liquidity constraints of certain lessees caused by the COVID-19 pandemic. In April 2020, the Financial Accounting Standards Board ("FASB") issued a document that allows lessors to elect not to evaluate whether lease-related relief provided to mitigate the economic effects of COVID-19 is a lease modification under Topic 842. This election would allow lessors to bypass a lease-by-lease analysis, and instead choose to either apply the lease modification accounting framework or not, with such election applied consistently to leases with similar characteristics and similar circumstances. Entities making this election would continue to recognize property rental revenue on a straight-line basis. Rent abatements would be recognized as reductions to property rental revenue during the period for which they relate. Rent deferrals would not impact the recognition of property rental revenue, but would result in an increase to tenant receivables during the deferral period. We are evaluating this policy election and have not determined if we will evaluate any lease-related relief we provide to mitigate the economic effects of COVID-19 as a lease modification under Topic 842. While we did not grant any lease-related relief as a result of COVID-19 during the three months ended March 31, 2020, we are in discussions with tenants and have granted rent concessions or other lease-related relief since March 31, 2020, and expect to grant additional lease-related relief, such as the deferral of lease payments, for a period of time. The nature and financial impact of such rent relief is currently unknown as negotiations are in progress. Recent Accounting Pronouncements In March 2020, the FASB issued Accounting Standards Update 2020-04, Reference Rate Reform ("Topic 848"). Topic 848 contains practical expedients for reference rate reform related activities that impact debt, leases, derivatives and other contracts. The guidance in Topic 848 is optional and may be elected over time as reference rate reform activities occur. During the three months ended March 31, 2020, we elected to apply the hedge accounting expedients related to (i) the assertion that our hedged forecasted transactions remain probable and (ii) the assessments of effectiveness for future LIBOR-indexed cash flows to assume that the index upon which future hedged transactions will be based matches the index on the corresponding derivatives. Application of these expedients preserves the presentation of our derivatives, which will be consistent with our past presentation. We will continue to evaluate the impact of the guidance and may apply other elections, as applicable, as additional changes in the market occur.

Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2020

Summary of Significant Accounting Policies

2.Summary of Significant Accounting Policies

Significant Accounting Policies

There were no material changes to our significant accounting policies disclosed in our Annual Report on Form 10-K for the year ended December 31, 2019.

Use of Estimates

The preparation of the 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 financial statements and the reported amounts of revenue and expenses during the reporting period. The most significant of these estimates include: (i) the underlying cash flows and holding periods used in assessing impairment; (ii) the determination of useful lives for tangible and intangible assets; and (iii) the assessment of the collectability of receivables, including deferred rent receivables. Due to the current pandemic of the novel coronavirus, or COVID-19, commencing in March 2020, authorities in jurisdictions where our properties are located issued stay-at-home orders and restrictions on travel and the types of businesses permitted to continue operations. The extent to which the COVID-19 pandemic impacts

us and our tenants will depend on future developments, which are highly uncertain and cannot be predicted. The extent and duration of the stay-at-home orders and other effects of COVID-19 on us and our tenants will effect estimates used in the preparation of the underlying cash flows used in assessing our long-lived assets for impairment and the assessment of the collectability of receivables from tenants, including deferred rent receivables. We have made, what we believe to be, appropriate accounting estimates based on the facts and circumstances available as of the reporting date. To the extent these estimates differ from actual results, our consolidated financial statements may be materially affected.

Due to the business disruptions and challenges severely affecting the global economy caused by the COVID-19 pandemic, many lessors may provide rent deferrals and other lease concessions to lessees. While the lease modification guidance in Accounting Standards Codification Topic 842, Leases ("Topic 842") addresses routine changes to lease terms resulting from negotiations between the lessee and the lessor, this guidance did not contemplate an exceptionally high volume of concessions being so rapidly executed to address the sudden liquidity constraints of certain lessees caused by the COVID-19 pandemic. In April 2020, the Financial Accounting Standards Board ("FASB") issued a document that allows lessors to elect not to evaluate whether lease-related relief provided to mitigate the economic effects of COVID-19 is a lease modification under Topic 842. This election would allow lessors to bypass a lease-by-lease analysis, and instead choose to either apply the lease modification accounting framework or not, with such election applied consistently to leases with similar characteristics and similar circumstances. Entities making this election would continue to recognize property rental revenue on a straight-line basis. Rent abatements would be recognized as reductions to property rental revenue during the period for which they relate. Rent deferrals would not impact the recognition of property rental revenue, but would result in an increase to tenant receivables during the deferral period. We are evaluating this policy election and have not determined if we will evaluate any lease-related relief we provide to mitigate the economic effects of COVID-19 as a lease modification under Topic 842. While we did not grant any lease-related relief as a result of COVID-19 during the three months ended March 31, 2020, we are in discussions with tenants and have granted rent concessions or other lease-related relief since March 31, 2020, and expect to grant additional lease-related relief, such as the deferral of lease payments, for a period of time. The nature and financial impact of such rent relief is currently unknown as negotiations are in progress.

Recent Accounting Pronouncements

In March 2020, the FASB issued Accounting Standards Update 2020-04, Reference Rate Reform ("Topic 848"). Topic 848 contains practical expedients for reference rate reform related activities that impact debt, leases, derivatives and other contracts. The guidance in Topic 848 is optional and may be elected over time as reference rate reform activities occur. During the three months ended March 31, 2020, we elected to apply the hedge accounting expedients related to (i) the assertion that our hedged forecasted transactions remain probable and (ii) the assessments of effectiveness for future LIBOR-indexed cash flows to assume that the index upon which future hedged transactions will be based matches the index on the corresponding derivatives. Application of these expedients preserves the presentation of our derivatives, which will be consistent with our past presentation. We will continue to evaluate the impact of the guidance and may apply other elections, as applicable, as additional changes in the market occur.