Recent Accounting Pronouncements (Policies)	3 Months Ended
Mar. 31, 2019
Accounting Policies [Abstract]
Recent Accounting Pronouncements	In February 2016, the FASB issued ASU No. 2016-02 - Leases (Topic 842), which sets out the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e. lessees and lessors). The guidance amended the existing accounting standards, including the requirement that lessees recognize right-of-use assets and lease liabilities for leases with terms greater than twelve months on their condensed consolidated balance sheet. It also requires disclosures designed to give financial statement users information regarding amount, timing, and uncertainty of cash flows arising from leases. The FASB issued ASU 2018-11, "Leases (Topic 842) Targeted Improvements" in July 2018, which provides lessors with a practical expedient, by class of underlying assets, to not separate non-lease components from the related lease components, and, instead, to account for those components as a single lease component, if certain criteria are met. We adopted Topic 842 on January 1, 2019, the date it became effective for public companies, and applied the new leasing standard to leases in place as of the effective date using the modified retrospective transition method. We applied Topic 842 to all leases as of January 1, 2019 with comparative periods continuing to be reported under Topic 840. We elected the package of practical expedients and were not required to reassess the following upon adoption: (i) whether an expired or existing contract met the definition of a lease; (ii) the lease classification at January 1, 2019 for existing leases; and (iii) whether leasing costs previously capitalized as initial direct costs would continue to be amortized. This allowed us to continue to account for our existing ground and office space leases as operating leases. Upon adoption, we did not have an adjustment to the opening balance of retained earnings due to the election of these practical expedients. The package of practical expedients provided to lessors allowed us not to separate expenses reimbursed by our customers (“rental recoveries”) from the associated rental revenue if certain criteria were met. We assessed these criteria and concluded that the timing and pattern of transfer for rental revenue and the associated rental recoveries are the same and as our leases qualify as operating leases, we accounted for and presented rental revenue and rental recoveries (UHS facilities and Non-related parties) as a single component under Lease revenues in our condensed consolidated statements of income for the three months ended March 31, 2019 and 2018. Upon adoption, we recognized right-of-use assets and lease liabilities for ground leases in which we are the lessee with various third parties, including subsidiaries of UHS, at fourteen of our consolidated properties on the condensed consolidated balance sheet. See Note 7 for further disclosure around our adoption of the new lease standard.

Recent Accounting Pronouncements (Policies)

3 Months Ended

Mar. 31, 2019

In February 2016, the FASB issued ASU No. 2016-02 - Leases (Topic 842), which sets out the principles for the recognition, measurement, presentation and disclosure of leases for both parties to a contract (i.e. lessees and lessors). The guidance amended the existing accounting standards, including the requirement that lessees recognize right-of-use assets and lease liabilities for leases with terms greater than twelve months on their condensed consolidated balance sheet. It also requires disclosures designed to give financial statement users information regarding amount, timing, and uncertainty of cash flows arising from leases. The FASB issued ASU 2018-11, "Leases (Topic 842) Targeted Improvements" in July 2018, which provides lessors with a practical expedient, by class of underlying assets, to not separate non-lease components from the related lease components, and, instead, to account for those components as a single lease component, if certain criteria are met.

We adopted Topic 842 on January 1, 2019, the date it became effective for public companies, and applied the new leasing standard to leases in place as of the effective date using the modified retrospective transition method. We applied Topic 842 to all leases as of January 1, 2019 with comparative periods continuing to be reported under Topic 840. We elected the package of practical expedients and were not required to reassess the following upon adoption: (i) whether an expired or existing contract met the definition of a lease; (ii) the lease classification at January 1, 2019 for existing leases; and (iii) whether leasing costs previously capitalized as initial direct costs would continue to be amortized. This allowed us to continue to account for our existing ground and office space leases as operating leases. Upon adoption, we did not have an adjustment to the opening balance of retained earnings due to the election of these practical expedients. The package of practical expedients provided to lessors allowed us not to separate expenses reimbursed by our customers (“rental recoveries”) from the associated rental revenue if certain criteria were met. We assessed these criteria and concluded that the timing and pattern of transfer for rental revenue and the associated rental recoveries are the same and as our leases qualify as operating leases, we accounted for and presented rental revenue and rental recoveries (UHS facilities and Non-related parties) as a single component under Lease revenues in our condensed consolidated statements of income for the three months ended March 31, 2019 and 2018. Upon adoption, we recognized right-of-use assets and lease liabilities for ground leases in which we are the lessee with various third parties, including subsidiaries of UHS, at fourteen of our consolidated properties on the condensed consolidated balance sheet.

See Note 7 for further disclosure around our adoption of the new lease standard.