Leases	9 Months Ended
Leases	Sep. 30, 2021
Leases [Abstract]
Leases	Leases We are a lessor of medical office and life science properties, senior living communities and other healthcare related properties. Our leases provide our tenants with the contractual right to use and economically benefit from all of the premises demised under the leases; therefore, we have determined to evaluate our leases as lease arrangements. Certain of our leases provide for base rent payments and in addition may include variable payments. Rental income from operating leases, including any payments derived by index or market based indices, is recognized on a straight line basis over the lease term when we have determined that the collectability of substantially all of the lease payments is probable. Some of our leases have options to extend or terminate the lease exercisable at the option of our tenants, which are considered when determining the lease term. We increased rental income to record revenue on a straight line basis by $1,679 and $491 for the three months ended September 30, 2021 and 2020, respectively, and $3,804 and $3,029 for the nine months ended September 30, 2021 and 2020, respectively. Rents receivable, excluding receivables related to our properties classified as held for sale, if any, include $108,180 and $104,803 of straight line rent receivables at September 30, 2021 and December 31, 2020, respectively, and are included in other assets, net in our condensed consolidated balance sheets. We do not include in our measurement of our lease receivables certain variable payments, including changes in the index or market based indices after the inception of the lease, certain tenant reimbursements and other income until the specific events that trigger the variable payments have occurred. Such payments totaled $17,930 and $18,501 for the three months ended September 30, 2021 and 2020, respectively, of which tenant reimbursements totaled $17,875 and $18,550, respectively, and $54,634 and $56,792 for the nine months ended September 30, 2021 and 2020, respectively, of which tenant reimbursements totaled $54,495 and $56,742, respectively. Certain of our tenants requested relief from their obligations to pay rent due to us in response to the current economic conditions resulting from the COVID-19 pandemic. In most cases, these tenants granted deferrals were obligated to pay the deferred rents in 12 equal monthly installments beginning in September 2020. As of September 30, 2021 and December 31, 2020, deferred payments totaling $84 and $1,486, respectively, are included in other assets, net in our condensed consolidated balance sheets. These deferred amounts did not negatively impact our operating results for the three or nine months ended September 30, 2021 or 2020. Right of Use Asset and Lease Liability. For leases where we are the lessee, we recognized a right of use asset and a lease liability equal to the present value of the minimum lease payments with rental payments being applied to the lease liability and the right of use asset being amortized over the term of the lease. The values of the right of use asset and related liability representing our future obligation under the lease arrangement for which we are the lessee were $4,174 and $4,366, respectively, as of September 30, 2021, and $4,237 and $4,410, respectively, as of December 31, 2020. The right of use asset and related lease liability are included within other assets, net and other liabilities, respectively, within our condensed consolidated balance sheets. In addition, we lease equipment at certain of our managed senior living communities. These leases are short term in nature, are cancelable with no fee or do not result in an annual expense in excess of our capitalization policy and, as a result, are not recorded on our condensed consolidated balance sheets.