Leases	9 Months Ended
Leases	Sep. 30, 2020
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 $491 and $1,186 for the three months ended September 30, 2020 and 2019, respectively, and $3,029 and $3,550 for the nine months ended September 30, 2020 and 2019, respectively. Rents receivable, excluding properties classified as held for sale, include $102,691 and $99,297 of straight line rent receivables at September 30, 2020 and December 31, 2019, 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. We recognized such payments totaling $18,501 and $19,317 for the three months ended September 30, 2020 and 2019, respectively, of which tenant reimbursements totaled $1,428 and $1,506, respectively, and $56,792 and $57,687 for the nine months ended September 30, 2020 and 2019, respectively, of which tenant reimbursements totaled $3,522 and $3,906, respectively. Certain of our tenants have requested relief from their obligations to pay rent due to us in response to the current economic conditions resulting from the COVID-19 pandemic. As of November 2, 2020, we granted requests for certain of our tenants to defer rent payments totaling $2,152. These tenants are obligated to pay, in most cases, the deferred rents in 12 equal monthly installments beginning in 2020. We have elected to use the FASB relief package regarding the application of lease accounting guidance to lease concessions provided as a result of the COVID-19 pandemic. The FASB relief package provides entities with the option to account for lease concessions resulting from the COVID-19 pandemic outside of the existing lease modification guidance if the resulting cash flows from the modified lease are substantially the same as the original lease. Because the majority of the deferred rents referenced above will generally be repaid, the cash flows from the respective leases are substantially the same as before the rent deferrals. These deferred amounts did not negatively impact our operating results for the three and nine months ended September 30, 2020 and, as of September 30, 2020, we recognized $4,467 in our accounts receivable related to these deferred amounts. 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 $4,256 and $4,423, respectively, as of September 30, 2020, and $4,319 and $4,461, respectively, as of December 31, 2019. 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.