Business and Property Management Agreements with RMR LLC	6 Months Ended
	Jun. 30, 2021
Related Party Transactions [Abstract]
Business and Property Management Agreements with RMR LLC	Business and Property Management Agreements with RMR LLCWe have no employees. The personnel and various services we require to operate our business are provided to us by RMR LLC. We have two agreements with RMR LLC to provide management services to us: (1) a business management agreement, which relates to our business generally; and (2) a property management agreement, which relates to the property level operations of our medical office and life science properties and major renovation or repositioning activities at our senior living communities. We also have a subsidiary level management agreement with RMR LLC related to the life science property located in Boston, Massachusetts, which we entered in connection with the joint venture arrangement for that life science property. Under that agreement, our subsidiary pays RMR LLC certain management fees directly, which fees are credited against the business management fees payable by us to RMR LLC. See Note 11 for further information regarding our relationship, agreements and transactions with RMR LLC. We recognized net business management fees of $6,324 and $4,841 for the three months ended June 30, 2021 and 2020, respectively, and $11,641 and $10,610 for the six months ended June 30, 2021 and 2020, respectively. The net business management fees we recognized include $725 and $1,450 of management fees related to our subsidiary level management agreement with RMR LLC entered in connection with our joint venture arrangement for the three and six months ended June 30, 2021 and 2020, respectively. Based on our common share total return, as defined in our business management agreement, as of each of June 30, 2021 and 2020, no estimated incentive fees are included in the net business management fees we recognized for the three or six months ended June 30, 2021 or 2020. The actual amount of annual incentive fees for 2021, if any, will be based on our common share total return as defined in our business management agreement, for the three-year period ending December 31, 2021, and will be payable in January 2022. We did not incur any incentive fee payable for the year ended December 31, 2020. We recognize business management and incentive fees in general and administrative expenses in our condensed consolidated statements of comprehensive income (loss). We recognized aggregate net property management and construction supervision fees payable to RMR LLC of $3,191 and $3,407 for the three months ended June 30, 2021 and 2020, respectively. Of those amounts, for the three months ended June 30, 2021 and 2020, $2,465 and $2,481, respectively, of property management fees were expensed to property operating expenses in our condensed consolidated statements of comprehensive income (loss) and $726 and $926, respectively, were capitalized as building improvements in our condensed consolidated balance sheets and are being depreciated over the estimated useful lives of the related capital assets. We recognized aggregate net property management and construction supervision fees of $6,345 and $6,599 for the six months ended June 30, 2021 and 2020, respectively. Of those amounts, for the six months ended June 30, 2021 and 2020, $4,950 and $5,077, respectively, of property management fees were expensed to property operating expenses in our condensed consolidated statements of comprehensive income (loss) and $1,395 and $1,522, respectively, were capitalized as building improvements in our condensed consolidated balance sheets and are being depreciated over the estimated useful lives of the related capital assets. We are generally responsible for all our operating expenses, including certain expenses incurred or arranged by RMR LLC on our behalf. We are generally not responsible for payment of RMR LLC's employment, office or administrative expenses incurred to provide management services to us, except for the employment and related expenses of RMR LLC's employees assigned to work exclusively or partly at our properties, our share of the wages, benefits and other related costs of RMR LLC's centralized accounting personnel, our share of RMR LLC's costs for providing our internal audit function, or as otherwise agreed. Our property level operating expenses are generally incorporated into the rents charged to our tenants, including certain payroll and related costs incurred by RMR LLC. We reimbursed RMR LLC $3,202 and $3,419 for these expenses and costs for the three months ended June 30, 2021 and 2020, respectively, and $6,499 and $6,862 for the six months ended June 30, 2021 and 2020, respectively. These amounts are included in property operating expenses and general and administrative expenses, as applicable, in our condensed consolidated statements of comprehensive income (loss). On June 9, 2021, we and RMR LLC amended our property management agreement to, among other things, provide for RMR LLC's oversight of any major capital projects and repositionings at our senior living communities, including our senior living communities which Five Star is continuing to manage, and that RMR LLC will receive the same fee previously paid to Five Star for such services, which is equal to 3% of the cost of any such major capital project or repositioning.