Leases and Management Agreements with Five Star	9 Months Ended
Sep. 30, 2017
Risks and Uncertainties [Abstract]
Leases and Management Agreements with Five Star	Leases and Management Agreements with Five Star Our Senior Living Communities Leased by Five Star. We are Five Star’s largest landlord and Five Star is our largest tenant. As of September 30, 2017 and 2016, we leased 185 and 183 senior living communities to Five Star, respectively. We lease senior living communities to Five Star pursuant to five leases with Five Star. We recognized total rental income from Five Star of $51,333, and $50,417 for the three months ended September 30, 2017 and 2016, respectively, and $153,441 and $146,758 for the nine months ended September 30, 2017 and 2016, respectively. These amounts exclude percentage rent payments we received from Five Star of $1,353 and $1,367 for the three months ended September 30, 2017 and 2016, respectively, and $4,190 and $4,228 for the nine months ended September 30, 2017 and 2016, respectively. We determine actual percentage rent due under our Five Star leases annually and recognize any resulting amount as rental income at year end when all contingencies are met. As of September 30, 2017 and December 31, 2016, we had rents receivable from Five Star of $17,120 and $18,320, respectively, which amounts are included in other assets in our condensed consolidated balance sheets. Rental income from Five Star represented 19.2% and 19.3% of our total revenues for the three and nine months ended September 30, 2017, respectively, and the properties Five Star leases from us represented 27.5% of our total gross book value of real estate assets as of September 30, 2017. Pursuant to the terms of our leases with Five Star, for the nine months ended September 30, 2017 and 2016, we funded $30,698 and $15,306, respectively, of improvements to communities leased to Five Star. As a result, the annual rent payable to us by Five Star increased by approximately $2,464 and $1,228, respectively. During the quarter ended June 30, 2017, we and Five Star agreed to amend the applicable lease for certain construction, expansion and development projects at two senior living communities we own and lease to Five Star. If and when Five Star requests that we purchase improvements related to these specific projects from them, Five Star’s annual rent payable to us will increase by an amount equal to the interest rate then applicable to our borrowings under our revolving credit facility plus 2% per annum of the amount we purchased. This amount of increased rent will apply until 12 months after a certificate of occupancy is issued with respect to the project; thereafter, Five Star’s annual rent payable to us will be revised to equal the amount determined pursuant to the capital improvement formula specified in the applicable lease. In August 2017, we acquired a land parcel from Five Star adjacent to a senior living community located in Delaware that we lease to Five Star for $750, excluding closing costs. This land parcel was added to the applicable lease and Five Star’s annual minimum rent payable to us increased by $33 in accordance with the terms of that lease. In June 2016, we acquired seven senior living communities from Five Star for an aggregate purchase price of $112,350, and we simultaneously leased these communities back to Five Star under a new long term lease agreement. Our Senior Living Communities Managed by Five Star. Five Star managed 68 and 63 senior living communities for our account as of September 30, 2017 and 2016, respectively. We lease our senior living communities that are managed by Five Star and include assisted living units or skilled nursing facility, or SNF, units to our TRSs and Five Star manages these communities pursuant to long term management agreements. We incurred management fees payable to Five Star of $3,414 and $3,070 for the three months ended September 30, 2017 and 2016, respectively, and $10,531 and $8,689 for the nine months ended September 30, 2017 and 2016, respectively. These amounts are included in property operating expenses or have been capitalized, as appropriate, in our condensed consolidated financial statements. In addition to management services to us, Five Star also provides certain other services to residents at some of the senior living communities it manages for us, such as rehabilitation services. At senior living communities Five Star manages for us where Five Star provides rehabilitation services on an outpatient basis, the residents, third party payers or government programs pay Five Star for those rehabilitation services. At senior living communities Five Star manages for us where Five Star provides both inpatient and outpatient rehabilitation services, we generally pay Five Star for these services and charges for these services are included in amounts charged to residents, third party payers or government programs. We incurred fees of $1,884 and $1,866 for the three months ended September 30, 2017 and 2016, respectively, and $5,713 and $5,755 for the nine months ended September 30, 2017 and 2016, respectively, for rehabilitation services Five Star provided at senior living communities it manages for us and that are payable by us; we include these amounts in property operating expenses in our condensed consolidated statement of comprehensive income. In November 2017, we entered a transaction agreement with Five Star pursuant to which we agreed to acquire six senior living communities from Five Star. We will enter management and pooling agreements with Five Star as we acquire these communities for Five Star to manage these senior living communities for us. The aggregate purchase price for these six senior living communities is approximately $104,000, including our assumption of approximately $33,696 of mortgage debt securing certain of these senior living communities and excluding closing costs. These acquisitions are subject to conditions, including our assumption of certain applicable mortgage debt and receipt of any applicable regulatory approvals. We expect to complete these acquisitions as third party approvals are received between now and the end of the first quarter of 2018; however, the conditions to our acquisitions of these senior living communities may not be met and some or all of these acquisitions and related management and pooling arrangements may not occur, may be delayed or the terms may change. The management agreements we and Five Star will enter in connection with our acquisitions of these senior living communities will be combined pursuant to two new pooling agreements to be entered between us and Five Star. The first new pooling agreement will combine the management agreements for five of these senior living communities. Pursuant to the terms of the management and pooling agreements to be entered for these five senior living communities, we will pay Five Star a management fee equal to 5% of the gross revenues realized at these communities plus reimbursement for Five Star’s direct costs and expenses related to its operation of these communities, as well as an annual incentive fee equal to 20% of the annual net operating income of such communities remaining after we realize an annual minimum return equal to 7% of our invested capital for these senior living communities. The second new pooling agreement will include one management agreement for a senior living community that is subject to an ongoing construction, expansion and development project. The terms of the management and pooling agreements to be entered for this senior living community will be substantially the same as the terms of the management and pooling agreements for the other five senior living communities, except that our annual minimum return on invested capital related to the ongoing, construction and development project at this community will be an amount equal to the interest rate then applicable to borrowings under our revolving credit facility plus 2% per annum. This amount of minimum return will apply until the earlier of 12 months after a certificate of occupancy is issued with respect to the project and the third anniversary of our acquisition of this community; thereafter, the amount of annual minimum return on invested capital related to this project will be 7% of our invested capital. Also pursuant to the terms of the management and pooling agreements to be entered for these six senior living communities, we will pay Five Star a fee for its management of capital expenditure projects at these senior living communities equal to 3% of amounts funded by us. The terms of these management and pooling agreements will expire in 2041 and will be subject to automatic renewals, unless earlier terminated or timely notices of nonrenewal are delivered. Also in November 2017, we amended our preexisting pooling agreements with Five Star, among other things, to provide that, with respect to our right to terminate all of the management agreements covered by a preexisting pooling agreement if we do not receive our annual minimum return under such agreement in each of three consecutive years, the commencement year for the measurement period for determining whether the specified annual minimum return under the applicable pooling agreement has been achieved will be 2017. During the quarter ended June 30, 2017, we and Five Star agreed to amend the applicable management and pooling agreements for a construction, expansion and development project at a senior living community that we own and that is managed by Five Star. Our minimum return on invested capital for this specific project will increase by an amount equal to the interest rate then applicable to our borrowings under our revolving credit facility plus 2% per annum. This amount of increased minimum return will apply until 12 months after a certificate of occupancy is issued with respect to the project; thereafter, the amount of annual minimum return on invested capital will be revised to equal the amount determined pursuant to the applicable management and pooling agreements. We and Five Star also agreed that the commencement of the measurement period for determining whether the specified annual minimum return under the applicable management and pooling agreements has been achieved will be deferred until 12 months after a certificate of occupancy is issued with respect to the project. Simultaneously with the June 2016 sale and leaseback transaction, we and Five Star terminated three of our four then existing pooling agreements and entered 10 new pooling agreements that combine our management agreements with Five Star for senior living communities that include assisted living units or SNF units. Pursuant to these management agreements and the pooling agreements, Five Star receives management fees equal to either 3% or 5% of the gross revenues realized at the applicable communities, reimbursement for its direct costs and expenses related to such communities, annual incentive fees if certain operating results at those communities are achieved and fees for its supervision of capital expenditure projects at those communities equal to 3% of amounts funded by us. Under the pooling agreements, the calculations of Five Star's fees and of our annual minimum returns related to management agreements that include assisted living units that became effective before May 2015 and had been pooled under one of the previously existing pooling agreements are generally the same as they were under the previously existing pooling agreements. However, for certain communities, the pooling agreements reduced our annual minimum returns, and, with respect to 10 communities, reset the annual minimum returns we receive before Five Star is paid incentive fees to specified amounts. For those management agreements that include assisted living units that became effective from and after May 2015, the pooling agreements increased the management fees Five Star receives from 3% to 5% of the gross revenues realized at the applicable communities, and changed the potential annual incentive fees from 35% to 20% of the annual net operating income, or NOI, of the applicable communities remaining after we realize our requisite annual minimum returns.

Leases and Management Agreements with Five Star

Our Senior Living Communities Leased by Five Star. We are Five Star’s largest landlord and Five Star is our largest tenant. As of September 30, 2017 and 2016, we leased 185 and 183 senior living communities to Five Star, respectively. We lease senior living communities to Five Star pursuant to five leases with Five Star. We recognized total rental income from Five Star of $51,333, and $50,417 for the three months ended September 30, 2017 and 2016, respectively, and $153,441 and $146,758 for the nine months ended September 30, 2017 and 2016, respectively. These amounts exclude percentage rent payments we received from Five Star of $1,353 and $1,367 for the three months ended September 30, 2017 and 2016, respectively, and $4,190 and $4,228 for the nine months ended September 30, 2017 and 2016, respectively. We determine actual percentage rent due under our Five Star leases annually and recognize any resulting amount as rental income at year end when all contingencies are met. As of September 30, 2017 and December 31, 2016, we had rents receivable from Five Star of $17,120 and $18,320, respectively, which amounts are included in other assets in our condensed consolidated balance sheets. Rental income from Five Star represented 19.2% and 19.3% of our total revenues for the three and nine months ended September 30, 2017, respectively, and the properties Five Star leases from us represented 27.5% of our total gross book value of real estate assets as of September 30, 2017.

Pursuant to the terms of our leases with Five Star, for the nine months ended September 30, 2017 and 2016, we funded $30,698 and $15,306, respectively, of improvements to communities leased to Five Star. As a result, the annual rent payable to us by Five Star increased by approximately $2,464 and $1,228, respectively. During the quarter ended June 30, 2017, we and Five Star agreed to amend the applicable lease for certain construction, expansion and development projects at two senior living communities we own and lease to Five Star. If and when Five Star requests that we purchase improvements related to these specific projects from them, Five Star’s annual rent payable to us will increase by an amount equal to the interest rate then applicable to our borrowings under our revolving credit facility plus 2% per annum of the amount we purchased. This amount of increased rent will apply until 12 months after a certificate of occupancy is issued with respect to the project; thereafter, Five Star’s annual rent payable to us will be revised to equal the amount determined pursuant to the capital improvement formula specified in the applicable lease.

In August 2017, we acquired a land parcel from Five Star adjacent to a senior living community located in Delaware that we lease to Five Star for $750, excluding closing costs. This land parcel was added to the applicable lease and Five Star’s annual minimum rent payable to us increased by $33 in accordance with the terms of that lease.

In June 2016, we acquired seven senior living communities from Five Star for an aggregate purchase price of $112,350, and we simultaneously leased these communities back to Five Star under a new long term lease agreement.

Our Senior Living Communities Managed by Five Star. Five Star managed 68 and 63 senior living communities for our account as of September 30, 2017 and 2016, respectively. We lease our senior living communities that are managed by Five Star and include assisted living units or skilled nursing facility, or SNF, units to our TRSs and Five Star manages these communities pursuant to long term management agreements. We incurred management fees payable to Five Star of $3,414 and $3,070 for the three months ended September 30, 2017 and 2016, respectively, and $10,531 and $8,689 for the nine months ended September 30, 2017 and 2016, respectively. These amounts are included in property operating expenses or have been capitalized, as appropriate, in our condensed consolidated financial statements.

In addition to management services to us, Five Star also provides certain other services to residents at some of the senior living communities it manages for us, such as rehabilitation services. At senior living communities Five Star manages for us where Five Star provides rehabilitation services on an outpatient basis, the residents, third party payers or government programs pay Five Star for those rehabilitation services. At senior living communities Five Star manages for us where Five Star provides both inpatient and outpatient rehabilitation services, we generally pay Five Star for these services and charges for these services are included in amounts charged to residents, third party payers or government programs. We incurred fees of $1,884 and $1,866 for the three months ended September 30, 2017 and 2016, respectively, and $5,713 and $5,755 for the nine months ended September 30, 2017 and 2016, respectively, for rehabilitation services Five Star provided at senior living communities it manages for us and that are payable by us; we include these amounts in property operating expenses in our condensed consolidated statement of comprehensive income.

In November 2017, we entered a transaction agreement with Five Star pursuant to which we agreed to acquire six senior living communities from Five Star. We will enter management and pooling agreements with Five Star as we acquire these communities for Five Star to manage these senior living communities for us. The aggregate purchase price for these six senior living communities is approximately $104,000, including our assumption of approximately $33,696 of mortgage debt securing certain of these senior living communities and excluding closing costs. These acquisitions are subject to conditions, including our assumption of certain applicable mortgage debt and receipt of any applicable regulatory approvals. We expect to complete these acquisitions as third party approvals are received between now and the end of the first quarter of 2018; however, the conditions to our acquisitions of these senior living communities may not be met and some or all of these acquisitions and related management and pooling arrangements may not occur, may be delayed or the terms may change.

The management agreements we and Five Star will enter in connection with our acquisitions of these senior living communities will be combined pursuant to two new pooling agreements to be entered between us and Five Star. The first new pooling agreement will combine the management agreements for five of these senior living communities. Pursuant to the terms of the management and pooling agreements to be entered for these five senior living communities, we will pay Five Star a management fee equal to 5% of the gross revenues realized at these communities plus reimbursement for Five Star’s direct costs and expenses related to its operation of these communities, as well as an annual incentive fee equal to 20% of the annual net operating income of such communities remaining after we realize an annual minimum return equal to 7% of our invested capital for these senior living communities. The second new pooling agreement will include one management agreement for a senior living community that is subject to an ongoing construction, expansion and development project. The terms of the management and pooling agreements to be entered for this senior living community will be substantially the same as the terms of the management and pooling agreements for the other five senior living communities, except that our annual minimum return on invested capital related to the ongoing, construction and development project at this community will be an amount equal to the interest rate then applicable to borrowings under our revolving credit facility plus 2% per annum. This amount of minimum return will apply until the earlier of 12 months after a certificate of occupancy is issued with respect to the project and the third anniversary of our acquisition of this community; thereafter, the amount of annual minimum return on invested capital related to this project will be 7% of our invested capital. Also pursuant to the terms of the management and pooling agreements to be entered for these six senior living communities, we will pay Five Star a fee for its management of capital expenditure projects at these senior living communities equal to 3% of amounts funded by us. The terms of these management and pooling agreements will expire in 2041 and will be subject to automatic renewals, unless earlier terminated or timely notices of nonrenewal are delivered.

Also in November 2017, we amended our preexisting pooling agreements with Five Star, among other things, to provide that, with respect to our right to terminate all of the management agreements covered by a preexisting pooling agreement if we do not receive our annual minimum return under such agreement in each of three consecutive years, the commencement year for the measurement period for determining whether the specified annual minimum return under the applicable pooling agreement has been achieved will be 2017.

During the quarter ended June 30, 2017, we and Five Star agreed to amend the applicable management and pooling agreements for a construction, expansion and development project at a senior living community that we own and that is managed by Five Star. Our minimum return on invested capital for this specific project will increase by an amount equal to the interest rate then applicable to our borrowings under our revolving credit facility plus 2% per annum. This amount of increased minimum return will apply until 12 months after a certificate of occupancy is issued with respect to the project; thereafter, the amount of annual minimum return on invested capital will be revised to equal the amount determined pursuant to the applicable management and pooling agreements. We and Five Star also agreed that the commencement of the measurement period for determining whether the specified annual minimum return under the applicable management and pooling agreements has been achieved will be deferred until 12 months after a certificate of occupancy is issued with respect to the project.

Simultaneously with the June 2016 sale and leaseback transaction, we and Five Star terminated three of our four then existing pooling agreements and entered 10 new pooling agreements that combine our management agreements with Five Star for senior living communities that include assisted living units or SNF units. Pursuant to these management agreements and the pooling agreements, Five Star receives management fees equal to either 3% or 5% of the gross revenues realized at the applicable communities, reimbursement for its direct costs and expenses related to such communities, annual incentive fees if certain operating results at those communities are achieved and fees for its supervision of capital expenditure projects at those communities equal to 3% of amounts funded by us.

Under the pooling agreements, the calculations of Five Star's fees and of our annual minimum returns related to management agreements that include assisted living units that became effective before May 2015 and had been pooled under one of the previously existing pooling agreements are generally the same as they were under the previously existing pooling agreements. However, for certain communities, the pooling agreements reduced our annual minimum returns, and, with respect to 10 communities, reset the annual minimum returns we receive before Five Star is paid incentive fees to specified amounts. For those management agreements that include assisted living units that became effective from and after May 2015, the pooling agreements increased the management fees Five Star receives from 3% to 5% of the gross revenues realized at the applicable communities, and changed the potential annual incentive fees from 35% to 20% of the annual net operating income, or NOI, of the applicable communities remaining after we realize our requisite annual minimum returns.