CONCENTRATION OF CREDIT RISK	3 Months Ended
Mar. 31, 2015
Risks and Uncertainties [Abstract]
CONCENTRATION OF CREDIT RISK	CONCENTRATION OF CREDIT RISK As of March 31, 2015, Atria, Sunrise, Brookdale Senior Living and Kindred managed or operated approximately 21.1%, 11.0%, 8.2% and 2.0%, respectively, of our real estate investments based on gross book value (excluding properties classified as held for sale as of March 31, 2015). Seniors housing communities constituted approximately 61.5% of our real estate investments based on gross book value (excluding properties classified as held for sale as of March 31, 2015), while MOBs, skilled nursing and other facilities, and hospitals collectively comprised the remaining 38.5%. Our properties were located in 47 states, the District of Columbia, seven Canadian provinces and the United Kingdom as of March 31, 2015, with properties in one state (California) accounting for more than 10% of our total revenues and total net operating income (“NOI,” which is defined as total revenues, excluding interest and other income, less property-level operating expenses and medical office building services costs) for the three months then ended. Triple-Net Leased Properties For the three months ended March 31, 2015 and 2014, approximately 5.5% and 5.5%, respectively, of our total revenues and 9.1% and 9.0%, respectively, of our total NOI (in each case excluding amounts in discontinued operations) were derived from our lease agreements with Brookdale Senior Living. For the same periods, approximately 5.3% and 7.4%, respectively, of our total revenues and 8.8% and 12.2%, respectively, of our total NOI (in each case excluding amounts in discontinued operations) were derived from our lease agreements with Kindred. Each of our leases with Brookdale Senior Living and Kindred is a triple-net lease that obligates the tenant to pay all property-related expenses, including maintenance, utilities, repairs, taxes, insurance and capital expenditures, and to comply with the terms of the mortgage financing documents, if any, affecting the properties. In addition, each of these leases has guaranty and cross-default provisions tied to other leases with the same tenant or its affiliates, as well as bundled lease renewals. The properties we lease to Brookdale Senior Living and Kindred accounted for a significant portion of our triple-net leased properties segment revenues and NOI for the three months ended March 31, 2015 and 2014. If either Brookdale Senior Living or Kindred becomes unable or unwilling to satisfy its obligations to us or to renew its leases with us upon expiration of the terms thereof, our financial condition and results of operations could decline and our ability to service our indebtedness and to make distributions to our stockholders could be limited. We cannot assure you that Brookdale Senior Living and Kindred will have sufficient assets, income and access to financing to enable them to satisfy their respective obligations to us, and any failure, inability or unwillingness by Brookdale Senior Living or Kindred to do so could have a material adverse effect on our business, financial condition, results of operations and liquidity, our ability to service our indebtedness and other obligations and our ability to make distributions to our stockholders, as required for us to continue to qualify as a REIT (a “Material Adverse Effect”). We also cannot assure you that Brookdale Senior Living and Kindred will elect to renew their respective leases with us upon expiration of the leases or that we will be able to reposition any non-renewed properties on a timely basis or on the same or better economic terms, if at all. In December 2014, we entered into favorable agreements with Kindred to transition or sell the operations of nine licensed healthcare assets, make modifications to the master leases governing 34 leased assets, and reimburse us for certain deferred capital expenditures at skilled nursing facilities previously transferred to new operators. In January 2015, Kindred paid us $37 million in connection with these agreements, which is being amortized over the remaining lease term for the 34 assets governed by the modified master leases. We own or have the rights to all licenses and CONs at the nine properties to be transitioned or sold, and Kindred has extensive and detailed obligations to cooperate and ensure an orderly transition of the properties to another operator. Senior Living Operations As of March 31, 2015, Atria and Sunrise, collectively, provided comprehensive property management and accounting services with respect to 269 of our seniors housing communities, for which we pay annual management fees pursuant to long-term management agreements. Because Atria and Sunrise manage our properties in exchange for the receipt of a management fee from us, we are not directly exposed to the credit risk of our managers in the same manner or to the same extent as our triple-net tenants. However, we rely on our managers’ personnel, expertise, technical resources and information systems, proprietary information, good faith and judgment to manage our senior living operations efficiently and effectively. We also rely on our managers to set appropriate resident fees and otherwise operate our seniors housing communities in compliance with the terms of our management agreements and all applicable laws and regulations. Although we have various rights as the property owner under our management agreements, including various rights to terminate and exercise remedies under the agreements as provided therein, Atria’s or Sunrise’s failure, inability or unwillingness to satisfy its respective obligations under those agreements, to efficiently and effectively manage our properties or to provide timely and accurate accounting information with respect thereto could have a Material Adverse Effect on us. In addition, significant changes in Atria’s or Sunrise’s senior management or equity ownership or any adverse developments in their businesses and affairs or financial condition could have a Material Adverse Effect on us. Our 34% ownership interest in Atria entitles us to certain rights and minority protections, as well as the right to appoint two of five members on the Atria Board of Directors. Brookdale Senior Living, Kindred, Atria and Sunrise Information Each of Brookdale Senior Living and Kindred is subject to the reporting requirements of the SEC and is required to file with the SEC annual reports containing audited financial information and quarterly reports containing unaudited financial information. The information related to Brookdale Senior Living and Kindred contained or referred to in this Quarterly Report on Form 10-Q has been derived from SEC filings made by Brookdale Senior Living or Kindred, as the case may be, or other publicly available information, or was provided to us by Brookdale Senior Living or Kindred, and we have not verified this information through an independent investigation or otherwise. We have no reason to believe that this information is inaccurate in any material respect, but we cannot assure you of its accuracy. We are providing this data for informational purposes only, and you are encouraged to obtain Brookdale Senior Living’s and Kindred’s publicly available filings, which can be found at the SEC’s website at www.sec.gov. Neither Atria nor Sunrise is currently subject to the reporting requirements of the SEC. The information related to Atria and Sunrise contained or referred to within this Quarterly Report on Form 10-Q has been derived from publicly available information or was provided to us by Atria or Sunrise, as the case may be, and we have not verified this information through an independent investigation or otherwise. We have no reason to believe that this information is inaccurate in any material respect, but we cannot assure you of its accuracy.

CONCENTRATION OF CREDIT RISK

As of March 31, 2015, Atria, Sunrise, Brookdale Senior Living and Kindred managed or operated approximately 21.1%, 11.0%, 8.2% and 2.0%, respectively, of our real estate investments based on gross book value (excluding properties classified as held for sale as of March 31, 2015). Seniors housing communities constituted approximately 61.5% of our real estate investments based on gross book value (excluding properties classified as held for sale as of March 31, 2015), while MOBs, skilled nursing and other facilities, and hospitals collectively comprised the remaining 38.5%. Our properties were located in 47 states, the District of Columbia, seven Canadian provinces and the United Kingdom as of March 31, 2015, with properties in one state (California) accounting for more than 10% of our total revenues and total net operating income (“NOI,” which is defined as total revenues, excluding interest and other income, less property-level operating expenses and medical office building services costs) for the three months then ended.

Triple-Net Leased Properties

For the three months ended March 31, 2015 and 2014, approximately 5.5% and 5.5%, respectively, of our total revenues and 9.1% and 9.0%, respectively, of our total NOI (in each case excluding amounts in discontinued operations) were derived from our lease agreements with Brookdale Senior Living. For the same periods, approximately 5.3% and 7.4%, respectively, of our total revenues and 8.8% and 12.2%, respectively, of our total NOI (in each case excluding amounts in discontinued operations) were derived from our lease agreements with Kindred. Each of our leases with Brookdale Senior Living and Kindred is a triple-net lease that obligates the tenant to pay all property-related expenses, including maintenance, utilities, repairs, taxes, insurance and capital expenditures, and to comply with the terms of the mortgage financing documents, if any, affecting the properties. In addition, each of these leases has guaranty and cross-default provisions tied to other leases with the same tenant or its affiliates, as well as bundled lease renewals.

The properties we lease to Brookdale Senior Living and Kindred accounted for a significant portion of our triple-net leased properties segment revenues and NOI for the three months ended March 31, 2015 and 2014. If either Brookdale Senior Living or Kindred becomes unable or unwilling to satisfy its obligations to us or to renew its leases with us upon expiration of the terms thereof, our financial condition and results of operations could decline and our ability to service our indebtedness and to make distributions to our stockholders could be limited. We cannot assure you that Brookdale Senior Living and Kindred will have sufficient assets, income and access to financing to enable them to satisfy their respective obligations to us, and any failure, inability or unwillingness by Brookdale Senior Living or Kindred to do so could have a material adverse effect on our business, financial condition, results of operations and liquidity, our ability to service our indebtedness and other obligations and our ability to make distributions to our stockholders, as required for us to continue to qualify as a REIT (a “Material Adverse Effect”). We also cannot assure you that Brookdale Senior Living and Kindred will elect to renew their respective leases with us upon expiration of the leases or that we will be able to reposition any non-renewed properties on a timely basis or on the same or better economic terms, if at all.

In December 2014, we entered into favorable agreements with Kindred to transition or sell the operations of nine licensed healthcare assets, make modifications to the master leases governing 34 leased assets, and reimburse us for certain deferred capital expenditures at skilled nursing facilities previously transferred to new operators. In January 2015, Kindred paid us $37 million in connection with these agreements, which is being amortized over the remaining lease term for the 34 assets governed by the modified master leases. We own or have the rights to all licenses and CONs at the nine properties to be transitioned or sold, and Kindred has extensive and detailed obligations to cooperate and ensure an orderly transition of the properties to another operator.

Senior Living Operations

As of March 31, 2015, Atria and Sunrise, collectively, provided comprehensive property management and accounting services with respect to 269 of our seniors housing communities, for which we pay annual management fees pursuant to long-term management agreements.

Because Atria and Sunrise manage our properties in exchange for the receipt of a management fee from us, we are not directly exposed to the credit risk of our managers in the same manner or to the same extent as our triple-net tenants. However, we rely on our managers’ personnel, expertise, technical resources and information systems, proprietary information, good faith and judgment to manage our senior living operations efficiently and effectively. We also rely on our managers to set appropriate resident fees and otherwise operate our seniors housing communities in compliance with the terms of our management agreements and all applicable laws and regulations. Although we have various rights as the property owner under our management agreements, including various rights to terminate and exercise remedies under the agreements as provided therein, Atria’s or Sunrise’s failure, inability or unwillingness to satisfy its respective obligations under those agreements, to efficiently and effectively manage our properties or to provide timely and accurate accounting information with respect thereto could have a Material Adverse Effect on us. In addition, significant changes in Atria’s or Sunrise’s senior management or equity ownership or any adverse developments in their businesses and affairs or financial condition could have a Material Adverse Effect on us.

Our 34% ownership interest in Atria entitles us to certain rights and minority protections, as well as the right to appoint two of five members on the Atria Board of Directors.

Brookdale Senior Living, Kindred, Atria and Sunrise Information

Each of Brookdale Senior Living and Kindred is subject to the reporting requirements of the SEC and is required to file with the SEC annual reports containing audited financial information and quarterly reports containing unaudited financial information. The information related to Brookdale Senior Living and Kindred contained or referred to in this Quarterly Report on Form 10-Q has been derived from SEC filings made by Brookdale Senior Living or Kindred, as the case may be, or other publicly available information, or was provided to us by Brookdale Senior Living or Kindred, and we have not verified this information through an independent investigation or otherwise. We have no reason to believe that this information is inaccurate in any material respect, but we cannot assure you of its accuracy. We are providing this data for informational purposes only, and you are encouraged to obtain Brookdale Senior Living’s and Kindred’s publicly available filings, which can be found at the SEC’s website at www.sec.gov.

Neither Atria nor Sunrise is currently subject to the reporting requirements of the SEC. The information related to Atria and Sunrise contained or referred to within this Quarterly Report on Form 10-Q has been derived from publicly available information or was provided to us by Atria or Sunrise, as the case may be, and we have not verified this information through an independent investigation or otherwise. We have no reason to believe that this information is inaccurate in any material respect, but we cannot assure you of its accuracy.