v2.4.0.6

Concentration of Credit Risk (Details) | 12 Months Ended
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Dec. 31, 2012 province state | Dec. 31, 2011 | Dec. 31, 2010
Concentration of credit risk |  |  |
Number of states | 46 |  |
Number of Canadian provinces | 2 |  |
Revenue concentration risk percentage | 10.00% | 10.00% | 10.00%
Seniors housing communities |  |  |
Concentration of credit risk |  |  |
Number of seniors housing communities under long-term management agreements | 220 |  |
ATRIA |  |  |
Concentration of credit risk |  |  |
Ownership interests in properties accounted for under the equity method (as a percent) | 34.00% |  |
BROOKDALE SENIOR LIVING |  |  |
Concentration of credit risk |  |  |
Percentage of total revenues derived by third party | 6.40% | 7.70% | 10.90%
Percentage of net operating income derived from lease agreements | 10.50% | 12.50% | 16.20%
Total gross book value of properties | Seniors housing communities |  |  |
Concentration of credit risk |  |  |
Percentage of real estate investments based on gross book value (as a percent) | 61.20% |  |
Total gross book value of properties | Skilled nursing facilities, hospitals, MOBs and other healthcare assets |  |  |
Concentration of credit risk |  |  |
Percentage of real estate investments based on gross book value (as a percent) | 38.80% |  |
Total gross book value of properties | ATRIA |  |  |
Concentration of credit risk |  |  |
Percentage of real estate investments based on gross book value (as a percent) | 17.80% |  |
Total gross book value of properties | SUNRISE |  |  |
Concentration of credit risk |  |  |
Percentage of real estate investments based on gross book value (as a percent) | 14.80% |  |
Total gross book value of properties | BROOKDALE SENIOR LIVING |  |  |
Concentration of credit risk |  |  |
Percentage of real estate investments based on gross book value (as a percent) | 10.40% |  |
Total gross book value of properties | KINDRED |  |  |
Concentration of credit risk |  |  |
Percentage of real estate investments based on gross book value (as a percent) | 4.40% |  |
Total revenues | KINDRED |  |  |
Concentration of credit risk |  |  |
Percentage of real estate investments based on gross book value (as a percent) | 10.50% | 14.50% | 24.70%
Total NOI | KINDRED |  |  |
Concentration of credit risk |  |  |
Percentage of real estate investments based on gross book value (as a percent) | 17.40% | 23.70% | 36.60%
California | Total revenues or NOI |  |  |
Concentration of credit risk |  |  |
Number of states accounting for more than 10% of total revenues | 1 | 1 |
California and Illinois | Total revenues or NOI |  |  |
Concentration of credit risk |  |  |
Number of states accounting for more than 10% of total revenues |  |  | 2

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13537-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=7491637&loc=d3e13531-108611 + Details
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 18 -Subparagraph f -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 20 -Subparagraph a (1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Number of real estate properties for which an annual management fee is paid pursuant to long-term management agreements which provide for comprehensive property management and accounting services. + References No definition available. + Details
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