v3.5.0.2

CONCENTRATION OF CREDIT RISK (Details) |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | ---
Oct. 01, 2016 USD ($) | Apr. 03, 2016 Lease | Apr. 30, 2016 USD ($) | Sep. 30, 2016 USD ($) board_member property state province | Sep. 30, 2015 USD ($) | Sep. 30, 2016 USD ($) board_member property state province | Sep. 30, 2015 USD ($)
Concentration Risk [Line Items] |  |  |  |  |  |  |
Number of states | state |  |  |  | 46 |  | 46 |
Number of Canadian provinces | province |  |  |  | 7 |  | 7 |
Impairment of real estate |  |  |  | $ 0 | $ 2,500,000 | $ 14,500,000 | $ 31,300,000
Rental income |  |  |  | $ 368,697,000 | $ 343,783,000 | $ 1,081,526,000 | $ 991,878,000
Atria |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |
Ownership interests accounted for under the equity method |  |  |  | 34.00% |  | 34.00% |
Number of board members appointed | board_member |  |  |  | 2 |  | 2 |
Number of board members | board_member |  |  |  | 6 |  | 6 |
LTACS |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |
Lease modifications, number of properties | Lease |  | 7 |  |  |  |  |
Original expected annual lease income |  |  |  | $ 8,000,000 |  | $ 8,000,000 |
Impairment of real estate |  |  |  |  |  | $ 10,300,000 |
Rental income |  |  | $ 3,500,000 |  |  |  |
Seniors Housing Communities |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |
Number of seniors housing communities under long-term management agreements | property |  |  |  | 298 |  | 298 |
Seniors Housing Communities | Atria and Sunrise |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |
Number of seniors housing communities under long-term management agreements | property |  |  |  | 266 |  | 266 |
Total gross book value of properties | Atria |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |
Concentration percentage |  |  |  |  |  | 22.40% |
Total gross book value of properties | Sunrise |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |
Concentration percentage |  |  |  |  |  | 11.20% |
Total gross book value of properties | Brookdale Senior Living |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |
Concentration percentage |  |  |  |  |  | 8.00% |
Total gross book value of properties | Kindred |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |
Concentration percentage |  |  |  |  |  | 1.70% |
Total gross book value of properties | Ardent |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |
Concentration percentage |  |  |  |  |  | 5.10% |
Total gross book value of properties | Seniors Housing Communities |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |
Concentration percentage |  |  |  |  |  | 61.40% |
Total gross book value of properties | Hospitals, Medical Office Building, and Other |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |
Concentration percentage |  |  |  |  |  | 38.60% |
Total revenues |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |
Number of states accounting for more than 10% of total revenues | state |  |  |  |  |  | 1 |
Total revenues | Brookdale Senior Living |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |
Concentration percentage |  |  |  | 4.80% | 5.10% |  |
Total revenues | Kindred |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |
Concentration percentage |  |  |  | 5.30% | 5.60% |  |
Total revenues | Ardent |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |
Concentration percentage |  |  |  | 3.10% |  |  |
Total NOI |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |
Number of states accounting for more than 10% of net operating income | state |  |  |  | 1 |  | 1 |
Total NOI | Brookdale Senior Living |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |
Concentration percentage |  |  |  | 8.20% | 8.90% |  |
Total NOI | Kindred |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |
Concentration percentage |  |  |  | 9.10% | 9.70% |  |
Total NOI | Ardent |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |
Concentration percentage |  |  |  | 5.30% |  |  |
Subsequent Event | LTACS |  |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |  |
Proceeds from sale of real estate | $ 3,000,000 |  |  |  |  |  |
Gain on sale of real estate | $ 2,800,000 |  |  |  |  |  |

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