SEGMENT INFORMATION - Capital Expenditures (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Segment Reporting Information [Line Items] | ||||
| Capital expenditures | $ 1,440,229 | $ 1,363,289 | $ 1,591,286 | $ 2,723,258 |
| Operating Segments | Triple-Net Leased Properties | ||||
| Segment Reporting Information [Line Items] | ||||
| Capital expenditures | 12,992 | 1,318,868 | 69,642 | 1,878,857 |
| Operating Segments | Senior Living Operations | ||||
| Segment Reporting Information [Line Items] | ||||
| Capital expenditures | 26,495 | 34,104 | 70,297 | 345,910 |
| Operating Segments | Office Operations | ||||
| Segment Reporting Information [Line Items] | ||||
| Capital expenditures | $ 1,400,742 | $ 10,317 | $ 1,451,347 | $ 498,491 |