SEGMENT INFORMATION - Capital Expenditures (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2015 |
Jun. 30, 2014 |
Jun. 30, 2015 |
Jun. 30, 2014 |
|
| Segment Reporting Information [Line Items] | ||||
| Capital expenditures | $ 232,792 | $ 129,527 | $ 1,359,969 | $ 351,475 |
| Triple-Net Leased Properties | ||||
| Segment Reporting Information [Line Items] | ||||
| Capital expenditures | 102,971 | 57,380 | 559,989 | 249,432 |
| Senior Living Operations | ||||
| Segment Reporting Information [Line Items] | ||||
| Capital expenditures | 29,374 | 62,317 | 311,806 | 79,180 |
| MOB Operations | ||||
| Segment Reporting Information [Line Items] | ||||
| Capital expenditures | $ 100,447 | $ 9,830 | $ 488,174 | $ 22,863 |