SEGMENT INFORMATION - Revenue and Net Real Estate Property (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
Dec. 31, 2015 |
|
| Revenues: | |||||
| Total revenues | $ 867,116 | $ 827,606 | $ 2,567,809 | $ 2,445,124 | |
| Net real estate property: | |||||
| Total net real estate property | 20,601,402 | 20,601,402 | $ 19,625,220 | ||
| United States | |||||
| Revenues: | |||||
| Total revenues | 815,719 | 777,320 | 2,417,314 | 2,294,780 | |
| Net real estate property: | |||||
| Total net real estate property | 19,266,865 | 19,266,865 | 18,271,829 | ||
| Canada | |||||
| Revenues: | |||||
| Total revenues | 45,021 | 42,756 | 130,195 | 131,542 | |
| Net real estate property: | |||||
| Total net real estate property | 1,066,924 | 1,066,924 | 1,039,561 | ||
| United Kingdom | |||||
| Revenues: | |||||
| Total revenues | 6,376 | $ 7,530 | 20,300 | $ 18,802 | |
| Net real estate property: | |||||
| Total net real estate property | $ 267,613 | $ 267,613 | $ 313,830 | ||