SEGMENT INFORMATION - Revenue and Net Real Estate Property (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Revenues:
Total revenues	$ 1,149,832	$ 1,037,276	$ 3,333,435	$ 3,077,768
Net Real Estate Property:
Total net real estate property	22,088,781		22,088,781		$ 21,160,450
United States
Revenues:
Total revenues	1,025,544	918,106	2,967,419	2,719,097
Net Real Estate Property:
Total net real estate property	19,110,447		19,110,447		18,168,224
Canada
Revenues:
Total revenues	116,926	112,550	344,372	337,503
Net Real Estate Property:
Total net real estate property	2,775,041		2,775,041		2,782,350
United Kingdom
Revenues:
Total revenues	7,362	$ 6,620	21,644	$ 21,168
Net Real Estate Property:
Total net real estate property	$ 203,293		$ 203,293		$ 209,876