SEGMENT INFORMATION - Revenue and Net Real Estate Property (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Revenues:
Total revenues	$ 1,106,358	$ 1,022,938	$ 2,183,603	$ 2,040,492
Net Real Estate Property:
Total net real estate property	22,483,109		22,483,109		$ 21,160,450
United States
Revenues:
Total revenues	983,749	903,057	1,941,875	1,800,990
Net Real Estate Property:
Total net real estate property	19,423,245		19,423,245		18,168,224
Canada
Revenues:
Total revenues	115,324	112,809	227,446	224,953
Net Real Estate Property:
Total net real estate property	2,845,233		2,845,233		2,782,350
United Kingdom
Revenues:
Total revenues	7,285	$ 7,072	14,282	$ 14,549
Net Real Estate Property:
Total net real estate property	$ 214,631		$ 214,631		$ 209,876