SEGMENT INFORMATION - Revenue and Net Real Estate Property (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Revenues:
Total revenues	$ 1,077,245	$ 1,017,554
Net Real Estate Property:
Total net real estate property	20,999,309		$ 21,160,450
United States
Revenues:
Total revenues	958,126	897,933
Net Real Estate Property:
Total net real estate property	18,002,715		18,168,224
Canada
Revenues:
Total revenues	112,122	112,144
Net Real Estate Property:
Total net real estate property	2,785,433		2,782,350
United Kingdom
Revenues:
Total revenues	6,997	$ 7,477
Net Real Estate Property:
Total net real estate property	$ 211,161		$ 209,876