SELF STORAGE PROPERTIES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Real Estate [Abstract]
Land	$ 1,038,183		$ 1,038,183		$ 1,035,562
Buildings and improvements	4,768,865		4,768,865		4,746,105
Furniture and equipment	11,340		11,340		10,507
Total self storage properties	5,818,388		5,818,388		5,792,174
Less accumulated depreciation	(961,977)		(961,977)		(874,359)
Self storage properties, net	4,856,411		4,856,411		$ 4,917,815
Depreciation expense related to self storage properties	$ 45,400	$ 53,100	$ 90,800	$ 105,200