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STORAGE PROPERTIES - Summary (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
STORAGE FACILITIES      
Storage properties $ 7,628,774 $ 7,367,613  
Less: Accumulated depreciation (1,590,588) (1,416,377)  
Storage properties, net 6,038,186 5,951,236 $ 6,048,003
Land      
STORAGE FACILITIES      
Storage properties 1,645,549 1,594,742  
Buildings and improvements      
STORAGE FACILITIES      
Storage properties 5,759,848 5,517,544  
Equipment      
STORAGE FACILITIES      
Storage properties 147,709 144,372  
Construction in progress      
STORAGE FACILITIES      
Storage properties 33,723 69,010  
Right-of-use assets - finance leases      
STORAGE FACILITIES      
Storage properties $ 41,945 $ 41,945