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Real Estate Facilities - Additional Information (Detail)
12 Months Ended
Dec. 01, 2022
RealEstateVenture
Jun. 28, 2022
USD ($)
Jun. 01, 2022
USD ($)
ft²
StorageProperty
State
StorageFacility
Landparcel
StorageUnit
RealEstateVenture
$ / shares
May 17, 2022
USD ($)
May 10, 2022
USD ($)
Feb. 08, 2022
USD ($)
Dec. 30, 2021
StorageFacility
Mar. 17, 2021
ft²
StorageUnit
StorageFacility
Nov. 10, 2020
USD ($)
RealEstateVenture
StorageFacility
State
Dec. 31, 2022
USD ($)
StorageFacility
RealEstateVenture
Property
State
$ / shares
Dec. 31, 2021
$ / shares
Business Acquisition [Line Items]                      
Number of self storage facilities | StorageFacility             2     153  
Number of states located for self storage facilities | State                   19  
Consideration transferred                   $ 51,200,000  
Minority and Marketability Discount                      
Business Acquisition [Line Items]                      
Alternative investment, measurement input     0.06           0.06    
Canada                      
Business Acquisition [Line Items]                      
Number of self storage units | RealEstateVenture     7,740                
SST IV Merger Agreement                      
Business Acquisition [Line Items]                      
Number of self storage facilities | StorageFacility               24      
Number of self storage units | StorageUnit               18,000      
Number of development joint venture properties | Property                   2  
Cost related to acquisition                 $ 8,400,000    
Percentage of voting membership interest               50.00%      
Net rentable area, primarily self storage space | ft²               2,000,000.0      
SST IV Merger Agreement | Canada                      
Business Acquisition [Line Items]                      
Number of self storage facilities | StorageFacility                 24    
Number of states located for self storage facilities | State                 9    
Number of self storage real estate joint ventures | RealEstateVenture                 6    
Number of development joint venture properties               3 3 5  
Number of development real estate properties               3 3 1  
Strategic Storage Trust IV, Inc.                      
Business Acquisition [Line Items]                      
Consideration transferred                 $ 286,028,173    
Algonquin Property [Member]                      
Business Acquisition [Line Items]                      
Consideration transferred           $ 19,000,000.0          
Occupancy percentage           72.40%          
SSGT II Merger Agreement                      
Business Acquisition [Line Items]                      
Conversion of right to receive shares, description     converted into the right to receive 0.9118 shares of our Class A Shares                
Number of self storage facilities | StorageFacility     10                
Number of states located for self storage facilities | State     7                
Number of self storage units | StorageUnit     7,740                
Number of development joint venture properties | Property                   1  
Cost related to acquisition     $ 2,000,000.0                
Consideration transferred     $ 261,158,513                
Common Stock, Par or Stated Value Per Share | $ / shares     $ 0.001                
Percentage of voting membership interest     50.00%                
Number of operating self storage properties | StorageProperty     2                
Number of land parcel developed into self storage facility | Landparcel     1                
Remaining percentage of membership interest     50.00%                
Net rentable area, primarily self storage space | ft²     853,900                
SSGT II Merger Agreement | Canada                      
Business Acquisition [Line Items]                      
Number of self storage real estate joint ventures | RealEstateVenture 3                    
Number of development joint venture properties | RealEstateVenture                   1  
Number of development real estate properties | RealEstateVenture                   2  
SSGT II Merger Agreement | CALIFORNIA                      
Business Acquisition [Line Items]                      
Number of land parcel developed into self storage facility | Landparcel     1                
Acquisition of Self Storage Facility                      
Business Acquisition [Line Items]                      
Net rentable area, primarily self storage space | ft²     853,900                
Sacramento II, CA                      
Business Acquisition [Line Items]                      
Consideration transferred         $ 25,400,000            
Occupancy percentage         90.30%            
St. Johns Property                      
Business Acquisition [Line Items]                      
Consideration transferred       $ 16,300,000              
Occupancy percentage       94.60%              
Aurora Property                      
Business Acquisition [Line Items]                      
Consideration transferred   $ 12,000,000.0                  
Occupancy percentage   82.20%                  
SST IV Common Stock                      
Business Acquisition [Line Items]                      
Conversion of right to receive shares, description                 converted into the right to receive 2.1875 Class A Shares    
Class A Common stock                      
Business Acquisition [Line Items]                      
Common Stock, Par or Stated Value Per Share | $ / shares                   $ 0.001 $ 0.001
Class A Common stock | Strategic Storage Trust IV, Inc.                      
Business Acquisition [Line Items]                      
Common stock issued                 $ 23,100,000    
Class A Common stock | SSGT II Merger Agreement                      
Business Acquisition [Line Items]                      
Common stock issued     $ 11,500,000