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Related Party Transactions - Summary of Fees and Revenue Related to the Managed REITs (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Related Party Transaction [Line Items]      
Managed REIT Platform Revenues $ 12,227 $ 11,940 $ 7,819
Sponsor funding reduction [1] (844) (34) 0
Total Managed REIT Platform Revenues 11,383 11,906 7,819
Asset Management      
Related Party Transaction [Line Items]      
Managed REIT Platform Revenues 5,660 4,437 2,292
Property Management      
Related Party Transaction [Line Items]      
Managed REIT Platform Revenues 3,274 2,339 1,454
Tenant Protection Program      
Related Party Transaction [Line Items]      
Managed REIT Platform Revenues 2,003 1,299 842
Acquisition Fees      
Related Party Transaction [Line Items]      
Managed REIT Platform Revenues 327 3,307 2,692
Strategic Storage Growth Trust II Advisory Agreement | Asset Management      
Related Party Transaction [Line Items]      
Managed REIT Platform Revenues [2] 0 0 798
Strategic Storage Trust V I Advisory Agreement | Asset Management      
Related Party Transaction [Line Items]      
Managed REIT Platform Revenues 4,254 3,420 1,348
Strategic Storage Trust V I Advisory Agreement | Property Management      
Related Party Transaction [Line Items]      
Managed REIT Platform Revenues 1,698 1,243 551
Strategic Storage Trust V I Advisory Agreement | Tenant Protection Program      
Related Party Transaction [Line Items]      
Managed REIT Platform Revenues 1,205 842 397
Strategic Storage Growth Trust I I I Advisory Agreement | Asset Management      
Related Party Transaction [Line Items]      
Managed REIT Platform Revenues 1,406 1,017 146
JV Properties Property Management Agreement | Property Management      
Related Party Transaction [Line Items]      
Managed REIT Platform Revenues 959 738 433
JV Properties Property Management Agreement | Tenant Protection Program      
Related Party Transaction [Line Items]      
Managed REIT Platform Revenues 371 271 187
Strategic Storage Growth Trust II Property Management Agreement | Property Management      
Related Party Transaction [Line Items]      
Managed REIT Platform Revenues [2] 0 0 408
Strategic Storage Growth Trust I I I Property Management Agreement | Property Management      
Related Party Transaction [Line Items]      
Managed REIT Platform Revenues 617 358 62
Strategic Storage Growth Trust II Tenant Program Revenue | Tenant Protection Program      
Related Party Transaction [Line Items]      
Managed REIT Platform Revenues [2] 0 0 250
Strategic Storage Growth Trust I I I Tenant Protection Program Revenue | Tenant Protection Program      
Related Party Transaction [Line Items]      
Managed REIT Platform Revenues 427 186 8
Strategic Storage Trust VI Acquisition Fees Revenue | Acquisition Fees      
Related Party Transaction [Line Items]      
Managed REIT Platform Revenues 34 2,470 1,846
Strategic Storage Growth Trust III Acquisition Fees Revenue | Acquisition Fees      
Related Party Transaction [Line Items]      
Managed REIT Platform Revenues 293 837 846
Other Managed REIT Revenue      
Related Party Transaction [Line Items]      
Managed REIT Platform Revenues [3] $ 963 $ 558 $ 539
[1] Pursuant to the Sponsor Funding Agreement, SmartStop funds certain costs of SST VI’s share sales, and in return receives Series C Units in SST VI’s OP. The excess of the funding over the value of the Series C Units received is accounted for as a reduction of Managed REIT Platform revenues from SST VI over the remaining estimated term of the management contracts with SST VI.
[2] On June 1, 2022, we acquired SSGT II and no longer earn such fees. Additionally, the Tenant Protection Program revenue for SSGT II is now included in ancillary operating revenue in our consolidated statements of operations.
[3] Such revenue primarily includes other property management related fees, construction management fees, development fees, and other miscellaneous revenues.