v3.25.3
Related Party Transactions - Summary of Fees and Revenue Related to the Managed REITs (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Related Party Transaction [Line Items]        
Managed REIT Platform Revenues $ 4,114 $ 3,141 $ 12,769 $ 8,926
Sponsor funding reduction [1] (273) (218) (779) (598)
Total Managed REIT Platform Revenues 3,841 2,923 11,990 8,328
Asset Management        
Related Party Transaction [Line Items]        
Managed REIT Platform Revenues 1,669 1,449 4,675 4,247
Property Management        
Related Party Transaction [Line Items]        
Managed REIT Platform Revenues 1,108 834 3,179 2,354
Tenant Protection Program        
Related Party Transaction [Line Items]        
Managed REIT Platform Revenues 797 523 2,154 1,434
Acquisition Fees        
Related Party Transaction [Line Items]        
Managed REIT Platform Revenues 325 103 2,088 196
Strategic Storage Trust V I Advisory Agreement | Asset Management        
Related Party Transaction [Line Items]        
Managed REIT Platform Revenues 1,123 1,082 3,276 3,208
Strategic Storage Trust V I Advisory Agreement | Property Management        
Related Party Transaction [Line Items]        
Managed REIT Platform Revenues 507 436 1,459 1,244
Strategic Storage Trust V I Advisory Agreement | Tenant Protection Program        
Related Party Transaction [Line Items]        
Managed REIT Platform Revenues 365 317 1,034 883
Strategic Storage Trust V I Advisory Agreement | Acquisition Fees        
Related Party Transaction [Line Items]        
Managed REIT Platform Revenues 0 0 0 34
Strategic Storage Growth Trust I I I Advisory Agreement | Asset Management        
Related Party Transaction [Line Items]        
Managed REIT Platform Revenues 546 367 1,399 1,039
Strategic Storage Growth Trust I I I Property Management Agreement | Property Management        
Related Party Transaction [Line Items]        
Managed REIT Platform Revenues 371 150 971 407
Strategic Storage Growth Trust I I I Property Management Agreement | Tenant Protection Program        
Related Party Transaction [Line Items]        
Managed REIT Platform Revenues 320 106 798 281
Strategic Storage Growth Trust I I I Property Management Agreement | Acquisition Fees        
Related Party Transaction [Line Items]        
Managed REIT Platform Revenues 325 103 2,088 162
JV Properties Property Management Agreement | Property Management        
Related Party Transaction [Line Items]        
Managed REIT Platform Revenues 230 248 749 703
JV Properties Property Management Agreement | Tenant Protection Program        
Related Party Transaction [Line Items]        
Managed REIT Platform Revenues 112 100 322 270
Other Managed REIT Revenue        
Related Party Transaction [Line Items]        
Managed REIT Platform Revenues [2] $ 215 $ 232 $ 673 $ 695
[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. As of June 30, 2025, SST VI had closed its offering to new subscriptions. As such, we no longer had any funding obligation pursuant to the Sponsor Funding Agreement. The excess of the
funding over the value of the Series C Units received was 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] Such revenue primarily includes other property management related fees, construction management fees, development fees, and other miscellaneous revenues.