v3.25.4
Related Party Transactions - Summary of Related Party Carrying Value of Investments In Advances (Detail) - USD ($)
$ in Thousands
Dec. 31, 2025
Nov. 13, 2025
Dec. 31, 2024
Related Party Transaction [Line Items]      
Total investments in and advances to $ 130,961   $ 57,722
BD III DST Mortgage Loans      
Related Party Transaction [Line Items]      
Contractual Interest/Preferred Rate   1.50%  
SSGT III OP      
Related Party Transaction [Line Items]      
Receivables 15,878   2,769
Total investments in and advances to 32,849   15,511
SSGT III OP | SSGT III Bridge Loan      
Related Party Transaction [Line Items]      
Debt [1] 0   2,919
SSGT III OP | SSGT III Promissory Note      
Related Party Transaction [Line Items]      
Debt [1] 0   7,000
SSGT III OP | SSGT III OP Units and SSGT III SLP      
Related Party Transaction [Line Items]      
Equity 1,971   2,823
SSGT III OP | SSGT III-Blue Door III Bridge Loan      
Related Party Transaction [Line Items]      
Debt $ 15,000   0
Contractual Interest/Preferred Rate [2] 3.00%    
Effective Interest/Preferred Rate [2] 6.87%    
Maturity Date [2] Nov. 13, 2026    
SSGT III      
Related Party Transaction [Line Items]      
Total investments in and advances to $ 24,191   0
SSGT III | BD III DST Mortgage Loans      
Related Party Transaction [Line Items]      
Debt $ 24,191   0
Effective Interest/Preferred Rate [3] 5.00%    
Maturity Date [3] Nov. 13, 2032    
SST VI      
Related Party Transaction [Line Items]      
Receivables $ 5,319   13,929
Total investments in and advances to 69,928   42,211
SST VI | SST VI Note      
Related Party Transaction [Line Items]      
Debt $ 25,000   23,000
Contractual Interest/Preferred Rate [4] 4.00%    
Effective Interest/Preferred Rate [4] 7.87%    
Maturity Date [4] Jun. 30, 2027    
SST VI | SST VI OP Units, SLP and Series C Units      
Related Party Transaction [Line Items]      
Equity $ 4,959   5,282
SST VI | Series D Cumulative Redeemable Preferred Unit      
Related Party Transaction [Line Items]      
Equity $ 34,650   $ 0
Effective Interest/Preferred Rate [4],[5] 6.00%    
[1] During the three months ended March 31, 2025, SSGT III repaid all amounts outstanding on the SSGT III Bridge Loan and the SSGT III Promissory Note.
[2] Reflects the current interest rate or maturity date information in effect as of December 31, 2025, as applicable.
[3] Reflects the current interest rate or maturity date information in effect as of December 31, 2025, as applicable.
[4] Reflects the current interest/preferred rate or maturity date information in effect as of December 31, 2025, as applicable.
[5] Distributions are payable at a rate of: (a) 6% per annum from the date of issuance until the second anniversary after the date of issuance; (b) 7% per annum commencing the day following the second anniversary after the date of issuance until the third anniversary after the date of issuance; (c) 8% per annum commencing the day following the third anniversary after the date of issuance until the fourth anniversary after the date of issuance; and (d) 9% per annum thereafter.