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Summary of Relative Fair Values of Assets Acquired and Liabilities Assumed (Parenthetical) (Detail)
$ in Millions
Jun. 01, 2022
USD ($)
SSGT II Merger Agreement  
Business Acquisition [Line Items]  
Intangible assets acquired $ 8.0
KeyBank SST IV CMBS Loan  
Business Acquisition [Line Items]  
Fair market value discount on debt $ 16.1