Summary of Relative Fair Values of Assets Acquired and Liabilities Assumed (Parenthetical) (Detail)
$ in Millions
Nov. 10, 2020
USD ($)
KeyBank SST IV CMBS Loan  
Business Acquisition [Line Items]  
Debt $ 40.5
Fair market value discount on debt 0.1
SST IV TCF Loan  
Business Acquisition [Line Items]  
Debt $ 40.8