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Acquisitions - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2021
Jun. 30, 2020
Business Acquisition [Line Items]      
Mortgages assumed, shopping center acquisition   $ 17.9 $ 0.0
Revenues from the date of acquisition $ 0.5 0.5  
Cash [Member]      
Business Acquisition [Line Items]      
Consideration paid   31.5  
Mortgage Assumed [Member]      
Business Acquisition [Line Items]      
Mortgages assumed, shopping center acquisition   $ 17.9