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Summarized Financial Information of Equity Affiliates - Additional Information (Detail)
$ in Millions
1 Months Ended 9 Months Ended
Nov. 08, 2021
USD ($)
Sep. 30, 2021
Property
Grayson Properties | Subsequent Event    
Schedule Of Equity Method Investments [Line Items]    
Minority ownership interest held by a third-party 5.00%  
Purchase price | $ $ 3.1  
Ownership percentage upon completion of the minority ownership purchase 100.00%  
Limited Liability Companies | Medical Office Buildings    
Schedule Of Equity Method Investments [Line Items]    
Number of real estate investments | Property   5
Minimum    
Schedule Of Equity Method Investments [Line Items]    
Number of days for Non-Offering Member either to purchase or sell its entire ownership interest to or from Offering Member   60 days
Maximum    
Schedule Of Equity Method Investments [Line Items]    
Number of days for Non-Offering Member either to purchase or sell its entire ownership interest to or from Offering Member   90 days
4 Unconsolidated Limited Liability Companies / Limited Partner | Minimum    
Schedule Of Equity Method Investments [Line Items]    
Non-controlling equity interest, ownership percentage   33.00%
4 Unconsolidated Limited Liability Companies / Limited Partner | Maximum    
Schedule Of Equity Method Investments [Line Items]    
Non-controlling equity interest, ownership percentage   95.00%