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Summarized Financial Information of Equity Affiliates - Additional Information (Detail) - Property
3 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Grayson Properties Member    
Schedule Of Equity Method Investments [Line Items]    
Minority ownership interest held by a third-party   5.00%
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 4  
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%