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Real Estate and Other Activities - Investments in Unconsolidated Operating Entities - Additional Information (Detail) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Jan. 08, 2021
Steward Health Care System LLC [Member]      
Business Acquisition [Line Items]      
Distribution on equity investment   $ 11.0  
Steward Health Care System LLC [Member] | Affiliates of Steward Health Care System LLC [Member]      
Business Acquisition [Line Items]      
Passive equity interest     9.90%
Aevis Victoria SA [Member]      
Business Acquisition [Line Items]      
Ownership interest in joint venture under the cost method 5.00%    
COVID-19 Pandemic [Member]      
Business Acquisition [Line Items]      
Favorable non-cash fair value adjustment on investment   $ 2.8  
Dividend income $ 4.0    
COVID-19 Pandemic [Member] | Other [Member]      
Business Acquisition [Line Items]      
Favorable non-cash fair value adjustment on investment $ 12.6