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Real Estate and Other Activities - 2022 Activity - Additional Information (Detail)
$ in Thousands, € in Millions, £ in Millions
9 Months Ended
Feb. 07, 2023
Facility
Jul. 29, 2022
USD ($)
Apr. 29, 2022
EUR (€)
Facility
Apr. 25, 2022
USD ($)
Facility
Apr. 18, 2022
Facility
Mar. 14, 2022
USD ($)
Facility
Mar. 11, 2022
USD ($)
Facility
Mar. 11, 2022
EUR (€)
Facility
Feb. 16, 2022
GBP (£)
Sep. 30, 2023
USD ($)
Sep. 30, 2022
USD ($)
Facility
Dec. 31, 2022
USD ($)
Business Acquisition [Line Items]                        
Gain (loss) on real estate dispositions                     $ 100,000  
Investments in unconsolidated real estate joint ventures                   $ 1,461,725   $ 1,497,903
Acquisition loan                   235,187 $ 972,243  
Deferred income tax liabilities and other liabilities, incurred             $ 26,000          
Syndicated Term Loan [Member]                        
Business Acquisition [Line Items]                        
Purchase price of acquisition | £                 £ 96.5      
Acquisition loan | £                 £ 100.0      
Loan term                 6 years      
Corporate Joint Venture [Member]                        
Business Acquisition [Line Items]                        
Investments in unconsolidated real estate joint ventures           $ 400,000            
Real Estate Partnership [Member]                        
Business Acquisition [Line Items]                        
Percentage of equity investment           50.00%            
General Acute Care Hospitals [Member]                        
Business Acquisition [Line Items]                        
Number of facilities acquired | Facility 8     2             6  
Purchase price of acquisition   $ 26,000   $ 80,000                
Lease extension expiration year 2041                      
General Acute Care Hospitals [Member] | Finland [Member]                        
Business Acquisition [Line Items]                        
Number of facilities acquired | Facility             4 4        
Purchase price of acquisition             $ 194,000 € 178        
General Acute Care Hospitals [Member] | Arizona [Member]                        
Business Acquisition [Line Items]                        
Number of facilities acquired | Facility         1              
General Acute Care Hospitals [Member] | Spain [Member]                        
Business Acquisition [Line Items]                        
Number of facilities acquired | Facility     3                  
Purchase price of acquisition | €     € 27                  
Massachusetts-based General Acute Care Hospitals [Member]                        
Business Acquisition [Line Items]                        
Number of facilities acquired | Facility           8            
Purchase price of acquisition           $ 1,700,000            
Gain (loss) on real estate dispositions           $ 600,000            
Nonrecourse secured debt percentage of asset value           55.00%            
Proceeds from expected secured debt                   $ 1,300,000    
Lease extension expiration year           2041            
Massachusetts-based General Acute Care Hospitals [Member] | Macquarie Asset Management [Member]                        
Business Acquisition [Line Items]                        
Percentage of equity investment           50.00%