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Real Estate and Lending Activities - 2020 Activity - Additional Information (Detail)
$ in Thousands, € in Millions, £ in Millions, SFr in Millions
9 Months Ended
Aug. 13, 2020
USD ($)
Aug. 07, 2020
GBP (£)
Aug. 05, 2020
EUR (€)
Jul. 08, 2020
USD ($)
Hospital
Apr. 29, 2020
RenewalOption
Jan. 08, 2020
GBP (£)
Hospital
Sep. 30, 2020
USD ($)
Hospital
Jun. 24, 2020
CHF (SFr)
May 13, 2020
USD ($)
Sep. 30, 2019
USD ($)
Business Acquisition [Line Items]                    
Term of lease extension, years             5 years      
Acquisition loan | $             $ 3,524,910     $ 3,703,092
Joint Venture Partner [Member]                    
Business Acquisition [Line Items]                    
Ownership interest                 49.00%  
Other Loans [Member] | Joint Venture Partner [Member]                    
Business Acquisition [Line Items]                    
Acquisition loan | $                 $ 205,000  
Swiss Healthcare Real Estate Company Infracore S A [Member]                    
Business Acquisition [Line Items]                    
Secured loan | SFr               SFr 45    
Utah [Member] | Steward [Member]                    
Business Acquisition [Line Items]                    
Number of facilities acquired       2            
Purchase price of acquisition | $       $ 200,000            
Utah [Member] | Steward [Member] | Davis and Jordan Valley Facilities [Member]                    
Business Acquisition [Line Items]                    
Net investment in lease | $       $ 950,000            
Acute Care Hospital [Member]                    
Business Acquisition [Line Items]                    
Number of facilities acquired             2      
Acute Care Hospital [Member] | United Kingdom [Member] | BMI [Member]                    
Business Acquisition [Line Items]                    
Number of facilities acquired           30        
Purchase price of acquisition | £           £ 1,500.0        
Number of leased properties           52        
Initial fixed term of lease           2050        
Existence of option to extend         true false        
Number of lease extension options | RenewalOption         2          
Term of lease extension, years         5 years          
Lease extension options, description             two five-year renewal options      
Acute Care Hospital [Member] | California [Member] | Prime Healthcare Services [Member]                    
Business Acquisition [Line Items]                    
Purchase price of acquisition | $ $ 300,000                  
Acute Care Hospital [Member] | Darlington, United Kingdom [Member]                    
Business Acquisition [Line Items]                    
Number of facilities acquired             1      
Purchase price of acquisition | £   £ 29.4                
Inpatient Rehabilitation Hospital [Member] | Dahlen, Germany [Member]                    
Business Acquisition [Line Items]                    
Number of facilities acquired             1      
Purchase price of acquisition | €     € 12.5