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Real Estate and Other Activities - 2022 Activity - Additional Information (Detail)
$ in Thousands, € in Millions, £ in Millions
3 Months Ended
Mar. 14, 2022
USD ($)
Facility
Mar. 11, 2022
EUR (€)
Facility
Feb. 16, 2022
GBP (£)
Mar. 31, 2022
USD ($)
Mar. 31, 2021
USD ($)
Mar. 11, 2022
USD ($)
Dec. 31, 2021
USD ($)
Business Acquisition [Line Items]              
Percentage of equity investment 50.00%            
Gain (loss) on real estate dispositions       $ 15,000 $ 1,000    
Investments in unconsolidated real estate joint ventures       1,534,514     $ 1,152,927
Deferred income tax liabilities and other liabilities, incurred           $ 25,400  
Syndicated Term Loan [Member]              
Business Acquisition [Line Items]              
Purchase price of acquisition | £     £ 96.5        
Acquisition loan | £     £ 100.0        
Loan term     6 years        
Percentage of discount on investment     3.50%        
Joint Venture [Member]              
Business Acquisition [Line Items]              
Investments in unconsolidated real estate joint ventures $ 400,000            
General Acute Care Hospitals [Member] | Finland [Member]              
Business Acquisition [Line Items]              
Number of facilities acquired | Facility   4          
Purchase price of acquisition | €   € 178          
Massachusetts-based General Acute Care Hospitals [Member]              
Business Acquisition [Line Items]              
Percentage of equity investment 50.00%            
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