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Real Estate Activities - Development Activities - Additional Information (Detail)
$ in Millions
12 Months Ended
Oct. 25, 2019
USD ($)
Dec. 31, 2019
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Facility
Ernest [Member] | Development Activities [Member]        
Business Acquisition [Line Items]        
Estimated total development cost     $ 25.5  
Behavioral Hospital [Member] | Houston, Texas [Member]        
Business Acquisition [Line Items]        
Estimated total development cost $ 27.5      
Acute Care Facilities [Member] | Adeptus Health [Member] | Development Activities [Member]        
Business Acquisition [Line Items]        
Number of facilities constructed | Facility       4
Acquisition costs       $ 68.0
Acute Care Facilities [Member] | Spain [Member] | IMED [Member] | Development Activities [Member]        
Business Acquisition [Line Items]        
Lessor direct financing lease description   quarterly fixed rent payments that started on October 1, 2017 with annual increases of 1% beginning April 1, 2020.    
Lease rent increase percentage       1.00%
Ownership interests acquired       50.00%
Term of lease, years       30 years