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Common Stock/Partners' Capital - Additional Information (Detail) - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Aug. 02, 2021
Jan. 11, 2021
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Class Of Stock [Line Items]                  
Common stock, shares issued     588,964       588,964   541,419
Proceeds from sale of common shares / units, net of offering costs             $ 900,574 $ 169,787  
MPT Operating Partnership, L.P. [Member]                  
Class Of Stock [Line Items]                  
Number of units sold             45,600 8,600  
MPT Operating Partnership, L.P. [Member] | Medical Properties Trust, LLC. [Member]                  
Class Of Stock [Line Items]                  
Percentage of ownership of general partner             100.00%    
MPT Operating Partnership, L.P. [Member] | MPT TRS, Inc [Member]                  
Class Of Stock [Line Items]                  
Percentage of ownership of general partner             100.00%    
MPT Operating Partnership, L.P. [Member] | Operating Partnership [Member]                  
Class Of Stock [Line Items]                  
Percentage of ownership limited partner             100.00%    
At-the-Market Equity Offering Program [Member] | Subsequent Event                  
Class Of Stock [Line Items]                  
Proceeds from sale of common shares / units, net of offering costs $ 131,100                
Public Offering [Member]                  
Class Of Stock [Line Items]                  
Common stock, shares issued   36,800              
Proceeds from sale of common shares / units, net of offering costs   $ 711,000              
At-the-Market Equity Offering Program [Member]                  
Class Of Stock [Line Items]                  
Proceeds from sale of common shares / units, net of offering costs             $ 189,000 $ 170,000  
Common Units [Member]                  
Class Of Stock [Line Items]                  
Number of share sold     5,679 39,949 6,017 2,601      
Common Units [Member] | At-the-Market Equity Offering Program [Member] | Subsequent Event                  
Class Of Stock [Line Items]                  
Number of share sold 6,500                
Common Units [Member] | At-the-Market Equity Offering Program [Member]                  
Class Of Stock [Line Items]                  
Number of share sold             8,800 8,600