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Real Estate and Lending Activities - 2014 Activity - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 0 Months Ended
Mar. 31, 2015
Mar. 31, 2014
2014 [Member] | Acute Care Hospital [Member]    
Significant Acquisitions and Disposals [Line Items]    
Acquisition costs   $ 115.0us-gaap_AcquisitionCosts
/ us-gaap_MajorPropertyClassAxis
= mpw_AcuteCareHospitalMember
/ us-gaap_RealEstatePropertiesAxis
= mpw_TwoThousandFourteenMember
Term of lease, years 15 years  
Term of lease extension, years 3 years  
2014 [Member] | Acute Care Hospital [Member] | Fair value market [Member]    
Significant Acquisitions and Disposals [Line Items]    
Term of lease extension, years 12 years  
Development Activities [Member] | First Choice [Member]    
Significant Acquisitions and Disposals [Line Items]    
Number of facilities leased 2mpw_NumberOfFacilitiesLeased
/ us-gaap_MajorCustomersAxis
= mpw_FirstChoiceMember
/ us-gaap_RealEstatePropertiesAxis
= mpw_DevelopmentActivitiesMember		  
Development Activities [Member] | First Choice [Member] | Asset under Construction [Member]    
Significant Acquisitions and Disposals [Line Items]    
Number of facilities leased 6mpw_NumberOfFacilitiesLeased
/ us-gaap_MajorCustomersAxis
= mpw_FirstChoiceMember
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_AssetUnderConstructionMember
/ us-gaap_RealEstatePropertiesAxis
= mpw_DevelopmentActivitiesMember