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Real Estate and Lending Activities - Leasing Operations - Additional Information (Detail)
 3 Months Ended
Mar. 31, 2015
Leases
Ernest Health, Inc [Member]  
Significant Acquisitions and Disposals [Line Items]  
Number of direct financing leases 15mpw_NumberOfDirectFinancingLeases
/ us-gaap_MajorCustomersAxis
= mpw_ErnestHealthIncMember
Prime Facilities [Member]  
Significant Acquisitions and Disposals [Line Items]  
Number of direct financing leases 5mpw_NumberOfDirectFinancingLeases
/ us-gaap_MajorCustomersAxis
= mpw_PrimeFacilitiesMember