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Real Estate and Loans Receivable - Summary of Loans (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Loans [Line Items]    
Loans, Balance $ 970,761us-gaap_LoansReceivableNet $ 549,746us-gaap_LoansReceivableNet
Mortgage loans [Member]    
Loans [Line Items]    
Loans, Balance 397,594us-gaap_LoansReceivableNet
/ us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesByTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember		 388,756us-gaap_LoansReceivableNet
/ us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesByTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
Loans, Weighted Average Interest Rate 10.50%us-gaap_MortgageLoansOnRealEstateInterestRate
/ us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesByTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember		 10.00%us-gaap_MortgageLoansOnRealEstateInterestRate
/ us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesByTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
Working capital and other loans [Member]    
Loans [Line Items]    
Loans, Balance 48,031us-gaap_LoansReceivableNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mpw_WorkingCapitalLoansMember		 51,335us-gaap_LoansReceivableNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mpw_WorkingCapitalLoansMember
Loans, Weighted Average Interest Rate 10.40%us-gaap_MortgageLoansOnRealEstateInterestRate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mpw_WorkingCapitalLoansMember		 10.80%us-gaap_MortgageLoansOnRealEstateInterestRate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mpw_WorkingCapitalLoansMember
Acquisition loans [Member]    
Loans [Line Items]    
Loans, Balance $ 525,136us-gaap_LoansReceivableNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mpw_AcquisitionLoanMember		 $ 109,655us-gaap_LoansReceivableNet
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mpw_AcquisitionLoanMember
Loans, Weighted Average Interest Rate 9.30%us-gaap_MortgageLoansOnRealEstateInterestRate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mpw_AcquisitionLoanMember		 14.70%us-gaap_MortgageLoansOnRealEstateInterestRate
/ us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis
= mpw_AcquisitionLoanMember