Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2015	Nov. 06, 2015
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Trading Symbol	MPW
Entity Registrant Name	MEDICAL PROPERTIES TRUST INC.
Entity Central Index Key	0001287865
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		237,837,152
MPT Operating Partnership, L.P. [Member]
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Entity Registrant Name	MPT OPERATING PARTNERSHIP, L.P.
Entity Central Index Key	0001524607
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer