Income Taxes - Schedule of Per Share Distributions to Stockholders (Detail) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Common share distribution	$ 0.840000	$ 0.800000	$ 0.800000
Ordinary income	$ 0.520692mpw_OrdinaryIncomePerShare	$ 0.599384mpw_OrdinaryIncomePerShare	$ 0.601216mpw_OrdinaryIncomePerShare
Capital gains	$ 0.000276mpw_CapitalGainsPerShare	$ 0.046380mpw_CapitalGainsPerShare	$ 0.117584mpw_CapitalGainsPerShare
Unrecaptured Sec. 1250 gain	$ 0.000276	$ 0.026512	$ 0.086976
Return of capital	$ 0.319032mpw_ReturnOfCapitalPerShare	$ 0.154236mpw_ReturnOfCapitalPerShare	$ 0.081200mpw_ReturnOfCapitalPerShare
Allocable to next year	$ 0mpw_DistributionAllocableToNextYear	$ 0mpw_DistributionAllocableToNextYear	$ 0mpw_DistributionAllocableToNextYear