Earnings Per Share/Unit - Calculation of Earnings Per Share (Detail) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net (loss) income		$ (42,433)	$ 33,030	$ 190,064	$ 631,947	$ (9,403)	$ 822,011
Non-controlling interests' share in net loss (income)		396		(467)		160	(733)
Participating securities’ share in earnings		(469)		(345)		(984)	(747)
Net (loss) income, less participating securities' share in earnings		$ (42,506)		$ 189,252		$ (10,227)	$ 820,531
Basic weighted-average common shares		598,344		598,827		598,323	598,751
Dilutive potential common shares	[1]			199			228
Diluted weighted-average common shares		598,344		599,026		598,323	598,979
MPT Operating Partnership, L.P. [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net (loss) income		$ (42,433)	$ 33,030	$ 190,064	$ 631,947	$ (9,403)	$ 822,011
Non-controlling interests' share in net loss (income)		396		(467)		160	(733)
Participating securities’ share in earnings		(469)		(345)		(984)	(747)
Net (loss) income, less participating securities' share in earnings		$ (42,506)		$ 189,252		$ (10,227)	$ 820,531
Basic weighted-average common shares		598,344		598,827		598,323	598,751
Dilutive potential common shares	[1]			199			228
Diluted weighted-average common shares		598,344		599,026		598,323	598,979

[1] Potential common shares/units are not included in the computation of diluted earnings per share when a loss exists as the effect would be an antidilutive per share amount.