Earnings Per Share/Unit - Calculation of Earnings Per Share (Detail) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income	$ 116,895	$ (42,433)	$ 33,030	$ 222,020	$ 190,064	$ 631,947	$ 107,492	$ 1,044,031
Non-controlling interests' share in net (income) loss	(185)			(227)			(25)	(960)
Participating securities’ share in earnings	(311)			(288)			(1,295)	(1,035)
Net income, less participating securities' share in earnings	$ 116,399			$ 221,505			$ 106,172	$ 1,042,036
Basic weighted-average common shares	598,444			598,980			598,363	598,828
Dilutive potential common shares	109			359			43	271
Diluted weighted-average common shares	598,553			599,339			598,406	599,099
MPT Operating Partnership, L.P. [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income	$ 116,895	$ (42,433)	$ 33,030	$ 222,020	$ 190,064	$ 631,947	$ 107,492	$ 1,044,031
Non-controlling interests' share in net (income) loss	(185)			(227)			(25)	(960)
Participating securities’ share in earnings	(311)			(288)			(1,295)	(1,035)
Net income, less participating securities' share in earnings	$ 116,399			$ 221,505			$ 106,172	$ 1,042,036
Basic weighted-average common shares	598,444			598,980			598,363	598,828
Dilutive potential common shares	109			359			43	271
Diluted weighted-average common shares	598,553			599,339			598,406	599,099