Quarterly Financial Data (Unaudited) - Unaudited Quarterly Financial Information (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information [Line Items]
Revenues	$ 82,106	$ 80,777	$ 76,560	$ 73,089	$ 67,679	$ 60,106	$ 57,124	$ 57,614	$ 312,532	$ 242,523	$ 198,125
Income (loss) from continuing operations	15,029	28,663	(203)	7,309	13,309	25,391	25,031	25,570	50,798	89,301	72,870
Income (loss) from discontinued operations				(2)	4,588	312	2,374	640	(2)	7,914	17,207
Net income	15,029	28,663	(203)	7,307	17,897	25,703	27,405	26,210	50,796	97,215	90,077
Net income attributable to MPT common stockholders	14,947	28,537	(203)	7,241	17,839	25,648	27,348	26,156	50,522	96,991	89,900
Net income attributable to MPT common stockholders per share - basic	$ 0.08	$ 0.16		$ 0.04	$ 0.11	$ 0.16	$ 0.18	$ 0.19	$ 0.29	$ 0.64	$ 0.67
Weighted average shares outstanding - basic	172,411	171,893	171,718	163,973	161,143	154,758	149,509	140,347	169,999	151,439	132,331
Net income attributable to MPT common stockholders per share - diluted	$ 0.08	$ 0.16		$ 0.04	$ 0.11	$ 0.16	$ 0.18	$ 0.18	$ 0.29	$ 0.63	$ 0.67
Weighted average shares outstanding - diluted	172,604	172,639	171,718	164,549	161,840	155,969	151,056	141,526	170,540	152,598	132,333
MPT Operating Partnership, L.P. [Member]
Quarterly Financial Information [Line Items]
Revenues	82,106	80,777	76,560	73,089	67,679	60,106	57,124	57,614	312,532	242,523	198,125
Income (loss) from continuing operations	15,029	28,663	(203)	7,309	13,309	25,391	25,031	25,570	50,798	89,301	72,870
Income (loss) from discontinued operations				(2)	4,588	312	2,374	640	(2)	7,914	17,207
Net income	15,029	28,663	(203)	7,307	17,897	25,703	27,405	26,210	50,796	97,215	90,077
Net income attributable to MPT common stockholders	$ 14,948	$ 28,537	$ (203)	$ 7,241	$ 17,839	$ 25,648	$ 27,348	$ 26,156	$ 50,522	$ 96,991	$ 89,900
Net income attributable to MPT common stockholders per share - basic	$ 0.08	$ 0.16		$ 0.04	$ 0.11	$ 0.16	$ 0.18	$ 0.19	$ 0.29	$ 0.64	$ 0.67
Weighted average shares outstanding - basic	172,411	171,893	171,718	163,973	161,143	154,758	149,509	140,347	169,999	151,439	132,331
Net income attributable to MPT common stockholders per share - diluted	$ 0.08	$ 0.16		$ 0.04	$ 0.11	$ 0.16	$ 0.18	$ 0.18	$ 0.29	$ 0.63	$ 0.67
Weighted average shares outstanding - diluted	172,604	172,639	171,718	164,549	161,840	155,969	151,056	141,526	170,540	152,598	132,333