Earnings Per Share - Calculation of Earnings Per Share (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Income from continuing operations	$ 35,976	$ 7,309
Non-controlling interests' share in continuing operations	(79)	(66)
Participating securities' share in earnings	(266)	(209)
Income from continuing operations, less participating securities' share in earnings	35,631	7,034
Income (loss) from discontinued operations		(2)
Net income, less participating securities' share in earnings	35,631	7,032
Basic weighted-average common shares	202,958	163,973
Dilutive potential common shares	657	576
Dilutive weighted-average common shares	203,615	164,549
MPT Operating Partnership, L.P. [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Income from continuing operations	35,976	7,309
Non-controlling interests' share in continuing operations	(79)	(66)
Participating securities' share in earnings	(266)	(209)
Income from continuing operations, less participating securities' share in earnings	35,631	7,034
Income (loss) from discontinued operations		(2)
Net income, less participating securities' share in earnings	$ 35,631	$ 7,032
Basic weighted-average common shares	202,958	163,973
Dilutive potential common shares	657	576
Dilutive weighted-average common shares	203,615	164,549

Income (loss) from continuing operations, less participating securities' share in earnings.

No definition available.

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- Definition

Net Income Less Participating Securities Share In Earnings

+ References

No definition available.

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- Definition

Undistributed earning allocated to participating securities.

+ References

No definition available.

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- Definition

Amount of income (loss) from continuing operations attributable to the noncontrolling interest. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 45

-Paragraph 19

-URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683

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-Publisher FASB

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-Section 45

-Paragraph 15

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- Definition

This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses and taxes from ongoing operations before extraordinary items, and noncontrolling interest.

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- Definition

Amount of income (loss) from a disposal group, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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- Definition

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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-Publisher FASB

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