Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	10,000,000us-gaap_PreferredStockSharesAuthorized	10,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares outstanding	0us-gaap_PreferredStockSharesOutstanding	0us-gaap_PreferredStockSharesOutstanding
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	250,000,000us-gaap_CommonStockSharesAuthorized	250,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	172,743,000us-gaap_CommonStockSharesIssued	161,310,000us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	172,743,000us-gaap_CommonStockSharesOutstanding	161,310,000us-gaap_CommonStockSharesOutstanding
General Partner [Member] \| MPT Operating Partnership, L.P. [Member]
General partner, units issued	1,722,000	1,608,000
General partner, units outstanding	1,722,000	1,608,000
LTIP Units [Member] \| MPT Operating Partnership, L.P. [Member]
LTIP Units, shares issued	292,000	292,000
LTIP Units, shares outstanding	292,000	292,000
Common Units [Member] \| MPT Operating Partnership, L.P. [Member]
Limited Partners, units issued	171,021,000	159,702,000
Limited Partners, units outstanding	171,021,000	159,702,000

Face amount or stated value per share of common stock.

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