Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Real estate assets
Land, buildings and improvements, intangible lease assets, and other	$ 13,244,403	$ 12,078,927
Investment in financing leases	2,042,585	2,010,922
Real estate held for sale	1,096,475
Mortgage loans	200,285	248,080
Gross investment in real estate assets	16,583,748	14,337,929
Accumulated depreciation and amortization	(936,289)	(833,529)
Net investment in real estate assets	15,647,459	13,504,400
Cash and cash equivalents	349,652	549,884
Interest and rent receivables	64,622	46,208
Straight-line rent receivables	661,429	490,462
Equity investments	1,170,171	1,123,623
Other loans	1,502,677	858,368
Other assets	315,977	256,069
Total Assets	19,711,987	16,829,014
Liabilities
Debt, net	10,581,023	8,865,458
Accounts payable and accrued expenses	595,003	438,750
Deferred revenue	19,739	36,177
Obligations to tenants and other lease liabilities	157,488	144,772
Total Liabilities	11,353,253	9,485,157
Equity / Capital
Preferred stock, $0.001 par value. Authorized 10,000 shares; no shares outstanding
Common stock, $0.001 par value. Authorized 750,000 shares; issued and outstanding — 596,145 shares at September 30, 2021 and 541,419 shares at December 31, 2020	596	541
Additional paid-in capital	8,541,092	7,461,503
Distributions in excess of net income	(117,733)	(71,411)
Accumulated other comprehensive loss	(69,843)	(51,324)
Treasury shares, at cost	(777)	(777)
Total Medical Properties Trust, Inc. Stockholders' Equity (MPT Operating Partnership, L.P. capital)	8,353,335	7,338,532
Non-controlling interests	5,399	5,325
Total Equity / Capital	8,358,734	7,343,857
Total Liabilities and Equity / Capital	19,711,987	16,829,014
MPT Operating Partnership, L.P. [Member]
Real estate assets
Land, buildings and improvements, intangible lease assets, and other	13,244,403	12,078,927
Investment in financing leases	2,042,585	2,010,922
Real estate held for sale	1,096,475
Mortgage loans	200,285	248,080
Gross investment in real estate assets	16,583,748	14,337,929
Accumulated depreciation and amortization	(936,289)	(833,529)
Net investment in real estate assets	15,647,459	13,504,400
Cash and cash equivalents	349,652	549,884
Interest and rent receivables	64,622	46,208
Straight-line rent receivables	661,429	490,462
Equity investments	1,170,171	1,123,623
Other loans	1,502,677	858,368
Other assets	315,977	256,069
Total Assets	19,711,987	16,829,014
Liabilities
Debt, net	10,581,023	8,865,458
Accounts payable and accrued expenses	427,382	290,757
Deferred revenue	19,739	36,177
Obligations to tenants and other lease liabilities	157,488	144,772
Payable due to Medical Properties Trust, Inc.	167,231	147,603
Total Liabilities	11,352,863	9,484,767
Equity / Capital
Accumulated other comprehensive loss	(69,843)	(51,324)
Total Medical Properties Trust, Inc. Stockholders' Equity (MPT Operating Partnership, L.P. capital)	8,353,725	7,338,922
Non-controlling interests	5,399	5,325
Total Equity / Capital	8,359,124	7,344,247
Total Liabilities and Equity / Capital	19,711,987	16,829,014
General Partner [Member] | MPT Operating Partnership, L.P. [Member]
Equity / Capital
General Partner — issued and outstanding — 5,962 units at September 30, 2021 and 5,414 units at December 31, 2020	84,312	73,977
Total Equity / Capital	84,312	73,977
Common Units | MPT Operating Partnership, L.P. [Member]
Equity / Capital
Limited Partners — issued and outstanding — 590,183 units at September 30, 2021 and 536,005 units at December 31, 2020	$ 8,339,256	$ 7,316,269