Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Real estate assets
Land, buildings and improvements, intangible lease assets, and other	$ 7,310,604	$ 5,268,459
Mortgage loans	1,268,563	1,213,322
Net investment in direct financing leases	688,891	684,053
Investment in sale leaseback transactions	1,390,619
Gross investment in real estate assets	10,658,677	7,165,834
Accumulated depreciation and amortization	(571,589)	(464,984)
Net investment in real estate assets	10,087,088	6,700,850
Cash and cash equivalents	461,622	820,868
Interest and rent receivables	25,653	25,855
Straight-line rent receivables	299,993	220,848
Equity investments	777,102	520,058
Other loans	521,398	373,198
Other assets	279,297	181,966
Total Assets	12,452,153	8,843,643
Liabilities
Debt, net	6,096,232	4,037,389
Accounts payable and accrued expenses	249,642	204,325
Deferred revenue	16,377	13,467
Obligations to tenants and other lease liabilities	103,084	27,524
Total Liabilities	6,465,335	4,282,705
Equity / Capital
Preferred stock, $0.001 par value. Authorized 10,000 shares; no shares outstanding
Common stock, $0.001 par value. Authorized 500,000 shares; issued and outstanding — 459,778 shares at September 30, 2019 and 370,637 shares at December 31, 2018	460	371
Limited Partners:
Additional paid-in capital	5,972,341	4,442,948
Retained earnings	91,535	162,768
Accumulated other comprehensive loss	(90,019)	(58,202)
Treasury shares, at cost	(777)	(777)
Total Medical Properties Trust, Inc. Stockholders' Equity (MPT Operating Partnership, L.P. capital)	5,973,540	4,547,108
Non-controlling interests	13,278	13,830
Total Equity / Capital	5,986,818	4,560,938
Total Liabilities and Equity / Capital	12,452,153	8,843,643
MPT Operating Partnership, L.P. [Member]
Real estate assets
Land, buildings and improvements, intangible lease assets, and other	7,310,604	5,268,459
Mortgage loans	1,268,563	1,213,322
Net investment in direct financing leases	688,891	684,053
Investment in sale leaseback transactions	1,390,619
Gross investment in real estate assets	10,658,677	7,165,834
Accumulated depreciation and amortization	(571,589)	(464,984)
Net investment in real estate assets	10,087,088	6,700,850
Cash and cash equivalents	461,622	820,868
Interest and rent receivables	25,653	25,855
Straight-line rent receivables	299,993	220,848
Equity investments	777,102	520,058
Other loans	521,398	373,198
Other assets	279,297	181,966
Total Assets	12,452,153	8,843,643
Liabilities
Debt, net	6,096,232	4,037,389
Accounts payable and accrued expenses	129,289	108,574
Deferred revenue	16,377	13,467
Obligations to tenants and other lease liabilities	103,084	27,524
Payable due to Medical Properties Trust, Inc.	119,963	95,361
Total Liabilities	6,464,945	4,282,315
Limited Partners:
Accumulated other comprehensive loss	(90,019)	(58,202)
Total Medical Properties Trust, Inc. Stockholders' Equity (MPT Operating Partnership, L.P. capital)	5,973,930	4,547,498
Non-controlling interests	13,278	13,830
Total Equity / Capital	5,987,208	4,561,328
Total Liabilities and Equity / Capital	12,452,153	8,843,643
General Partner [Member] | MPT Operating Partnership, L.P. [Member]
Equity / Capital
General Partner — issued and outstanding — 3,944 units at September 30,2019 and 3,706 units at December 31, 2018	60,666	46,084
Limited Partners:
Total Equity / Capital	60,666	46,084
Common Units [Member] | MPT Operating Partnership, L.P. [Member]
Limited Partners:
Limited Partners Capital	$ 6,003,283	$ 4,559,616