CONSOLIDATED BALANCE SHEETS - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Net Real Estate Investments
Land	$ 273,043,000	$ 268,244,000
Buildings and improvements	1,807,386,000	1,752,738,000
Furniture, fixtures and equipment	73,797,000	67,904,000
Total Gross Real Estate Investments	2,154,226,000	2,088,886,000
Accumulated depreciation	(177,124,000)	(141,566,000)
Total Net Real Estate Investments	1,977,102,000	1,947,320,000
Cash and cash equivalents	91,836,000	31,683,000
Restricted cash	34,744,000	19,085,000
Notes and accrued interest receivable	202,649,000	193,781,000
Due from affiliates	314,000	2,969,000
Accounts receivable, prepaids and other assets	26,954,000	16,317,000
Preferred equity investments and investments in unconsolidated real estate joint ventures	108,098,000	126,444,000
In-place lease intangible assets, net	522,000	3,098,000
Total Assets	2,442,219,000	2,340,697,000
LIABILITIES, REDEEMABLE PREFERRED STOCK AND EQUITY
Mortgages payable	1,427,542,000	1,425,257,000
Revolving credit facilities		18,000,000
Mandatorily redeemable preferred stock	34,833,000
Accounts payable	1,596,000	1,488,000
Other accrued liabilities	36,664,000	27,499,000
Due to affiliates	602,000	790,000
Distributions payable	14,964,000	13,541,000
Total Liabilities	1,516,201,000	1,486,575,000
Stockholders' Equity
Additional paid-in-capital	323,064,000	311,683,000
Distributions in excess of cumulative earnings	(283,537,000)	(253,132,000)
Total Stockholders' Equity	106,641,000	127,491,000
Noncontrolling Interests
Operating Partnership units	13,531,000	19,331,000
Partially owned properties	26,456,000	28,839,000
Total Noncontrolling Interests	39,987,000	48,170,000
Total Equity	146,628,000	175,661,000
TOTAL LIABILITIES, REDEEMABLE PREFERRED STOCK AND EQUITY	2,442,219,000	2,340,697,000
Preferred Stock [Member]
Stockholders' Equity
Preferred Stock Value	0	0
Class A Common Stock [Member]
Stockholders' Equity
Common Stock Value	246,000	234,000
Noncontrolling Interests
Total Equity	246,000	234,000
Class C Common Stock [Member]
Stockholders' Equity
Common Stock Value	1,000	1,000
Noncontrolling Interests
Total Equity	1,000	1,000
Cumulative Redeemable Preferred Stock | Series A [Member]
LIABILITIES, REDEEMABLE PREFERRED STOCK AND EQUITY
Redeemable Preferred Stock	102,656,000	140,355,000
Cumulative Redeemable Preferred Stock | Series C [Member]
LIABILITIES, REDEEMABLE PREFERRED STOCK AND EQUITY
Redeemable Preferred Stock	56,373,000	56,797,000
Cumulative Redeemable Preferred Stock | Series D [Member]
Stockholders' Equity
Preferred Stock Value	66,867,000	68,705,000
Redeemable Preferred Stock [Member] | Series B [Member]
LIABILITIES, REDEEMABLE PREFERRED STOCK AND EQUITY
Redeemable Preferred Stock	469,538,000	480,921,000
Redeemable Preferred Stock [Member] | Series T
LIABILITIES, REDEEMABLE PREFERRED STOCK AND EQUITY
Redeemable Preferred Stock	$ 150,823,000	$ 388,000