Consolidated Balance Sheets - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Assets
Real Estate Investment Property, Net	$ 5,067,657,000	$ 5,197,308,000
Real Estate Owned, Accumulated Depreciation	1,072,201,000	989,254,000
Land held for development	25,846,000	28,080,000
Property under development	44,103,000	36,756,000
Operating Lease, Right-of-Use Asset	185,459,000	211,187,000
Financing Receivable, after Allowance for Credit Loss, Current	362,011,000	357,391,000
Investment in joint ventures	29,571,000	34,317,000
Cash and cash equivalents	985,372,000	528,763,000
Restricted cash	2,424,000	2,677,000
Accounts receivable, net	129,714,000	86,858,000
Other assets	75,053,000	94,174,000
Total assets	6,907,210,000	6,577,511,000
Liabilities:
Accounts payable and accrued liabilities	95,429,000	122,939,000
Operating Lease, Liability	225,379,000	235,650,000
Dividends Payable, Current	29,000	29,424,000
Preferred dividends payable	6,034,000	6,034,000
Unearned rents and interest	75,415,000	74,829,000
Debt	3,854,855,000	3,102,830,000
Total liabilities	$ 4,257,141,000	$ 3,571,706,000
Common Stock, Shares, Issued	81,908,330	81,588,489
Equity:
Common Stock, Value, Issued	$ 819,000	$ 816,000
Preferred shares, $.01 par value; 25,000,000 shares authorized:
Additional paid-in-capital	$ 3,852,762,000	$ 3,834,858,000
Treasury Stock, Shares	7,294,902	3,125,569
Treasury Stock, Value	$ (260,594,000)	$ (147,435,000)
Accumulated other comprehensive income	(2,106,000)	7,275,000
Distributions in excess of net income	940,960,000	689,857,000
Total equity	2,650,069,000	3,005,805,000
Total liabilities and equity	$ 6,907,210,000	$ 6,577,511,000
Common Shares, par value	$ 0.01	$ 0.01
Common Shares, shares authorized	100,000,000	100,000,000
Preferred Shares, par value	$ 0.01	$ 0.01
Preferred Shares, shares authorized	25,000,000	25,000,000
Series C Preferred Shares [Member]
Preferred shares, $.01 par value; 25,000,000 shares authorized:
Preferred shares	$ 54,000	$ 54,000
Preferred Shares, shares issued	5,394,050	5,394,050
Preferred Shares, liquidation preference	$ 134,851,250	$ 134,851,250
Series E Preferred Shares [Member]
Preferred shares, $.01 par value; 25,000,000 shares authorized:
Preferred shares	$ 34,000	$ 34,000
Preferred Shares, shares issued	3,447,381	3,447,381
Preferred Shares, liquidation preference	$ 86,184,525	$ 86,184,525
Series G Preferred Stock [Member]
Preferred shares, $.01 par value; 25,000,000 shares authorized:
Preferred shares	$ 60,000	$ 60,000
Preferred Shares, shares issued	6,000,000	6,000,000
Preferred Shares, liquidation preference	$ 150,000,000	$ 150,000,000