Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Accumulated Depreciation, Depletion and Amortization, Sale or Disposal of Property, Plant and Equipment	$ 542,161	$ 421,551
Finite-Lived Intangible Assets, Accumulated Amortization	177,348	149,896
sales inducements accumulated amortization	4,902	3,567
Below Market Lease, Accumulated Amortization	$ 31,511	23,655
Common Stock, par value per share	$ 0.01
Common stock, shares outstanding	49,900,555
Financing Receivable, Related Party, Allowance For Doubtful Accounts	$ 3,548	1,416
Real Estate Related Loans, Deferred Fee Income and loan loss allowance	$ 10,480	$ 1,460
Series A Preferred Stock [Member]
Series A Redeemable Preferred Stock, par value per share	$ 0.01	$ 0.01
Preferred stock, shares authorized	3,050,000	3,050,000
Preferred stock, shares issued	2,226,000	2,161,000
Shares outstanding, preferred stock	1,991,000	2,028,000
Series M Preferred Stock [Member]
Series A Redeemable Preferred Stock, par value per share	$ 0.01	$ 0.01
Preferred stock, shares authorized	500,000	500,000
Preferred stock, shares issued	106,000	106,000
Shares outstanding, preferred stock	91,000	103,000
Common Stock [Member]
Common Stock, par value per share	$ 0.01	$ 0.01
Common stock, shares authorized	400,067,000	400,067,000
Common Stock, Shares, Issued	49,901,000	46,443,000
Common stock, shares outstanding	49,901,000	46,443,000
Series A1 Preferred Stock
Series A Redeemable Preferred Stock, par value per share	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	103,000	5,000
Shares outstanding, preferred stock	103,000	5,000
Series M1 Preferred Stock
Series A Redeemable Preferred Stock, par value per share	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	13,000	0
Shares outstanding, preferred stock	13,000	0
Line of Credit [Member]
Deferred loan costs, accumulated amortization	$ 1,362	$ 849
Mortgages [Member]
Deferred loan costs, accumulated amortization	48,376	42,807
Notes Payable, Other Payables
Deferred loan costs, accumulated amortization	$ 0	$ 511