Commitments and Contingencies (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jun. 28, 2019
Cash tender [Abstract]
Minimum aggregate value of Operating Partnership units to be tendered	$ 50,000
Fair Value of Written Option, Cash Tender Agreement	$ 0
Share Price	$ 31.09			$ 40.83
Approximate aggregate value of interests in the Operating Partnership that may be tendered	$ 752,100
Additional interest the Company would have owned in the Operating Partnership upon purchase of interests (in hundredths)	28.00%
Continuing offer [Abstract]
Common Stock, Conversion Basis	one TRG Unit is exchangeable for one share of common stock
Loss Contingencies [Line Items]
Gain (Loss) Related to Litigation Settlement	$ 10,095
Partial Reimbursement of Anchor Allowance	$ 20,000
Loss from Catastrophes			$ 7,800
Series B Preferred Stock [Member]
Continuing offer [Abstract]
Convertible Preferred Stock, Terms of Conversion	ratio of 14,000 shares of Series B Preferred Stock for one share of common stock
The Mall of San Juan [Member]
Loss Contingencies [Line Items]
Partial Reimbursement of Anchor Allowance, Future Installment Payment Amounts	$ 3,000
Gain (Loss) Related to Litigation Settlement	10,100
Partial Reimbursement of Anchor Allowance, Total Agreed Upon Amount	26,000
Partial Reimbursement of Anchor Allowance	20,000
Business Interruption Insurance Proceeds Received	8,574
Insurance Recoveries - Revenue Reduction	(1,202)
Insurance Recoveries - Expense Items	185	1,234	1,101
Insurance Recoveries - Capital Items	2,000	4,866	$ 902
Gain on Business Interruption Insurance Recovery	$ 1,418