Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Mortgage and Other Indebtedness, Net (Summary of Repaid Loans) (Details) - USD ($) $ in Thousands	1 Months Ended					3 Months Ended		9 Months Ended
	Sep. 30, 2017	Apr. 30, 2017	Mar. 31, 2017	Feb. 28, 2017	Jan. 31, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Debt Instrument [Line Items]
Principal Balance Repaid								$ 427,247
Loss on extinguishment of debt						$ (6,452)	$ 6	$ (30,927)	$ 0
The Plaza at Fayette
Debt Instrument [Line Items]
Interest Rate at Repayment Date					5.67%
Principal Balance Repaid					$ 37,146
The Shoppes at St. Clair Square
Debt Instrument [Line Items]
Interest Rate at Repayment Date					5.67%
Principal Balance Repaid					$ 18,827
Hamilton Corner
Debt Instrument [Line Items]
Interest Rate at Repayment Date				5.67%
Principal Balance Repaid				$ 14,227
Layton Hills Mall
Debt Instrument [Line Items]
Interest Rate at Repayment Date			5.66%
Principal Balance Repaid			$ 89,526
Outlet Shoppes at Oklahoma City
Debt Instrument [Line Items]
Interest Rate at Repayment Date		5.73%
Principal Balance Repaid		$ 53,386
Loss on extinguishment of debt		$ 8,500
Outlet Shoppes at Oklahoma City - Phase II
Debt Instrument [Line Items]
Interest Rate at Repayment Date		3.53%
Principal Balance Repaid		$ 5,545
Outlet Shoppes at Oklahoma City - Phase III
Debt Instrument [Line Items]
Interest Rate at Repayment Date		3.53%
Principal Balance Repaid		$ 2,704
Hanes Mall
Debt Instrument [Line Items]
Interest Rate at Repayment Date	6.99%					6.99%		6.99%
Principal Balance Repaid	$ 144,325
Loss on extinguishment of debt	$ 371
The Outlet Shoppes at El Paso
Debt Instrument [Line Items]
Interest Rate at Repayment Date	7.06%					7.06%		7.06%
Principal Balance Repaid	$ 61,561