Mortgage and Other Indebtedness, Net - Principal Payments (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Schedule of principal repayments [Abstract]
2018	$ 411,284
2019	309,346
2020	661,816
2021	499,321
2022	432,546
Thereafter	1,706,132
Mortgage and other indebtedness	4,020,445
Unamortized discounts	(11,304)
Unamortized deferred financing costs	(15,476)	$ (18,938)
Total mortgage and other indebtedness, net	4,115,808	$ 4,230,845
Acadiana Mall \| Mortgages
Schedule of principal repayments [Abstract]
Total mortgage and other indebtedness, net	$ 122,143

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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