Mortgage and Other Indebtedness, Net- Scheduled Principal Payments (Details) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2021 USD ($) loan	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
2021	$ 97,868
2022	408,410
2023	1,519,979
2024	343,409
2025	37,624
2026	763,533
Total	3,170,823
Mortgage and other indebtedness, net	987,592	$ 1,184,831
Liabilities subject to compromise	$ 2,529,138
Weighted-average remaining term to maturity	2 years 7 months 6 days	3 years
Greenbrier Mall
Debt Instrument [Line Items]
Mortgage and other indebtedness, net	$ 61,647
Debt instrument, maturity date	Dec. 31, 2019
Parkdale Mall & Crossing
Debt Instrument [Line Items]
Mortgage and other indebtedness, net	$ 71,278
Debt instrument, maturity date	Mar. 31, 2021
EastGate Mall
Debt Instrument [Line Items]
Mortgage and other indebtedness, net	$ 30,281
Debt instrument, maturity date	Apr. 30, 2021
Hamilton Crossing
Debt Instrument [Line Items]
Mortgage and other indebtedness, net	$ 8,039
Debt instrument, maturity date	Apr. 30, 2021
Fayette Mall
Debt Instrument [Line Items]
Mortgage and other indebtedness, net	$ 138,187
Debt instrument, maturity date	May 31, 2021
The Outlet Shoppes at Laredo
Debt Instrument [Line Items]
Mortgage and other indebtedness, net	$ 39,462
Debt instrument, maturity date	May 31, 2021
Alamance Crossing
Debt Instrument [Line Items]
Debt instrument, maturity date	Jul. 31, 2021
Mortgages
Debt Instrument [Line Items]
Mortgage and other indebtedness, net	$ 3,519,717
Operating Property Loan
Debt Instrument [Line Items]
2021	$ 70,507
Number of operating property loans (loan) \| loan	2
Operating Property Loan \| Mortgages
Debt Instrument [Line Items]
Mortgage and other indebtedness, net	$ 348,894

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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.

+ References

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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