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Combined Guarantor Subsidiaries - Revenues - Disaggregation of Revenue (Details) - Guarantor Subsidiaries - USD ($) | 3 Months Ended | 12 Months Ended
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Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rental revenues |  |  |  |  |  |  |  |  |  | $ 277,452,000 | [1] | $ 311,804,000 | [1] | $ 343,527,000
Revenue |  | $ 73,803,000 | $ 69,328,000 | $ 68,868,000 | $ 72,991,000 | $ 81,241,000 | $ 78,655,000 | $ 78,591,000 | $ 80,438,000 | 284,990,000 | [2] | 318,925,000 | [2] | 344,057,000
Malls |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  |  | 274,772,000 |  | 308,193,000 |  | 333,247,000
All Other |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue | [3] |  |  |  |  |  |  |  |  | 10,218,000 |  | 10,732,000 |  | $ 10,810,000
Operating expense reimbursements |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from contracts with customers (ASC 606): | [4] |  |  |  |  |  |  |  |  | 4,045,000 |  | 3,914,000 |  |
Operating expense reimbursements | Malls |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from contracts with customers (ASC 606): |  |  |  |  |  |  |  |  |  | 4,039,000 |  | 3,880,000 |  |
Operating expense reimbursements | All Other |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from contracts with customers (ASC 606): |  |  |  |  |  |  |  |  |  | 6,000 |  | 34,000 |  |
Marketing revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from contracts with customers (ASC 606): | [5] |  |  |  |  |  |  |  |  | 2,760,000 |  | 2,673,000 |  |
Total Revenue |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from contracts with customers (ASC 606): |  |  |  |  |  |  |  |  |  | 6,805,000 |  | 6,587,000 |  |
Other revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other revenues |  |  |  |  |  |  |  |  |  | $ 733,000 |  | $ 534,000 |  |
[1] | Revenues from leases that commenced subsequent to December 31, 2018 are accounted for in accordance with ASC 842, Leases , whereas all leases existing prior to that date are accounted for in accordance with ASC 840, Leases . See Note 4 .
[2] | Sales taxes are excluded from revenues.
[3] | The All Other category includes associated centers and notes receivable.
[4] | Includes $ 4,039 in the Malls segment and $ 6 in the All Other segment in 2019 and includes $ 3,880 in the Malls segment and $ 34 in the All Other segment in 2018.
[5] | Marketing revenues solely relate to the Malls segment for all periods presented. See description below.

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