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Combined Guarantor Subsidiaries - Revenues - Disaggregation of Revenue (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers (ASC 606): |  | $ 5,224,000 | $ 5,540,000 |
Total revenues | [1] | 167,574,000 | 198,030,000 |
Malls |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenues | [1] | 153,351,000 | 183,864,000 |
All Other |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenues | [1],[2] | 14,223,000 | 14,166,000 |
Operating expense reimbursements |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers (ASC 606): |  | 2,389,000 | 2,143,000 |
Operating expense reimbursements | Malls |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers (ASC 606): |  | 2,321,000 | 2,192,000 |
Marketing revenues |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers (ASC 606): |  | 743,000 | 874,000 |
Other revenues |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenues |  | 1,177,000 | 1,510,000 |
Guarantor Subsidiaries |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Rental revenues |  | 63,831,000 | 71,272,000 |
Total revenues |  | 65,427,000 | 72,992,000 | $ 72,992,000
Guarantor Subsidiaries | Malls |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenues |  | 63,045,000 |  | 70,400,000
Guarantor Subsidiaries | All Other |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Total revenues |  | 2,382,000 |  | $ 2,592,000
Guarantor Subsidiaries | Operating expense reimbursements |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers (ASC 606): |  | 1,071,000 | 1,151,000 |
Guarantor Subsidiaries | Operating expense reimbursements | Malls |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers (ASC 606): |  | 1,046,000 |  |
Guarantor Subsidiaries | Operating expense reimbursements | All Other |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers (ASC 606): |  | 25,000 |  |
Guarantor Subsidiaries | Marketing revenues |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers (ASC 606): |  | 390,000 | 437,000 |
Guarantor Subsidiaries | Total Revenue |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Revenues from contracts with customers (ASC 606): |  | 1,461,000 | 1,588,000 |
Guarantor Subsidiaries | Other revenues |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Other revenues |  | $ 135,000 | $ 132,000 |
[1] | Management, development and leasing fees are included in the All Other category. See Note 3 for information on the Company's revenues disaggregated by revenue source for each of the above segments.
[2] | The All Other category includes associated centers, community centers, mortgage and other notes receivable, office buildings, self-storage facilities, corporate-level debt and the Management Company.

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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