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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Estimated Uncollectable Accounts (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Accounts Notes And Loans Receivable [Line Items] |  |  |
Change in estimate of uncollectable rental revenues | $ 3,463,000 | $ 4,817,000 | $ 3,782,000
CBL Associates Properties Inc |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Change in estimate of uncollectable rental revenues |  | $ 4,817,000 | $ 3,782,000
CBL Associates Properties Inc | ASC 842 |  |  |
Accounts Notes And Loans Receivable [Line Items] |  |  |
Uncollectible accounts, writeoff | $ 3,463,000 |  |

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- Definition Amount of direct write-downs of accounts receivable charged against the allowance. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 + Details
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