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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Earnings Per Share (Details) - shares | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Common Stock |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Potentially dilutive securities excluded from the computation of EPS (shares) | 0 |  |
Antidilutive securities excluded from the computation of EPS (shares) | 0 |  |
CBL & Associates Limited Partnership |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Undistributed losses allocated to participating common units percent | 100.00% |  |
CBL & Associates Limited Partnership | Common Units |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Potentially dilutive securities excluded from the computation of EPS (shares) | 0 | 0 |
Antidilutive securities excluded from the computation of EPS (shares) | 0 | 0 |
Performance Shares | CBL Associates Properties Inc |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Contingently issuable common shares/ units (shares) |  |  | 102,820

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- Definition Undistributed loss allocated to participating common units percent. + References No definition available. + Details
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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Shares issuable for little or no cash consideration upon the satisfaction of certain conditions (contingently issuable shares) are considered outstanding common shares and included in the computation of basic Earnings Per Share as of the date that all necessary conditions have been satisfied (in essence, when issuance of the shares is no longer contingent). Outstanding common shares that are contingently returnable (that is, subject to recall) are treated in the same manner as contingently issuable shares. Contingently issuable shares include shares that (a) will be issued in the future upon the satisfaction of specified conditions, (b) have been placed in escrow and all or part must be returned if specified conditions are not met, or (c) have been issued but the holder must return all or part if specified conditions are not met. The number of contingently issuable shares is determined by relating the portion of time within a reporting period that these shares have been outstanding to the total time in that period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=121326447&loc=d3e2646-109256 + Details
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