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Earnings per Share and Earnings per Unit - Narrative (Details) - shares | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
CBL & Associates Limited Partnership |  |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |
Undistributed losses allocated to participating common units percent |  |  |  | 100.00% |
Common Units | CBL & Associates Limited Partnership |  |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |
Potentially dilutive securities excluded from the computation of EPS (shares) |  | 0 | 0 | 0 | 0
Antidilutive securities excluded from the computation of EPS (shares) |  | 0 | 0 | 0 | 0
Common Stock |  |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |
Potentially dilutive securities excluded from the computation of EPS (shares) |  | 0 | 0 | 0 | 0
Antidilutive securities excluded from the computation of EPS (shares) |  | 0 | 0 | 0 | 0
Operating Partnership |  |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |
Redeemable noncontrolling interest, units exercised for conversion (shares) | 1,193,978 |  |  |  |
Redeemable noncontrolling interest, shares issued upon exercise of common units (shares) | 622,278 |  |  |  |
Redeemable noncontrolling interest, shares issued upon exercise of contractual exchange rights (shares) | 571,700 |  |  |  |

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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=124432515&loc=d3e3550-109257 + Details
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