Debt Instrument, Period of Extension Option

No definition available.

Name:	cbl_DebtInstrumentPeriodofExtensionOption
Namespace Prefix:	cbl_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Revenue From Contracts With Customers, Operating Agreements, Number Of Extension Options Available.

+ References

No definition available.

+ Details

Name:	cbl_RevenueFromContractsWithCustomersOperatingAgreementsNumberOfExtensionOptionsAvailable
Namespace Prefix:	cbl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Description of the frequency of periodic payments (monthly, quarterly, annual).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the payment terms of the debt instrument (for example, whether periodic payments include principal and frequency of payments) and discussion about any contingencies associated with the payment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(3))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentPaymentTerms
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the required periodic payments applied to interest.

+ References

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPaymentInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Weighted average interest rate of long-term debt outstanding calculated at point in time.

+ References

No definition available.

+ Details

Name:	us-gaap_LongtermDebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_GuaranteeObligationsByNatureAxis=cbl_ShoppesAtEaglePointLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_GuaranteeObligationsByNatureAxis=cbl_OakParkMallLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=cbl_ForbearanceAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_GuaranteeObligationsByNatureAxis=cbl_AmbassadorInfrastructureLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=cbl_FixedRateInterestMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=cbl_SeniorNotesDue2024Member
Namespace Prefix:
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Balance Type:
Period Type:

Subsequent Events - Narrative (Details) $ in Thousands		1 Months Ended	9 Months Ended
Subsequent Events - Narrative (Details) $ in Thousands	Oct. 15, 2020 USD ($)	Oct. 31, 2020	Sep. 30, 2020 USD ($) extension_option	Dec. 31, 2019
Subsequent Event [Line Items]
Weighted average interest rate (as a percent)			6.51%	5.02%
Shoppes at Eagle Point, LLC
Subsequent Event [Line Items]
Number of extension options available \| extension_option			1
Option extension term of debt instrument			1 year
Shoppes at Eagle Point, LLC \| Secured Debt
Subsequent Event [Line Items]
Debt instrument, maturity date			Oct. 31, 2020
Number of extension options available \| extension_option			1
Option extension term of debt instrument			1 year
Oak Park Mall LLC \| Secured Debt \| Forbearance Agreement
Subsequent Event [Line Items]
Debt instrument payment period			Pursuant to the terms of the forbearance agreement, all interest payments from June 2020 through November 2020 were deferred. The loan will be interest only through November 1, 2022; however, beginning on September 1, 2021 and continuing through November 1, 2022, the deferred interest is to be made in equal monthly installments in addition to the scheduled interest payments.
Ambassador Infrastructure, LLC \| Secured Debt
Subsequent Event [Line Items]
Debt instrument, maturity date			Oct. 31, 2020
Subsequent Event \| Shoppes at Eagle Point, LLC \| Secured Debt
Subsequent Event [Line Items]
Debt instrument, maturity date		Oct. 31, 2021
Subsequent Event \| Oak Park Mall LLC \| Secured Debt \| Forbearance Agreement
Subsequent Event [Line Items]
Frequency of interest payment		monthly payments of principal and interest
Subsequent Event \| Ambassador Infrastructure, LLC \| Secured Debt
Subsequent Event [Line Items]
Debt instrument, maturity date		Jan. 31, 2021
Fixed Rate Interest
Subsequent Event [Line Items]
Weighted average interest rate (as a percent)			5.31%	5.35%
Senior Unsecured Notes Due 2024
Subsequent Event [Line Items]
Interest payment \| $			$ 6,900
Senior Unsecured Notes Due 2024 \| Subsequent Event
Subsequent Event [Line Items]
Interest payment \| $	$ 6,900
Senior Unsecured Notes Due 2024 \| Fixed Rate Interest
Subsequent Event [Line Items]
Weighted average interest rate (as a percent)			4.60%	4.60%
Senior Unsecured Notes Due 2024 \| Fixed Rate Interest \| Subsequent Event
Subsequent Event [Line Items]
Weighted average interest rate (as a percent)	4.60%