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Contingencies - Environmental Contingencies (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($)
Commitments And Contingencies Disclosure [Abstract]
Environmental liability insurance, maximum coverage per incident (up to)	$ 40,000
Environmental liability insurance, maximum coverage amount	$ 40,000

X

- Definition

Environmental liability insurance maximum coverage amount.

+ References

No definition available.

+ Details

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Namespace Prefix:	cbl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Environmental Liability Insurance, Maximum Coverage Per Incident

+ References

No definition available.

+ Details

Name:	cbl_EnvironmentalLiabilityInsuranceMaximumCoveragePerIncident
Namespace Prefix:	cbl_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

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