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Revenues - Narrative (Details) | 6 Months Ended
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Jun. 30, 2019 extension_option
Revenue from Contract with Customer [Abstract] |
Period between increases in fixed rate of arrangements | 5 years
Number of extension options (one or more) | 1
Period of extension option (50 or more years) | 50 years
Lease commission recognized upon lease execution (as a percent) | 50.00%

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- Definition Revenue From Contract With Customer, Operating Agreements, Cumulative Term + References No definition available. + Details
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- Definition Revenue From Contracts With Customers, Operating Agreements, Number Of Extension Options Available. + References No definition available. + Details
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- Definition Revenue, Performance Obligation, Lease Commission Recognized Upon Lease Execution, Percentage + References No definition available. + Details
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Namespace Prefix: | cbl_
Data Type: | num:percentItemType
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Period Type: | duration

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- Definition Revenues From Contracts With Customers, Fixed Rate Agreements, Price Increase Period + References No definition available. + Details
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Data Type: | xbrli:durationItemType
Balance Type: | na
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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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