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Share-Based Compensation - Summary (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 1 Months Ended | 3 Months Ended
--- | --- | --- | ---
Feb. 17, 2023 | Feb. 28, 2023 | Mar. 31, 2023 | Mar. 31, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |
Share-based compensation cost |  |  |  |  |  | $ 2,743
Weighted-Average Grant Date Fair Value |  |  |  |  |  |
Weighted average grant-date fair value, granted |  |  |  |  | $ 6,120 |
Restricted Stock Awards |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |
Share-based compensation cost |  |  |  |  | $ 1,843 | 1,622
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |  |  |
Nonvested, beginning of period (shares) |  |  |  |  | 662,875 |
Granted (shares) |  |  |  |  | 355,278 |
Vested (shares) |  |  |  |  | (265,341) |
Forfeited (shares) |  |  |  |  | (5,279) |
Nonvested, end of period (shares) |  |  |  |  | 747,533 |
Weighted-Average Grant Date Fair Value |  |  |  |  |  |
Weighted average grant-date fair value, nonvested, beginning of period (USD per share) |  |  |  |  | $ 27.42 |
Weighted average grant-date fair value, granted (USD per share) |  |  |  |  | 26.21 |
Weighted average grant-date fair value, vested (USD per share) |  |  |  |  | 26.25 |
Weighted average grant-date fair value, forfeited (USD per share) |  |  |  |  | 24.86 |
Weighted average grant-date fair value, nonvested, ending of period (USD per share) |  |  |  |  | $ 27.28 |
Unrecognized compensation cost related to nonvested stock awards |  |  |  |  | $ 18,507 |
Compensation cost to be recognized over a weighted-average period |  |  |  |  | 2 years 8 months 12 days |
Weighted average grant-date fair value, granted |  |  |  |  | $ 9,313 |
Total fair value of shares vested |  |  |  |  | $ 6,755 |
RSU component award vesting performance period |  |  |  | 3 years |  |
Granted (shares) |  |  |  |  | 355,278 |
weighted-average grant date fair value |  |  |  |  | $ 27.28 |
Restricted Stock Awards | Minimum |  |  |  |  |  |
Weighted-Average Grant Date Fair Value |  |  |  |  |  |
Component percentage in long-term incentive program |  |  |  | 40.00% |  |
Restricted Stock Awards | Maximum |  |  |  |  |  |
Weighted-Average Grant Date Fair Value |  |  |  |  |  |
Component percentage in long-term incentive program |  |  |  | 45.00% |  |
Performance Stock Awards |  |  |  |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |  |  |  |
Share-based compensation cost |  |  |  |  | $ 1,409 | $ 1,121
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |  |  |
Nonvested, beginning of period (shares) |  |  |  |  | 607,128 |
Granted (shares) |  |  |  |  | 157,789 |
Forfeited (shares) |  |  |  |  | (51,019) |
Nonvested, end of period (shares) |  |  |  |  | 724,807 |
Weighted-Average Grant Date Fair Value |  |  |  |  |  |
Weighted average grant-date fair value, nonvested, beginning of period (USD per share) |  |  |  |  | $ 24.69 |
Weighted average grant-date fair value, granted (USD per share) |  |  |  |  | 38.79 |
Weighted average grant-date fair value, forfeited (USD per share) |  |  |  |  | 24.87 |
Weighted average grant-date fair value, nonvested, ending of period (USD per share) |  | $ 38.79 | [1] |  | $ 27.90 |
Unrecognized compensation cost related to nonvested stock awards |  |  |  |  | $ 17,036 |
Compensation cost to be recognized over a weighted-average period |  |  |  |  | 3 years 1 month 6 days |
Pecentage of shares issued based on achievement of long term relative TSR performance |  |  |  | 40.00% |  |
Percentage of shares issued based on achievement of TSR performance |  |  |  | 60.00% |  |
PSU component performance period |  |  |  | 3 years |  |
Performance period |  | 3 years |  |  |  |
Granted (shares) |  |  |  |  | 157,789 |
Incremental granted (shares) | [2] |  |  |  | 10,909 |
Weighted average incremental grant-date fair value, granted (USD per share) | [2] |  |  |  | 24.54 |
weighted-average grant date fair value |  | $ 38.79 | [1] |  | $ 27.90 |
Risk-free interest rate (as a percent) | [3] | 4.37% |  |  |  |
Expected share price volatility (as a percent) | [4] | 62.50% |  |  |  |
Performance Stock Awards | Chief Executive Officer |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |  |  |
Granted (shares) |  | 63,114 |  |  |  |
Weighted-Average Grant Date Fair Value |  |  |  |  |  |
Weighted average grant-date fair value, nonvested, ending of period (USD per share) |  | $ 40.64 |  |  |  |
Granted (shares) |  | 63,114 |  |  |  |
weighted-average grant date fair value |  | $ 40.64 |  |  |  |
Performance Stock Awards | Officer |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |  |  |
Granted (shares) |  | 94,675 |  |  |  |
Weighted-Average Grant Date Fair Value |  |  |  |  |  |
Weighted average grant-date fair value, nonvested, ending of period (USD per share) |  | $ 37.55 |  |  |  |
Granted (shares) |  | 94,675 |  |  |  |
weighted-average grant date fair value |  | $ 37.55 |  |  |  |
Performance Stock Awards | Minimum |  |  |  |  |  |
Weighted-Average Grant Date Fair Value |  |  |  |  |  |
Component percentage in long-term incentive program |  |  |  | 55.00% |  |
Performance Stock Awards | Maximum |  |  |  |  |  |
Weighted-Average Grant Date Fair Value |  |  |  |  |  |
Component percentage in long-term incentive program |  |  |  | 60.00% |  |
[1] | The value of the PSU awards is estimated on the date of grant using a Monte Carlo simulation model. The valuation consists of computing the fair value using CBL's simulated stock price as well as TSR over a three-year performance period. The award is modeled as a contingent claim in that the expected return on the underlying shares is risk-free and the rate of discounting the payoff of the award is also risk-free. The weighted-average fair value per share related to the 2023 PSUs consists of 63,114 shares at a fair value of $40.64 per share (which relates to the relative TSR) and 94,675 shares at a fair value of $37.55 per share (which relates to absolute TSR).
[2] | PSUs granted shall be adjusted as if the shares of common stock represented by such PSUs had received any applicable stock or cash dividends declared. As for stock dividends, a number of PSUs shall be added to the target amount corresponding to the number of shares of common stock that would have been payable per such stock dividend on the then outstanding number of PSUs under the agreement as if common stock had been issued for such PSUs. As to cash dividends, a number of PSUs shall be added to the target amount corresponding to the number of shares of common stock that could have been acquired by the cash dividend payable on the then outstanding number of PSUs under the agreement as if common stock had been issued for such PSUs, and the calculation of the number of shares of common stock that could have been acquired shall be based on the closing price of the common stock on the record date for the cash dividend at issue.
[3] | The risk-free interest rate was based on the yield curve on zero-coupon U.S. Treasury securities in effect as of the valuation date, which is the grant date listed above.
[4] | The computation of expected volatility was based on the historical volatility of CBL's shares of common stock based on annualized daily total continuous returns over a three-year period and implied volatility data based on the trailing month average of daily implied volatilities implied by stock call option contracts that were both closest to the terms shown and closest to the money.

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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(03) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(02) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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