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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Available-for-sale securities, amortized cost	$ 232,774	$ 233,053
Preferred stock, par value (USD per share)	$ 0.01	$ 0.01
Preferred stock authorized (shares)	15,000,000	15,000,000
Common stock, par value (USD per share)	$ 0.01	$ 0.01
Common stock authorized (shares)	350,000,000	350,000,000
Common stock issued (shares)	196,458,778	196,569,917
Common stock outstanding (shares)	196,458,778	196,569,917
Variable interest asset entities	$ 4,280,187	$ 4,443,740
CBL & Associates Limited Partnership
Available-for-sale securities, amortized cost	232,774	233,053
Variable interest asset entities	4,280,537	$ 4,444,092
Variable Interest Entity Primary Beneficiary
Variable interest asset entities	266,669
Variable Interest Entity Primary Beneficiary | CBL & Associates Limited Partnership
Variable interest asset entities	266,669
Variable interest liability entities	132,762
Variable Interest Entity Primary Beneficiary | Nonrecourse
Variable interest liability entities	$ 132,762
Series D Preferred Stock
Preferred stock outstanding (shares)	1,815,000	1,815,000
Dividend rate of preferred stock (as a percent)	7.375%	7.375%
Series E Preferred Stock
Preferred stock outstanding (shares)	690,000	690,000
Dividend rate of preferred stock (as a percent)	6.625%	6.625%

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