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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Tenant receivables allowance for doubtful accounts $ 2,062 $ 2,011
Other receivables allowance for doubtful accounts $ 838 $ 838
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, shares authorized (in shares) 15,000,000 15,000,000
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 350,000,000 350,000,000
Common stock, shares issued (in shares) 172,656,783 171,088,778
Common stock, shares outstanding (in shares) 172,656,783 171,088,778
Series D Preferred Stock    
Preferred stock, dividend rate 7.375% 7.375%
Preferred stock, shares outstanding (in shares) 1,815,000 1,815,000
Series E Preferred Stock    
Preferred stock, dividend rate 6.625% 6.625%
Preferred stock, shares outstanding (in shares) 690,000 690,000
CBL & Associates Limited Partnership    
Tenant receivables allowance for doubtful accounts $ 2,062 $ 2,011
Other receivables allowance for doubtful accounts $ 838 $ 838