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Condensed Consolidated Statements of Equity/Capital - USD ($) $ in Thousands | Total | Preferred Stock | Common Stock | Additional Paid-in Capital | Dividends in Excess of Cumulative Earnings | Total Shareholders' Equity/Partners' Capital | Noncontrolling Interests | Redeemable Noncontrolling Interests | CBL & Associates Limited Partnership | CBL & Associates Limited Partnership Total Shareholders' Equity/Partners' Capital | CBL & Associates Limited Partnership Preferred Units | CBL & Associates Limited Partnership Common Units | CBL & Associates Limited Partnership General Partner | CBL & Associates Limited Partnership Limited Partners | CBL & Associates Limited Partnership Noncontrolling Interests | CBL & Associates Limited Partnership Redeemable Common Units
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Beginning balance of redeemable noncontrolling partnership interests at Dec. 31, 2016 |  |  |  |  |  |  |  | $ 17,996 |  |  |  |  |  |  |  | $ 17,996
Redeemable Noncontrolling Interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  |  |  |  | 481 |  |  |  |  |  |  |  | 481
Distributions declared - common units | $ (136,021) |  |  |  | $ (136,021) | $ (136,021) |  |  | $ (159,724) | $ (159,724) |  |  | $ (1,600) | $ (158,124) |  | (3,429)
Adjustment for noncontrolling interests | (2,222) |  |  | $ (5,635) |  | (5,635) | $ 3,413 | 2,224 |  |  |  |  |  |  |  |
Allocation of partners' capital |  |  |  |  |  |  |  |  | (2,259) | (2,259) |  |  | (68) | (2,191) |  | 2,224
Adjustment to record redeemable interests at redemption value | 4,195 |  |  | 3,629 |  | 3,629 | 566 | (4,196) | 4,195 | 4,195 |  |  | 43 | 4,152 |  | (4,196)
Distributions to noncontrolling interests | (48,477) |  |  |  |  |  | (48,477) | (3,429) | (24,774) |  |  |  |  |  | $ (24,774) |
Ending balance of redeemable noncontrolling partnership interests at Sep. 30, 2017 |  |  |  |  |  |  |  | 13,076 |  |  |  |  |  |  |  | 13,076
Beginning balance at Dec. 31, 2016 | 1,340,852 | $ 25 | $ 1,708 | 1,969,059 | (742,078) | 1,228,714 | 112,138 |  |  |  |  |  |  |  |  |
Beginning balance of units (shares) at Dec. 31, 2016 |  |  |  |  |  |  |  |  |  |  | 25,050,000 | 199,085,000 |  |  |  |
Beginning balance at Dec. 31, 2016 |  |  |  |  |  |  |  |  | 1,341,179 | 1,329,076 | $ 565,212 |  | 7,781 | 756,083 | 12,103 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | 117,963 |  |  |  | 84,476 | 84,476 | 33,487 |  | 117,963 | 92,697 | 33,669 |  | 607 | 58,421 | 25,266 |
Dividends/Distributions declared - common stock/units | (136,021) |  |  |  | (136,021) | (136,021) |  |  | (159,724) | (159,724) |  |  | (1,600) | (158,124) |  | (3,429)
Dividends/Distributions declared - preferred stock/units | (33,669) |  |  |  | (33,669) | (33,669) |  |  | (33,669) | (33,669) | $ (33,669) |  |  |  |  |
Issuance of common stock and restricted common stock | $ 474 |  | 3 | 471 |  | 474 |  |  |  |  |  |  |  |  |  |
Issuances of common units (shares) | 342,008 |  |  |  |  |  |  |  |  |  |  | 342,000 |  |  |  |
Issuances of common units |  |  |  |  |  |  |  |  | 474 | 474 |  |  |  | 474 |  |
Redemptions of Operating Partnership common units | $ (593) |  |  |  |  |  | (593) |  |  |  |  |  |  |  |  |
Redemptions of common units (shares) |  |  |  |  |  |  |  |  |  |  |  | (73,000) |  |  |  |
Redemptions of common units |  |  |  |  |  |  |  |  | (593) | (593) |  |  |  | (593) |  |
Cancellation of restricted common stock/units (shares) | (37,758) |  |  |  |  |  |  |  |  |  |  | (38,000) |  |  |  |
Cancellation of restricted common stock/units | $ (327) |  |  | (327) |  | (327) |  |  | (327) | (327) |  |  |  | (327) |  |
Performance stock units | 1,115 |  |  | 1,115 |  | 1,115 |  |  | 1,115 | 1,115 |  |  | 11 | 1,104 |  |
Amortization of deferred compensation | 3,135 |  |  | 3,135 |  | 3,135 |  |  | 3,135 | 3,135 |  |  | 32 | 3,103 |  |
Allocation of partners' capital |  |  |  |  |  |  |  |  | (2,259) | (2,259) |  |  | (68) | (2,191) |  | 2,224
Adjustment for noncontrolling interests | (2,222) |  |  | (5,635) |  | (5,635) | 3,413 | 2,224 |  |  |  |  |  |  |  |
Adjustment to record redeemable noncontrolling interests at redemption value | 4,195 |  |  | 3,629 |  | 3,629 | 566 | (4,196) | 4,195 | 4,195 |  |  | 43 | 4,152 |  | (4,196)
Deconsolidation of investment | (2,232) |  |  |  |  |  | (2,232) |  | (2,232) |  |  |  |  |  | (2,232) |
Contributions from noncontrolling interests | 263 |  |  |  |  |  | 263 |  | 263 |  |  |  |  |  | 263 |
Distributions to noncontrolling interests | (48,477) |  |  |  |  |  | (48,477) | (3,429) | (24,774) |  |  |  |  |  | (24,774) |
Ending balance at Sep. 30, 2017 | 1,244,456 | 25 | 1,711 | 1,971,447 | (827,292) | 1,145,891 | 98,565 |  |  |  |  |  |  |  |  |
Ending balance of units (shares) at Sep. 30, 2017 |  |  |  |  |  |  |  |  |  |  | 25,050,000 | 199,316,000 |  |  |  |
Ending balance at Sep. 30, 2017 |  |  |  |  |  |  |  |  | 1,244,746 | 1,234,120 | $ 565,212 |  | 6,806 | 662,102 | 10,626 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative effect of accounting change | Accounting Standards Update 2016-16 | 11,433 |  |  |  | 11,433 | 11,433 |  |  | 11,433 | 11,433 |  |  | 117 | 11,316 |  |
Cumulative effect of accounting change | Accounting Standard Update 2014-09 and Accounting Standard Update 2017-05 | 58,947 |  |  |  | 58,947 | 58,947 |  |  | 58,947 | 58,947 |  |  | 605 | 58,342 |  |
Beginning balance of redeemable noncontrolling partnership interests at Dec. 31, 2017 | 8,835 |  |  |  |  |  |  | 8,835 | 8,835 |  |  |  |  |  |  | 8,835
Redeemable Noncontrolling Interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  |  |  |  | (515) |  |  |  |  |  |  |  | (515)
Distributions declared - common units | (103,597) |  |  |  | (103,597) | (103,597) |  |  | (121,643) | (121,643) |  |  | (1,207) | (120,436) |  | (3,429)
Adjustment for noncontrolling interests | (3,033) |  |  | (15,329) |  | (15,329) | 12,296 | 3,033 |  |  |  |  |  |  |  |
Allocation of partners' capital |  |  |  |  |  |  |  |  | (3,075) | (3,075) |  |  | (81) | (2,994) |  | 3,033
Adjustment to record redeemable interests at redemption value | 1,696 |  |  | 1,474 |  | 1,474 | 222 | (1,696) | 1,696 | 1,696 |  |  | 17 | 1,679 |  | (1,696)
Distributions to noncontrolling interests | (23,439) |  |  |  |  |  | (23,439) | (3,429) | (5,392) |  |  |  |  |  | (5,392) |
Ending balance of redeemable noncontrolling partnership interests at Sep. 30, 2018 | 6,228 |  |  |  |  |  |  | 6,228 | 6,228 |  |  |  |  |  |  | 6,228
Beginning balance at Dec. 31, 2017 | 1,236,478 | 25 | 1,711 | 1,974,537 | (836,269) | 1,140,004 | 96,474 |  |  |  |  |  |  |  |  |
Beginning balance of units (shares) at Dec. 31, 2017 |  |  |  |  |  |  |  |  |  |  | 25,050,000 | 199,297,000 |  |  |  |
Beginning balance at Dec. 31, 2017 |  |  |  |  |  |  |  |  | 1,236,768 | 1,227,067 | $ 565,212 |  | 6,735 | 655,120 | 9,701 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | (33,093) |  |  |  | (24,261) | (24,261) | (8,832) |  | (33,093) | (32,724) | 33,669 |  | (682) | (65,711) | (369) |
Dividends/Distributions declared - common stock/units | (103,597) |  |  |  | (103,597) | (103,597) |  |  | (121,643) | (121,643) |  |  | (1,207) | (120,436) |  | (3,429)
Dividends/Distributions declared - preferred stock/units | (33,669) |  |  |  | (33,669) | (33,669) |  |  | (33,669) | (33,669) | $ (33,669) |  |  |  |  |
Issuance of common stock and restricted common stock | 817 |  | 7 | 810 |  | 817 |  |  |  |  |  |  |  |  |  |
Conversion of 915,338 Operating Partnership common units into shares of common stock | $ 0 |  | 9 | 3,050 |  | 3,059 | (3,059) |  |  |  |  |  |  |  |  |
Issuances of common units (shares) | 716,290 |  |  |  |  |  |  |  |  |  |  | 715,000 |  |  |  |
Issuances of common units |  |  |  |  |  |  |  |  | 817 | 817 |  |  |  | 817 |  |
Redemptions of Operating Partnership common units | $ (2,246) |  |  |  |  |  | (2,246) |  |  |  |  |  |  |  |  |
Redemptions of common units (shares) |  |  |  |  |  |  |  |  |  |  |  | (527,000) |  |  |  |
Redemptions of common units |  |  |  |  |  |  |  |  | (2,246) | (2,246) |  |  |  | (2,246) |  |
Cancellation of restricted common stock/units (shares) | (56,533) |  |  |  |  |  |  |  |  |  |  | (57,000) |  |  |  |
Cancellation of restricted common stock/units | $ (249) |  |  | (249) |  | (249) |  |  | (249) | (249) |  |  |  | (249) |  |
Performance stock units | 993 |  |  | 993 |  | 993 |  |  | 993 | 993 |  |  | 10 | 983 |  |
Forfeiture of performance stock units | (250) |  |  | (250) |  | (250) |  |  | (250) | (250) |  |  | (3) | (247) |  |
Amortization of deferred compensation | 2,846 |  |  | 2,846 |  | 2,846 |  |  | 2,846 | 2,846 |  |  | 29 | 2,817 |  |
Allocation of partners' capital |  |  |  |  |  |  |  |  | (3,075) | (3,075) |  |  | (81) | (2,994) |  | 3,033
Adjustment for noncontrolling interests | (3,033) |  |  | (15,329) |  | (15,329) | 12,296 | 3,033 |  |  |  |  |  |  |  |
Adjustment to record redeemable noncontrolling interests at redemption value | 1,696 |  |  | 1,474 |  | 1,474 | 222 | (1,696) | 1,696 | 1,696 |  |  | 17 | 1,679 |  | $ (1,696)
Contributions from noncontrolling interests | 7,859 |  |  |  |  |  | 7,859 |  | 7,859 |  |  |  |  |  | 7,859 |
Distributions to noncontrolling interests | (23,439) |  |  |  |  |  | (23,439) | $ (3,429) | (5,392) |  |  |  |  |  | (5,392) |
Ending balance at Sep. 30, 2018 | $ 1,121,493 | $ 25 | $ 1,727 | $ 1,967,882 | $ (927,416) | $ 1,042,218 | $ 79,275 |  |  |  |  |  |  |  |  |
Ending balance of units (shares) at Sep. 30, 2018 |  |  |  |  |  |  |  |  |  |  | 25,050,000 | 199,428,000 |  |  |  |
Ending balance at Sep. 30, 2018 |  |  |  |  |  |  |  |  | $ 1,121,742 | $ 1,109,943 | $ 565,212 |  | $ 5,540 | $ 539,191 | $ 11,799 |

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