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QUARTERLY INFORMATION (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 31, 2014 | Sep. 30, 2014 | Jan. 31, 2014 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2011
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  |  |  | $ 277,630 | $ 262,636 | $ 253,843 | $ 260,909 | $ 283,849 | $ 258,714 | $ 256,933 | $ 261,243 | $ 1,055,018 | $ 1,060,739 | $ 1,053,625 |
Income from operations |  |  |  | 8,687 | 94,007 | 89,858 | 85,032 | 104,335 | 97,386 | 97,253 | 76,169 | 277,584 | 375,143 |  |
Income from continuing operations |  |  |  | (26,953) | 44,432 | 48,331 | 53,205 | 87,406 | 57,204 | 44,077 | 64,292 | 119,015 | 252,979 | 115,317 |
Discontinued operations |  |  |  |  |  |  |  | 446 | 76 | 48 | (516) |  | 54 |  |
Net income (loss) |  |  |  | (26,953) | 44,432 | 48,331 | 53,205 | 87,852 | 57,280 | 44,125 | 63,776 | 119,015 | 253,033 |  |
Net income (loss) attributable to the Company |  |  |  | (22,257) | 37,569 | 41,895 | 46,164 | 76,556 | 49,342 | 37,958 | 55,294 | 103,371 | 219,150 |  |
Net income (loss) attributable to common shareholders |  |  |  | $ (33,480) | $ 26,346 | $ 30,672 | $ 34,941 | $ 65,333 | $ 38,119 | $ 26,735 | $ 44,071 | $ 58,479 | $ 174,258 |  |
Basic per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations, net of preferred dividends (in usd per share) |  |  |  | $ (0.20) | $ 0.15 | $ 0.18 | $ 0.21 | $ 0.38 | $ 0.22 | $ 0.16 | $ 0.26 | $ 0.34 | $ 1.02 |  |
Net income (loss) attributable to common shareholders (in usd per share) |  |  |  | (0.20) | 0.15 | 0.18 | 0.21 | 0.38 | 0.22 | 0.16 | 0.26 | 0.34 | 1.02 |  |
Diluted per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income (loss) from continuing operations, net of preferred dividends (in usd per share) |  |  |  | (0.20) | 0.15 | 0.18 | 0.20 | 0.38 | 0.22 | 0.16 | 0.26 | 0.34 | 1.02 |  |
Net income (loss) attributable to common shareholders (in usd per share) |  |  |  | $ (0.20) | $ 0.15 | $ 0.18 | $ 0.20 | $ 0.38 | $ 0.22 | $ 0.16 | $ 0.26 | $ 0.34 | $ 1.02 |  |
Loss on impairment of real estate |  |  |  |  |  |  |  |  |  |  |  | $ 105,945 | $ 17,858 | 70,049 |
Gain on investment |  |  |  |  |  |  | $ 16,560 |  |  |  |  | 16,560 |  | 2,400 |
Gain on sales of real estate assets |  |  |  | $ 14,065 |  | $ 14,173 |  |  |  |  |  | 32,232 | 5,342 | 1,980 |
Gain (loss) on extinguishment of debt |  |  |  |  |  |  |  |  |  |  |  | $ 256 | 87,893 | (9,108) |
Chesterfield Mall |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on impairment of real estate |  |  |  | $ 102,280 |  |  |  |  |  |  |  |  |  |  |
Chapel Hill Mall and Lakeshore Mall |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on impairment of real estate |  |  |  |  |  |  |  |  |  |  | $ 17,150 |  |  |  |
Citadel Mall |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on impairment of real estate |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 20,453 |
Gain (loss) on extinguishment of debt |  |  | $ 43,932 |  |  |  |  |  |  |  | $ 43,932 |  |  |  |
Chapel Hill Suburban |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on impairment of real estate |  |  |  |  |  |  |  |  |  |  |  |  | $ 12,050 |  |
Gain (loss) on extinguishment of debt |  | $ 18,296 |  |  |  |  |  |  | $ 18,296 |  |  |  |  |  |
Columbia Place |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on impairment of real estate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 50,683
Gain (loss) on extinguishment of debt | $ 27,171 |  |  |  |  |  |  | $ 27,171 |  |  |  |  |  |  |

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