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QUARTERLY INFORMATION (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2016 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Apr. 30, 2017
Real Estate Properties [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  | $ 235,356 | $ 224,650 | $ 229,233 | $ 238,013 | $ 258,493 | $ 251,721 | $ 254,965 | $ 263,078 | $ 927,252 | $ 1,028,257 | $ 1,055,018 |
Income from operations |  | 82,996 | 50,161 | 22,306 | 77,099 | 101,015 | 36,727 | 52,056 | 63,830 | 232,562 | 253,628 |  |
Net income (loss) |  | 40,538 | 9,299 | 70,627 | 38,518 | 79,872 | 670 | 73,097 | 41,892 | 158,982 | 195,531 |  |
Net income attributable to the Company |  | 36,464 | 8,965 | 41,396 | 34,115 | 68,830 | 1,059 | 62,919 | 40,074 | 120,940 | 172,882 |  |
Net income (loss) attributable to common shareholders |  | $ 25,241 | $ (2,258) | $ 30,173 | $ 22,892 | $ 57,607 | $ (10,164) | $ 51,696 | $ 28,851 | $ 76,048 | $ 127,990 |  |
Basic per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) attributable to common shareholders (in dollars per share) |  | $ 0.15 | $ (0.01) | $ 0.18 | $ 0.13 | $ 0.34 | $ (0.06) | $ 0.30 | $ 0.17 | $ 0.44 | $ 0.75 |  |
Diluted per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) attributable to common shareholders (in dollars per share) |  | $ 0.15 | $ (0.01) | $ 0.18 | $ 0.13 | $ 0.34 | $ (0.06) | $ 0.30 | $ 0.17 | $ 0.44 | $ 0.75 |  |
Loss on impairment of real estate |  |  |  |  |  |  |  |  |  | $ 71,401 | $ 116,822 | 105,945 |
Gain (loss) on sales of real estate assets |  |  |  |  |  |  |  |  |  | 93,792 | 29,567 | 32,232 |
Gain (loss) on extinguishment of debt |  |  |  |  |  |  |  |  |  | 30,927 |  | 256 |
Gain (loss) on investments |  |  |  |  |  |  |  |  |  | $ (6,197) | 7,534 | $ 16,560 |
The Outlet Shoppes at Oklahoma City, Oklahoma City, OK |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on sales of real estate assets |  |  |  | $ 75,434 |  |  |  |  |  |  |  |  |
River Ridge Mall, Lynchburg, VA |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on impairment of real estate | $ 84 |  |  |  |  |  |  |  | $ 9,510 |  | $ 9,594 |  |
2016 Dispositions |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on impairment of real estate |  |  |  |  |  |  | $ 53,558 | $ 43,493 | 19,685 |  |  |  |
Triangle Town Center |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on sales of real estate assets |  |  |  |  |  |  |  |  | $ 26,395 |  |  |  |
JG Gulf Coast Town Center LLC |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on investments |  |  |  |  |  |  |  | 29,267 |  |  |  |  |
Renaissance Center |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on sales of real estate assets |  |  |  |  |  |  |  | $ 29,437 |  |  |  |  |
Triangle Town Center |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |
Joint venture, ownership percentage |  |  |  |  |  |  |  |  | 50.00% |  |  |  |
Parent Company | The Outlet Shoppes at Oklahoma City, Oklahoma City, OK |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on sales of real estate assets |  |  |  | 48,800 |  |  |  |  |  |  |  |  |
Joint venture, ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  | 7500.00%
Parent Company | River Ridge Mall, Lynchburg, VA |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on sales of real estate assets |  |  |  | $ (5,843) |  |  |  |  |  |  |  |  |
Parent Company | The Outlet Shoppes at Oklahoma City, Oklahoma City, OK |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |
Joint venture, ownership percentage |  |  |  | 75.00% |  |  |  |  |  |  |  |  |
Parent Company | Triangle Town Center |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |
Joint venture, ownership percentage |  |  |  |  |  |  |  |  | 10.00% |  |  |  |
Acadiana Mall, Lafayette, LA |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on impairment of real estate |  |  |  | $ 43,007 |  |  |  |  |  |  |  |  |
Hickory Point |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on impairment of real estate |  |  | $ 24,525 |  |  |  |  |  |  |  |  |  |
Chesterfield Mall |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on extinguishment of debt |  |  |  | $ 20,420 |  |  |  |  |  |  |  |  |
Wausau Center, Wausau, WI |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on extinguishment of debt |  |  | $ 6,851 |  |  |  |  |  |  |  |  |  |
Corporate Joint Venture | The Outlet Shoppes at Oklahoma City, Oklahoma City, OK |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |
Joint venture, ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  | 2500.00%
Corporate Joint Venture | The Outlet Shoppes at Oklahoma City, Oklahoma City, OK |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |
Joint venture, ownership percentage |  |  |  | 25.00% |  |  |  |  |  |  |  |  |
Corporate Joint Venture | Triangle Town Center |  |  |  |  |  |  |  |  |  |  |  |  |
Diluted per share/unit data attributable to common shareholders/unitholders: |  |  |  |  |  |  |  |  |  |  |  |  |
Joint venture, ownership percentage |  |  |  |  |  |  |  |  | 90.00% |  |  |  |

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