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ACQUISITION AND DISPOSITION OF PROPERTIES, DISCONTINUED OPERATIONS AND PROPERTIES HELD FOR SALE - Discontinued Operations (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
STATEMENTS OF INCOME |  |  |  |  |  |  |
Total revenues |  |  |  |  |  | $ 0 | $ 20,920
Total expenses |  |  |  |  |  | 0 | 14,102
Operating income |  |  |  |  | $ 0 | 0 | 6,818
Impairment of assets |  |  |  |  |  | 0 | (6,683)
Loss on debt extinguishment |  |  |  |  | 0 | 0 | (800)
Gain on disposition of properties |  |  |  |  | 0 | 1,222 | 18,802
Income from discontinued operations |  |  |  |  | 0 | 1,222 | 18,137
Income from discontinued operations attributable to noncontrolling interests |  |  |  |  | $ 0 | (1,023) | (12,048)
Income from discontinued operations attributable to Common Shareholders | $ 100 | $ 0 | $ 99 | $ 0 |  | $ 199 | $ 6,089

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