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Discontinued Operations: (Details) (USD $) In Thousands, unless otherwise specified | 0 Months Ended | 3 Months Ended | 9 Months Ended | 0 Months Ended |  | 0 Months Ended |  | 0 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 11, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | May 31, 2013 Green Tree Mall sqft | Jun. 04, 2013 Northridge Mall sqft | Dec. 04, 2013 Mervyn's | Oct. 23, 2013 Mervyn's | Oct. 15, 2013 Mervyn's | Sep. 11, 2013 Mervyn's | Jun. 04, 2013 Rimrock Mall sqft | Jun. 04, 2013 Rimrock Mall and Nortridge Mall | Sep. 30, 2013 Fiesta Mall sqft | Dec. 11, 2013 Chesterfield Towne Center sqft | Dec. 11, 2013 Centre at Salisbury sqft | Dec. 11, 2013 Chesterfield Towne Center
Discontinued Operations: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property area (in square feet) |  |  |  |  |  | 793,000 | 890,000 |  |  |  |  | 603,000 |  | 933,000 | 1,016,000 | 862,000 |
Proceeds from sale | $ 292,500 |  |  |  |  | $ 79,000 |  | $ 10,475 | $ 5,430 | $ 5,700 | $ 12,000 |  | $ 230,000 |  |  |  |
Gain (loss) from sale |  | 0 | (7,767) | 0 | 134,145 | 59,767 |  | (5,257) | 1,695 | (2,031) | (2,633) |  | 82,151 |  |  |  | 151,467
Gain (loss) on extinguishment of debt |  | (46) | (6) | (405) | 1,938 |  |  |  |  |  |  |  |  | 1,401 |  |  |
Cash payment |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 67,763 |  |
Assumption of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 109,737 | 115,000 |
Revenues from discontinued operations |  | 10,926 |  | 47,427 |  |  |  |  |  |  |  |  |  |  |  |  |
(Loss) income from discontinued operations |  | $ 0 | $ (8,844) | $ 0 | $ 137,112 |  |  |  |  |  |  |  |  |  |  |  |

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