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Dispositions: (Details) ft² in Thousands, $ in Thousands |  |  | 3 Months Ended
--- | --- | --- | ---
Nov. 19, 2015 USD ($) ft² | Jun. 30, 2015 USD ($) ft² | Mar. 31, 2016 USD ($) | Mar. 31, 2015 USD ($)
Discontinued Operations: |  |  |  |
Gain on early extinguishment of debt, net |  |  | $ (8,453) | $ (2,245)
Great Northern Mall | Great Northern Mall |  |  |  |
Discontinued Operations: |  |  |  |
Property area (in square feet) | ft² |  | 895 |  |
Gain on early extinguishment of debt, net |  | $ (1,627) |  |
Panorama Mall [Member] |  |  |  |
Discontinued Operations: |  |  |  |
Property area (in square feet) | ft² | 312 |  |  |
Proceeds from sale | $ 98,000 |  |  |
Gain (loss) on disposal | $ 73,726 |  |  |

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