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Dispositions: (Details) $ in Thousands |  |  |  |  |  |  |  |  |  | 6 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 29, 2014 USD ($) ft² | Oct. 31, 2014 USD ($) ft² | Oct. 10, 2014 USD ($) | Sep. 11, 2014 USD ($) | Aug. 28, 2014 USD ($) | Jul. 07, 2014 USD ($) | Mar. 17, 2014 USD ($) ft² note | Feb. 14, 2014 USD ($) ft² | Jan. 15, 2014 USD ($) ft² | Jun. 30, 2015 USD ($) ft² | Jun. 30, 2014 USD ($)
Discontinued Operations: |  |  |  |  |  |  |  |  |  |  |
Gains (Losses) on Extinguishment of Debt |  |  |  |  |  |  |  |  |  | $ 636 | $ (358)
Camelback Colonnade |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations: |  |  |  |  |  |  |  |  |  |  |
Property area (in square feet) | ft² | 619,000 |  |  |  |  |  |  |  |  |  |
Proceeds from sale | $ 92,898 |  |  |  |  |  |  |  |  |  |
Gain (loss) from sale | $ 24,554 |  |  |  |  |  |  |  |  |  |
Percentage of loan assumed by third party (as a percent) | 67.50% |  |  |  |  |  |  |  |  |  |
Cash payment | $ 61,173 |  |  |  |  |  |  |  |  |  |
Assumption of debt | 31,725 |  |  |  |  |  |  |  |  |  |
Notes payable discharged | 47,946 |  |  |  |  |  |  |  |  |  |
Noncontrolling interest adjustment | $ 17,217 |  |  |  |  |  |  |  |  |  |
Rotterdam Square |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations: |  |  |  |  |  |  |  |  |  |  |
Property area (in square feet) | ft² |  |  |  |  |  |  |  |  | 585,000 |  |
Proceeds from sale |  |  |  |  |  |  |  |  | $ 8,500 |  |
Gain (loss) from sale |  |  |  |  |  |  |  |  | $ (472) |  |
Somersville Town Center |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations: |  |  |  |  |  |  |  |  |  |  |
Property area (in square feet) | ft² |  |  |  |  |  |  |  | 348,000 |  |  |
Proceeds from sale |  |  |  |  |  |  |  | $ 12,337 |  |  |
Gain (loss) from sale |  |  |  |  |  |  |  | $ (263) |  |  |
Lake Square Mall |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations: |  |  |  |  |  |  |  |  |  |  |
Property area (in square feet) | ft² |  |  |  |  |  |  | 559,000 |  |  |  |
Proceeds from sale |  |  |  |  |  |  | $ 13,280 |  |  |  |
Gain (loss) from sale |  |  |  |  |  |  | (876) |  |  |  |
Cash payment |  |  |  |  |  |  | $ 3,677 |  |  |  |
Lake Square Mall | Notes Receivable |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations: |  |  |  |  |  |  |  |  |  |  |
Number of notes receivable (in notes) | note |  |  |  |  |  |  | 2 |  |  |  |
Notes receivable |  |  |  |  |  |  | $ 9,603 |  |  |  |
Mervyn's |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations: |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale |  |  | $ 1,900 | $ 1,200 | $ 3,500 | $ 3,560 |  |  |  |  |
Gain (loss) from sale |  |  | $ (3) | $ 315 | $ (80) | $ (158) |  |  |  |  |
South Towne Center |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations: |  |  |  |  |  |  |  |  |  |  |
Property area (in square feet) | ft² |  | 1,278,000 |  |  |  |  |  |  |  |  |
Proceeds from sale |  | $ 205,000 |  |  |  |  |  |  |  |  |
Gain (loss) from sale |  | $ 121,873 |  |  |  |  |  |  |  |  |
Great Northern Mall |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations: |  |  |  |  |  |  |  |  |  |  |
Gains (Losses) on Extinguishment of Debt |  |  |  |  |  |  |  |  |  | $ 1,609 |
Great Northern Mall | Great Northern Mall |  |  |  |  |  |  |  |  |  |  |
Discontinued Operations: |  |  |  |  |  |  |  |  |  |  |
Property area (in square feet) | ft² |  |  |  |  |  |  |  |  |  | 895,000 |
Gains (Losses) on Extinguishment of Debt |  |  |  |  |  |  |  |  |  | $ 1,609 |

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