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Property, net - Narrative (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended
--- | --- | --- | ---
Jan. 14, 2016 | Jan. 06, 2016 | Mar. 31, 2016 | Mar. 31, 2015
Property, Plant and Equipment [Line Items] |  |  |  |
Depreciation expenses |  |  | $ 69,903 | $ 90,197
Gain on sale or write down of assets, net |  |  | (5) |
Land sales |  |  | 2,412 | 1,056
Adjustment to contingent consideration |  |  | (12,294) |
Loss on Sale or Write-Down of Assets |  |  |  | (121)
Development cost |  |  | 696 |
Gain on sale or write down of assets, net |  |  | 434,456 | $ 935
Arrowhead Towne Center |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Gain on sale or write down of assets, net |  |  | $ 104,293 |
Ownership interest sold (as a percent) |  | 40.00% | 40.00% |
MAC Heitman Portfolio |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |
Gain on sale or write down of assets, net | $ 340,741 |  |  |
Ownership interest sold (as a percent) | 49.00% |  |  |

X
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