Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

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The expense recognized in the current period that allocates the cost of nonproduction tangible assets over their useful lives.

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Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Amount of gain (loss) from the difference between the sale price or salvage price and the book value of an asset that was sold or retired, and gain (loss) from the write down of assets from their carrying value to fair value.

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The difference between the carrying value and the sale price of an investment. A loss would be recognized when the sale price of the investment is less than the carrying value of the investment. This element refers to the Loss included in earnings and not to the cash proceeds of the sale.

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Property, net - Narrative (Details) - USD ($) $ in Thousands						3 Months Ended		9 Months Ended
	Jan. 18, 2017	May 31, 2016	Apr. 13, 2016	Jan. 14, 2016	Jan. 06, 2016	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Property, Plant and Equipment [Line Items]
Depreciation expense						$ 69,343	$ 68,792	$ 207,663	$ 206,870
Gain on sale or write down of assets, net						11,854	$ 19,321	(37,234)	(426,050)
Adjustment to contingent consideration									$ (12,180)
Cascade and Northgate Malls
Property, Plant and Equipment [Line Items]
Gain (loss) on disposal	$ 59,698
Write down of investment								10,138
Arrowhead Towne Center
Property, Plant and Equipment [Line Items]
Ownership interest					40.00%
Arrowhead Towne Center \| Joint Venture
Property, Plant and Equipment [Line Items]
Gain on sale or write down of assets, net					$ (101,629)
Ownership interest							40.00%		40.00%
MAC Heitman Portfolio \| Joint Venture
Property, Plant and Equipment [Line Items]
Gain on sale or write down of assets, net				$ (340,734)
Ownership interest				49.00%			49.00%		49.00%
Capitola Mall
Property, Plant and Equipment [Line Items]
Gain (loss) on disposal			$ 24,894
Former Mervyn's store
Property, Plant and Equipment [Line Items]
Gain (loss) on disposal		$ (3,066)
Southridge Center
Property, Plant and Equipment [Line Items]
Gain on sale or write down of assets, net						12,036		$ 12,036
Promenade at Casa Grande
Property, Plant and Equipment [Line Items]
Gain on sale or write down of assets, net						$ 23,335			$ 23,335
The Marketplace at Flagstaff Mall
Property, Plant and Equipment [Line Items]
Gain on sale or write down of assets, net									$ 7,188