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		6 Months Ended
	Jan. 18, 2017	May 31, 2016	Apr. 13, 2016	Jan. 14, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2016	Jan. 06, 2016
Property, Plant and Equipment [Line Items]
Depreciation expense					$ 69,364	$ 68,175	$ 138,320	$ 138,078
Gain on sale or write down of assets, net					$ (477)	10,915	49,088	445,371
Adjustment to contingent consideration								14,750
Cascade and Northgate Malls
Property, Plant and Equipment [Line Items]
Gain (loss) on disposal	$ 59,698
Write down of investment							(10,138)
Capitola Mall
Property, Plant and Equipment [Line Items]
Gain (loss) on disposal			$ 24,894			24,894		24,894
Freestanding store
Property, Plant and Equipment [Line Items]
Gain (loss) on disposal		$ (3,066)				3,066		$ 3,066
The Marketplace at Flagstaff Mall
Property, Plant and Equipment [Line Items]
Gain (loss) on disposal						(7,188)	$ 7,188
Arrowhead Towne Center
Property, Plant and Equipment [Line Items]
Gain on sale or write down of assets, net						$ 101,629
Ownership interest						40.00%		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%