Represents the development cost written off during the period.

No definition available.

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
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- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

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.

+ References

No definition available.

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- Definition

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.

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Property, net - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended
	Jan. 18, 2017	Mar. 31, 2017	Mar. 31, 2016	Jan. 14, 2016	Jan. 06, 2016
Property, Plant and Equipment [Line Items]
Depreciation expense		$ 68,956	$ 69,903
Gain on sale or write down of assets, net		$ 49,565	434,456
Adjustment to contingent consideration			12,294
Development cost			696
Cascade and Northgate Malls
Property, Plant and Equipment [Line Items]
Gain on disposal	$ 59,713
Loss on Sale of Investments	$ (10,138)
Arrowhead Towne Center
Property, Plant and Equipment [Line Items]
Gain on sale or write down of assets, net			$ 104,293
Ownership interest			40.00%		40.00%
MAC Heitman Portfolio
Property, Plant and Equipment [Line Items]
Gain on land sales			$ 2,412
MAC Heitman Portfolio \| Joint Venture
Property, Plant and Equipment [Line Items]
Gain on sale or write down of assets, net			$ 340,741
Ownership interest			49.00%	49.00%