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Property, net - Narrative (Details) - USD ($) $ in Thousands					3 Months Ended		6 Months Ended
	May 31, 2016	Apr. 13, 2016	Jan. 14, 2016	Jan. 06, 2016	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Property, Plant and Equipment [Line Items]
Depreciation expenses					$ 68,175	$ 91,124	$ 138,078	$ 181,321
Gain (loss) on sale or write down of assets, net					10,915	(4,671)	445,371	(3,736)
Gain on sale or write down of assets, net					5	423		423
Impairment loss						$ 5,916		$ 5,916
Adjustment to contingent consideration					(2,456)		(14,750)
The Market Place at Flagstaff
Property, Plant and Equipment [Line Items]
Gain (loss) on sale or write down of assets, net					(7,188)		(7,188)
Capitola Mall
Property, Plant and Equipment [Line Items]
Gain (loss) on sale or write down of assets, net		$ 24,897			24,897		24,897
Mervyn's
Property, Plant and Equipment [Line Items]
Gain (loss) on sale or write down of assets, net	$ (3,058)				$ (3,058)		(3,058)
Arrowhead Towne Center
Property, Plant and Equipment [Line Items]
Gain on sale or write down of assets, net				$ 104,297			$ 104,297
Ownership interest sold (percent)				40.00%			40.00%
MAC Heitman Portfolio
Property, Plant and Equipment [Line Items]
Gain on sale or write down of assets, net			$ 340,745				$ 340,745
Ownership interest sold (percent)			49.00%				49.00%

X

- Definition

Represents the amount of gain or loss resulting from either the difference between the carrying value and the sales price or remeasurement of the carrying value of assets during the period, reported by an equity method investment of the entity.

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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 that was sold by the entity during the period.

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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
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 4
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- Definition

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

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-Name Accounting Standards Codification
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The charge against earnings in the period to reduce the carrying amount of real property to fair value.

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