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Dispositions (Details) ft² in Thousands, $ in Thousands					9 Months Ended
	Jan. 18, 2017 USD ($) ft²	Jul. 15, 2016 USD ($) ft²	May 31, 2016 USD ($)	Apr. 13, 2016 USD ($) ft²	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)
Discontinued Operations:
Gain (loss) on early extinguishment of debt, net					$ 0	$ 1,709
Flagstaff Mall
Discontinued Operations:
Gain (loss) on early extinguishment of debt, net		$ 5,284
Capitola Mall
Discontinued Operations:
Property area (in square feet) | ft²				586
Proceeds from sale				$ 93,000
Gain (loss) on disposal				$ 24,894
Mervyn's
Discontinued Operations:
Proceeds from sale			$ 3,200
Gain (loss) on disposal			$ (3,066)
Flagstaff Mall
Discontinued Operations:
Property area (in square feet) | ft²		347
Cascade Mall
Discontinued Operations:
Property area (in square feet) | ft²	589
Northgate Mall
Discontinued Operations:
Property area (in square feet) | ft²	750
Cascade and Northgate Malls
Discontinued Operations:
Proceeds from sale	$ 170,000
Gain (loss) on disposal	$ 59,698

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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
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2443-110228

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
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- Definition

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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