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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

The number of countries in which the entity operates as of balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of states the entity operates in as of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- 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.

+ Details

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Organization (Details)	Sep. 30, 2016 state country property	Jan. 01, 2016 property	Dec. 31, 2015 property	May 11, 2015	Mar. 31, 2015	Dec. 31, 2014
U.S. and Puerto Rico
Real Estate Properties
Number of properties	204
Number of U.S. states containing property locations \| state	37
U.S. and Puerto Rico \| Malls
Real Estate Properties
Number of properties	108
U.S. and Puerto Rico \| Premium Outlets
Real Estate Properties
Number of properties	71
U.S. and Puerto Rico \| The Mills
Real Estate Properties
Number of properties	14
U.S. and Puerto Rico \| Lifestyle/Community Centers
Real Estate Properties
Number of properties	4
U.S. and Puerto Rico \| Other
Real Estate Properties
Number of properties	7
Japan \| Premium Outlets
Real Estate Properties
Number of properties	9
South Korea \| Premium Outlets
Real Estate Properties
Number of properties	3
Canada \| Premium Outlets
Real Estate Properties
Number of properties	2
Canada \| Designer Outlet properties
Real Estate Properties
Number of properties	1
Europe and Canada \| Designer Outlet properties \| Consolidated properties
Real Estate Properties
Number of properties	4
Mexico \| Premium Outlets
Real Estate Properties
Number of properties	1
Malaysia \| Premium Outlets
Real Estate Properties
Number of properties	1
Europe \| Klepierre
Real Estate Properties
Ownership percentage	20.30%			20.30%	18.30%	28.90%
Number of countries \| country	16
Europe \| Designer Outlet properties
Real Estate Properties
Number of properties	6	6	6
Italy \| Designer Outlet properties
Real Estate Properties
Number of properties	2
Austria \| Designer Outlet properties
Real Estate Properties
Number of properties	1
Germany \| Designer Outlet properties
Real Estate Properties
Number of properties	1
Netherlands \| Designer Outlet properties
Real Estate Properties
Number of properties	1
United Kingdom \| Designer Outlet properties
Real Estate Properties
Number of properties	1