Investments in Partially Owned Entities (Urban Edge Properties) (Details) - UE - USD ($) $ in Thousands		9 Months Ended
Mar. 04, 2019	Sep. 30, 2019
Schedule Of Equity Method Investments
Shares sold (shares)	5,717,184
Proceeds from sale of equity method investments	$ 108,512
Gain on sale of equity investments		$ 62,395

The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585

Name:	us-gaap_ProceedsFromSaleOfEquityMethodInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration