Impairment (Schedule Of Impairment Charges) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Asset Impairment [Line Items]
Other	$ 0	$ 0	$ 216
Total impairment charges	98	153	1,024
Equity in earnings of real estate joint ventures and partnerships, net	20,642	19,300	22,317
Net impact of impairment charges	424	1,650	1,329
Property Marketed For Sale Or Sold [Member]
Asset Impairment [Line Items]
Impairment losses related to property	98	153	808
Impairment in Equity in Earnings (Losses) of Real Estate Joint Venture And Partnership Net [Member]
Asset Impairment [Line Items]
Equity in earnings of real estate joint ventures and partnerships, net	$ 326	$ 1,497	$ 305

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2420-110228

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The charge against earnings in the period to reduce the carrying amount of real property to fair value.

+ References

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This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(12))
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The charge against earnings resulting from the write down of long lived assets other than goodwill due to the difference between the carrying value and lower fair value.

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Asset Impairment [Line Items]

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Net Impact Of Impairment Charges on Income Statement

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