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.

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-Publisher FASB
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- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

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-Topic 323
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- Definition

The number of real estate properties, buildings or undeveloped land parcels sold during the period.

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Fair Value Measurements (Assets And Liabilities Measured On Nonrecurring Basis) (Details) $ in Thousands	2 Months Ended	3 Months Ended		12 Months Ended
	Feb. 26, 2021 Center	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2020 USD ($) property	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Assets:
Total Gains (Losses)				$ (24,153)	$ (74)	$ (10,120)
Number of centers sold	1			7
Fair Value, Nonrecurring [Member]
Assets:
Assets, fair value		$ 47,746	$ 25,984	$ 47,746	25,984
Total Gains (Losses)				(12,686)
Total Gains (Losses)					(3,070)
Fair Value, Nonrecurring [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Assets:
Assets, fair value		47,746	1,830	47,746	1,830
Fair Value, Nonrecurring [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Assets:
Assets, fair value			24,154		24,154
Fair Value, Nonrecurring [Member] \| Real Estate [Member]
Assets:
Assets, fair value		47,746		47,746
Total Gains (Losses)		12,700		(12,686)
Fair Value, Nonrecurring [Member] \| Real Estate [Member] \| Carrying Value [Member]
Assets:
Assets, fair value		60,400		60,400
Fair Value, Nonrecurring [Member] \| Real Estate [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Assets:
Assets, fair value		$ 47,746		$ 47,746
Fair Value, Nonrecurring [Member] \| Equity Method Investments [Member]
Assets:
Assets, fair value			25,984		25,984
Total Gains (Losses)			(3,100)		(3,070)
Fair Value, Nonrecurring [Member] \| Equity Method Investments [Member] \| Carrying Value [Member]
Assets:
Assets, fair value			29,100		29,100
Fair Value, Nonrecurring [Member] \| Equity Method Investments [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Assets:
Assets, fair value			1,830		1,830
Fair Value, Nonrecurring [Member] \| Equity Method Investments [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Assets:
Assets, fair value			$ 24,154		$ 24,154