Variable Interest Entities (Summary Of Consolidated Variable Interest Entities) (Details) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2020 USD ($) item	Dec. 31, 2019 USD ($) item
Variable Interest Entity [Line Items]
Assets	$ 4,384,788	$ 3,937,934
Number of VIE real estate joint ventures guaranteed by company \| item	1	1
Variable Interest Entity, Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Assets	$ 225,811	$ 228,954
Assets Held as Collateral for Debt	37,731	39,782
Maximum Risk of Loss	$ 29,784	$ 29,784

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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- Definition

Amount of consolidated variable interest entity's (VIE) assets that can only be used to settle obligations of VIE.

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- Definition

The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

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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.

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Variable Interest Entity, Qualitative or Quantitative Information, Number of VIE's Guaranteed by Company

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