Acquisitions, Dispositions, Impairment, and Discontinued Operations (Summary Of Income From Discontinued Operations) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Property revenues			$ 19,184
Property expenses			(6,898)
Property revenues less property expenses			12,286
Property Management Expense			(242)
Depreciation and amortization			(4,327)
Income tax expense			(112)
Income from discontinued operations	$ 0	$ 0	7,605
Gain on sale of discontinued operations, net of tax	$ 0	$ 0	$ 375,237

Property revenues less property expenses relating to discontinued operations for the period

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Amount of property management expense attributable to discontinued operations.

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Amount of deprecation and amortization expense attributable to property, plant and equipment and intangible assets of discontinued operations.

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Amount after tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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Amount after tax of income (loss) from operations classified as a discontinued operation. Excludes gain (loss) on disposal and provision for gain (loss) until disposal.

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Amount of tax expense (benefit) attributable to income (loss) from operations classified as a discontinued operation. Excludes tax expense (benefit) for gain (loss) on disposal and for provision for gain (loss) until disposal.

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Amount of operating expense attributable to disposal group, including, but not limited to, discontinued operation.

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