The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Deferred Charges, Goodwill And Other Assets (Summary Of Scheduled Amortization) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]
2019	$ 2,491
2020	1,928
2021	1,941
2022	1,932
2023	2,072
Acquired Above Market Lease [Member]
Finite-Lived Intangible Assets [Line Items]
2019	(2,559)
2020	(2,377)
2021	(2,245)
2022	(2,132)
2023	(1,207)
Acquired Below-Market Lease Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
2019	5,050
2020	4,305
2021	4,186
2022	4,064
2023	3,279
In-Place Leases [Member]
Finite-Lived Intangible Assets [Line Items]
2019	10,494
2020	8,050
2021	6,884
2022	6,059
2023	4,943
Amortization expense	$ 17,900	$ 32,200	$ 14,300