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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Identified Intangible Assets And Liabilities (Schedule Of Future Amortization) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Above-Market and Below-Market Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization/(accretion)	$ (10,000)
In Place Leases [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization/(accretion)	$ 13,100
Rental Revenues [Member] \| Above-Market and Below-Market Leases [Member]
Finite-Lived Intangible Assets [Line Items]
2019 amortization/(accretion)		$ (2,668)
2020 amortization/(accretion)		(2,741)
2021 amortization/(accretion)		(2,712)
2022 amortization/(accretion)		(2,560)
2023 amortization/(accretion)		(2,529)
Amortization/(accretion)		(12,800)	$ (3,700)	$ (2,100)
Depreciation and Amortization [Member] \| In Place Leases [Member]
Finite-Lived Intangible Assets [Line Items]
2019 amortization/(accretion)		13,539
2020 amortization/(accretion)		12,564
2021 amortization/(accretion)		10,501
2022 amortization/(accretion)		8,472
2023 amortization/(accretion)		7,285
Amortization/(accretion)		29,800	21,000	18,000
Interest Expense [Member] \| Above-Market Assumed Mortgages [Member]
Finite-Lived Intangible Assets [Line Items]
2019 amortization/(accretion)		(327)
2020 amortization/(accretion)		(327)
2021 amortization/(accretion)		(287)
2022 amortization/(accretion)		(141)
2023 amortization/(accretion)		(136)
Amortization/(accretion)		$ (700)	$ (1,100)	$ (1,000)