Acquired Intangible Assets And Liabilities (Schedule of Estimated Annual Amortization of Intangible Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Acquired in-place lease value
Finite-Lived Intangible Assets [Line Items]
Remainder of 2019	$ 101,543
2020	111,585
2021	87,036
2022	65,153
2023	53,596
Thereafter	191,223
Net	610,136	$ 774,368
Tenant relationships
Finite-Lived Intangible Assets [Line Items]
Remainder of 2019	92,301
2020	123,069
2021	123,069
2022	123,069
2023	123,069
Thereafter	1,058,638
Net	$ 1,643,215