Acquired Intangible Assets and Liabilities (Schedule of Estimated Annual Amortization of Below Market Leases) (Details) - Below-Market Leases, Net of Above-Market Leases $ in Thousands	Dec. 31, 2019 USD ($)
Finite-Lived Intangible Assets [Line Items]
2020	$ (10,648)
2021	(3,501)
2022	4,735
2023	9,500
2024	10,149
Thereafter	63,724
Total	$ 73,959