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	Sep. 30, 2020 USD ($)
Finite-Lived Intangible Assets [Line Items]
Remainder of 2020	$ (1,783)
2021	(3,347)
2022	4,880
2023	9,645
2024	10,297
Thereafter	65,492
Total	$ 85,184