Acquired Lease Intangibles (Details) - Future Amortization of Acquired Lease Intangible Assets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Acquired Lease Intangibles (Details) - Future Amortization of Acquired Lease Intangible Assets [Line Items]
Acquired lease intangible assets, net	$ 72,109	$ 82,778
Acquired Lease Intangible Assets
Acquired Lease Intangibles (Details) - Future Amortization of Acquired Lease Intangible Assets [Line Items]
2019	10,573
2020	8,566
2021	6,898
2022	5,705
2023	5,092
Thereafter	35,275
Acquired lease intangible assets, net	$ 72,109