Acquired In-Place Leases and Above/Below Market Leases Amortization for Acquired In-Place Leases During Next Five Years and Thereafter Assuming No Early Lease Terminations (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Below Market Lease, Net, Amortization Income, Fiscal Year Maturity [Abstract]
2019	$ 3,478
2020	2,647
2021	2,414
2022	2,242
2023	2,073
Thereafter	13,098
Acquired lease intangible liabilities, net	25,952	$ 30,182
In-place leases
Acquired Finite-Lived Intangible Assets [Line Items]
2019	1,620
2020	1,053
2021	719
2022	632
2023	539
Thereafter	1,718
Acquired lease intangible assets, net	6,281
Above market leases
Acquired Finite-Lived Intangible Assets [Line Items]
2019	339
2020	58
2021	28
2022	28
2023	27
Thereafter	38
Acquired lease intangible assets, net	$ 518