Summary of Significant Accounting Policies - Summary of Deferred Leasing Intangibles (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Total deferred leasing intangibles, net, included in total assets	$ 29,678	$ 30,481
Total deferred leasing intangibles, net, included in total liabilities	9,560	10,355
In-Place Leases
Finite-Lived Intangible Assets [Line Items]
Total deferred leasing intangibles, net, included in total assets	19,971	19,921
Above Market Leases
Finite-Lived Intangible Assets [Line Items]
Total deferred leasing intangibles, net, included in total assets	2,569	2,298
Below Market Ground Lease Obligation
Finite-Lived Intangible Assets [Line Items]
Total deferred leasing intangibles, net, included in total assets	1,643	1,688
Tenant Relationships
Finite-Lived Intangible Assets [Line Items]
Total deferred leasing intangibles, net, included in total assets	5,495	6,574
Below Market Leases
Finite-Lived Intangible Assets [Line Items]
Total deferred leasing intangibles, net, included in total liabilities	$ 9,560	$ 10,355