Investment in Consolidated and Unconsolidated Entities - Schedule of Consolidated Variable Interest Entities (Details) - River Oaks And Kyle Marketplace $ in Thousands	Dec. 31, 2018 USD ($)
Variable Interest Entity [Line Items]
Total assets	$ 44,091
Net assets	43,706
Net investment properties
Variable Interest Entity [Line Items]
Total assets	39,634
Other assets
Variable Interest Entity [Line Items]
Total assets	4,457
Liabilities
Variable Interest Entity [Line Items]
Liabilities	$ 385