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Investment in Consolidated and Unconsolidated Entities - Schedule of Consolidated Variable interest Entities (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Variable Interest Entity [Line Items]    
Total assets $ 43,760 $ 44,091
Liabilities (555) (385)
Net assets 43,205 43,706
Net investment properties    
Variable Interest Entity [Line Items]    
Total assets 39,392 39,634
Other assets    
Variable Interest Entity [Line Items]    
Total assets $ 4,368 $ 4,457