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Real Estate Fund Investments - Summary of Fair Value of Fund Investments and Income from Fund Investments (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2015
Dec. 31, 2015
Investment Holdings [Line Items]    
Property Funds   $ 248,824
Alternative Investment Fund   167,614
Total   $ 416,438
Income from real estate fund investments $ 5,221  
Less noncontrolling interests (3,218)  
Our share of income from real estate funds 2,003  
Investment income [Member]    
Investment Holdings [Line Items]    
Income from real estate fund investments 4,495  
Investment expenses [Member]    
Investment Holdings [Line Items]    
Income from real estate fund investments 147  
Net investment income [Member]    
Investment Holdings [Line Items]    
Income from real estate fund investments 4,348  
Net unrealized gains [Member]    
Investment Holdings [Line Items]    
Income from real estate fund investments $ 873