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Real Estate Joint Ventures - Narrative (Details) - apartment
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2016
Jun. 30, 2017
Jun. 30, 2017
Dec. 31, 2016
Apr. 30, 2017
Artisan Park, L.L.C | Consolidated variable interest entities          
Variable Interest Entity [Line Items]          
Percentage of cash contribution for joint venture by parent   74.00% 74.00%    
Pier Park Crossings JV          
Variable Interest Entity [Line Items]          
Number of apartments to be designed, developed and constructed         240
Variable interest entity, qualitative or quantitative information, ownership percentage   65.00%      
WindMark JV          
Variable Interest Entity [Line Items]          
Variable interest entity, qualitative or quantitative information, ownership percentage 49.00%   49.00%    
Pier Park North          
Variable Interest Entity [Line Items]          
Variable interest entity, qualitative or quantitative information, ownership percentage     60.00% 60.00%